2. NUT Release Notes (and other feature details)

If you’re upgrading from an earlier version, see the UPGRADING.adoc file.

Please note that web and source document links, product and service names listed in historic entries of past releases may no longer be relevant.

For a complete and more detailed list of changes, please refer to the ChangeLog file (generated for release archives), or to the Git version control history for "live" codebase.

2.1. PLANNED: Release notes for NUT 2.8.4 - what’s new since 2.8.3

https://github.com/networkupstools/nut/milestone/9

  • (expected) Dynamic Mapping Files (DMF) feature supported, to allow the driver binaries to be built once and data mappings to be loaded and modernized on the fly [Ported from 42ITy project]

2.2. PLANNED: Release notes for NUT 2.8.3 - what’s new since 2.8.2

https://github.com/networkupstools/nut/milestone/11

  • (expected) clean-up of libusb API variants support [#300 and follow-ups]
  • (expected) CI automation for coding style
  • (expected) CI automation for use of data points in drivers that conform to patterns defined in docs/nut-names.txt
  • (expected) Porting of performance and bug fixes from 42ITy project
  • (expected) Bug fixes for fallout possible due to "fightwarn" effort in 2.8.0
  • Fix fallout of development in NUT v2.8.0 and/or v2.8.1 and/or v2.8.2:

    • Move of NUT_DEBUG_LEVEL and "-D" CLI option handling to start of driver programs for issue #2259 in NUT v2.8.2 release misfired with regard to data-dump mode (it no longer caused foreground by default). [#2408]
    • The nut-driver-enumerator.sh improvements misfired in v2.8.2 release with an overlooked bit of shell syntax, and caused nut-driver@upsname instances to not auto-restart when ups.conf is edited. [#682, #2410]
    • Addition of "NUT Simulated devices" support to nut-scanner in v2.8.2 broke detection of (in-)ability to find and query "Old NUT" servers via libupsclient.so (internal flag got always enabled). [#2246]
    • A fix for upsmon v2.8.1 setting of OFFDURATION [PR #2108, issue #2104, revisiting PR #2055, issue #2044] was overly zealous and impacted also the OB state in cases where communications to the data server were severed and DEADTIME setting was not honored. [PR #2462, issue #2454]
  • drivers, upsd, upsmon: reduce "scary noise" about failure to fopen() the PID file (which most of the time means that no previous instance of the daemon was running to potentially conflict with), especially useless since in recent NUT releases the verdicts from sendsignal*() methods are analyzed and lead to layman worded situation reports in these programs. [issue #1782, PR #2384]
  • drivers started with the -FF command-line option (e.g. wrapped into the systemd units to stay "foregrounded" and save a PID file anyway) should now also handle an existing PID file to interact with the earlier instance of the driver program, if still running (e.g. started manually). [#2384]
  • Extended instant commands for driver reloading with a driver.exit command for a protocol equivalent of sending a SIGTERM, e.g. when a newer instance of the driver program tries to start. [#1903, #2392]
  • riello_ser updates:

    • added localcalculation option to compute battery.runtime and battery.charge if the device provides bogus values [issue #2390, following in the footsteps of #1692, #1685 done for riello_usb] (similar to runtimecal in some other drivers, may be refactored to that configuration and logic model in later NUT releases)
  • added Visench C1K (using serial port converter with USB ID 1a86:7523) as known supported by nutdrv_qx (Megatec protocol) since at least NUT v2.7.4 release [#2395]
  • usbhid-ups updates:

    • Support of the onlinedischarge_log_throttle_hovercharge in the NUT v2.8.2 release was found to be incomplete. [#2423, follow-up to #2215]
    • MGE HID list of mge_model_names[] was extended for Eaton 5PX and 5SC series (largely guessing, feedback and PRs for adaptation to actual string values reported by devices via USB are welcome), so these devices would now report battery.voltage and battery.voltage.nominal. [#2380]
  • bicker_ser: added new driver for Bicker 12/24Vdc UPS via RS-232 serial communication protocol, which supports any UPS shipped with the PSZ-1053 extension module. [PR #2448]
  • USB drivers could log (nut_)libusb_get_string: Success due to either reading an empty string or getting a success code 0 from libusb. This difference should now be better logged, and not into syslog. [#2399]
  • Introduced a new driver concept for interaction with OS-reported hardware monitoring readings. Currently instantiated as hwmon_ina219 specifically made for Texas Instruments INA219 chip as exposed in the Linux "hwmon" subsystem of its "sysfs" interface (and talking I2C under the hood), this approach seems to have good potential to expand into covering more devices and perhaps platforms. [#2430]
  • upsmon:

    • it was realized that the POWERDOWNFLAG must be explicitly set in the configuration file, there is no built-in default in the binary program (the settings facilitated by the configure script during build "only" impact the upsmon.conf.sample, init-scripts and similar files generated from templates). [issue #321, PR #2383]
    • added an OBLBDURATION (seconds) setting to optionally delay raising the alarm for immediate shutdown in critical situation. [#321]
  • gamatronic driver revised for safer memory operations; this was reported to have fixed a Segmentation Fault seen in earlier NUT releases with some of the devices supported by this driver. [#2427]
  • upsd:

    • upsd_cleanup() is now traced, to more easily see that the daemon is exiting (and/or start-up has aborted due to configuration or run-time issues). Warning about "world readable" files clarified. [#2417]
  • common code:

    • introduced a NUT_DEBUG_SYSLOG environment variable to tweak activation of syslog message emission (and related detachment of stderr when backgrounding), primarily useful for NIT and perhaps systemd. Most methods relied on logging bits being set, so this change aims to be minimally invasive to impact setting of those bits (or not) in the first place. [#2394]
    • root-owned daemons now use not the hard-coded PIDPATH value set by the configure script during build, but can override it with a NUT_PIDPATH environment variable in certain use-cases (such as tests). [#2407]
    • introduced a check for daemons working with PID files to double-check that if they can resolve the program name of a running process with this identifier, that such name matches the current program (avoid failures to start NUT daemons if PID files are on persistent storage, and some unrelated program got that PID after a reboot). [#2463]
  • various recipe, documentation and source files were revised to address respective warnings issued by the new generations of analysis tools. [#823, #2437, nut-website issue #52]
  • revised nut.exe (the NUT for Windows wrapper for all-in-one service) to be more helpful with command-line use (report that it failed to start as a service, have a help message, pass debug verbosity to launched NUT programs…) and add a man page for it. [issue #2432, PR #2446]
  • enabled installation of built single-file PDF and HTML (including man page renditions) under the configured docdir. It seems previously they were only built (if requested) but not installed via make, unlike the common man pages which are delivered automatically. [#2445]

    NOTE: The `html-chunked` documents are currently still not installed.
  • brought keyword dictionaries of nutconf and augeas NUT configuration file parsers up to date; restored automated checks for augeas lenses. [issue #657, issue #2294]

    NOTE: Some known issues remain with augeas lens definitions so currently
    they should be able to parse common simple use-cases but not certain types
    of more complex configurations (e.g. some line patterns that involve too
    many double-quote characters) which are valid for NUT proper. [link:https://github.com/networkupstools/nut/issues/657[#657]]

2.3. Release notes for NUT 2.8.2 - what’s new since 2.8.1

https://github.com/networkupstools/nut/milestone/10

  • Fix fallout of development in NUT v2.8.0 and/or v2.8.1:

    • dstate machinery: a segmentation fault (null pointer dereference) was possible with INSTCMD processing of commands without parameters nor TRACKING identifier. [#2155]
    • USB bus number detection for libusb-1.0 builds was overly zealous and wrongly considered zero values as an error. [#2198]
    • upsmon recognition of CAL state could linger after the calibration activity was completed by the hardware, which led to mis-processing of shutdown triggers. Also, notification was added to report "finished calibration". [issue #2168, PR #2169]
    • upsmon recognition of OFF state as a trigger for FSD (forced shut down) criticality considered also the input line state, which may be an independently evolving circumstance. [issue #2278, PR #2279]
    • upsmon support for POLLFAIL_LOG_THROTTLE_MAX did not neuter the applied setting when live-reloading configuration, so commenting it away in upsmon.conf did not have the effect of resetting the logging frequency to default. It also did not reset the counters to certainly follow the new configuration for existing faults. [issue #2207, PR #2209]
    • upsmon support for POLLFAIL_LOG_THROTTLE_MAX had an off-by-one error (e.g. reporting "Data stale" or "Driver not connected" every 30 sec with POLLFAIL_LOG_THROTTLE_MAX 5 and POLLFREQ 5 settings). [#2207]
    • Drivers running with non-default user account (e.g. with user=root in their configuration) failed to apply group ownership and permissions to their Unix socket file for interaction with the local data server. [#2185, #2096]
    • Dispatcher script scripts/python/app/NUT-Monitor referenced py3qt3 instead of the correct py3qt5. It also tries to check both py2gtk2 and py3qt5 implementations verbosely, even if one is not installed. [#2199, #2201]
    • Set the DesktopFileName in scripts/python/app/NUT-Monitor-py3qt5, this binds the application with the desktop file and allow the Open Desktop compatible implementation to display the proper icon and application name. [#2205]
    • Original recipe for apc_modbus strictly required USB support even if building NUT without it. [#2262]
    • Builds requested with a specific C/C++ language standard revision via CFLAGS and CXXFLAGS should again be honoured. [PR #2306]
    • Allow requesting detailed debug builds (with disabled optimizations for binaries to best match the source code) for supported compilers using configure script option --with-debuginfo. Note that default autoconf behavior usually embeds moderate optimizations and debug information on its own. [PR #2310]
    • A fix applied among clean-ups between NUT v2.7.4 and v2.8.0 releases backfired for usbhid-ups subdriver belkin-hid which in practice relied on the broken older behavior; more details in its entry below. [PR #2371]
  • nut-usbinfo.pl, nut-scanner and libnutscan:

    • Library API version for libnutscan was bumped from 2.2.0 to 2.5.0 during evolution of this NUT release.
    • USB VendorID:ProductID support list files generated by the script for different OS frameworks now include a comment with other possibly compatible driver names, where the respective file format allows for comments.
    • Added the concept of alt_driver_names in nutscan_device_t structure for ability to suggest a comment with other possibly compatible driver names in configuration snippets generated by nut-scanner; practical support implemented for USB connected drivers.
    • Added the concept of commented-away suggested option values comment_tag and a method to nutscan_add_commented_option_to_device(), instead of hacks in prepared config data which broke some use-cases. [#2221]
    • Command-line option -U for USB scan can now be specified several times to increase the detail level about hardware link to the device (this was previously always suggested, but may be not reliable if USB enumeration gets changed over time). [#2221]
    • Added generation of FreeBSD/pfSense quirks for USB devices supported by NUT (may get installed to $datadir e.g. /usr/local/share/nut and need to be pasted into your /boot/loader.conf.local). [#2159]
    • nut-scanner now avoids creating ambiguous nutdevN device section names when called separately to scan different media buses (one at a time). Now the "bus" name would be embedded (e.g. non-colliding nutdev-usb1 and nutdev-snmp1). [#2247]
    • nut-scanner can now discover NUT simulated devices (.dev and .seq files) located in your sysconfig directory, and prepare configuration sections with the simulation driver (currently dummy-ups). [#2246]
    • nut-scanner now reports dummy-ups as driver when scanning NUT "bus" with Old or Avahi method. [#2236, #2245]
  • upsd: Fixed conditions for "no listening interface available" diagnosis to check how many listeners we succeeded with, not whether the first one succeeded or not. If not all requested (non-localhost) listeners were available, default to fail the daemon start-up attempt; support for an ALLOW_NOT_ALL_LISTENERS setting was added to control this behavior. [#723]
  • NUT CI improvements:

    • Added publishing recipes for PyNUT client bindings for NUT, so it ends up in the PyPI repository. [#2158]
    • Added support for new ccache namespace concept, where possible. [#2256]
    • Fixed an issue for builds configured --without-usb. [#2263]
    • Added a fallback for libgd discovery (for CGI etc. builds). [#2287]
    • Made aspell TeX module detection more reliable. [#2206]
    • Fixed recipes for completely out-of-tree builds to pass with documentation generation and checking on all tested "make" implementations. [#2318]
    • Various other recipe and documentation clean-up efforts. [#2284, #2269, #2261]
  • main driver core codebase:

    • Help users of drivers that can be built to support optionally USB and other media (like nutdrv_qx built for serial-only support), and built in fact without USB support but used for USB devices, with some more information to make troubleshooting easier. [issue #2259, PR #2260]
    • Driver programs with debug tracing support via -D CLI option and/or the NUT_DEBUG_LEVEL environment variable now check those earlier in their life-time, so that initialization routine can be debugged. [#2259]
    • Multiple USB-capable drivers got options to customize usb_config_index usb_hid_rep_index, usb_hid_desc_index, usb_hid_ep_in and usb_hid_ep_out hardware connection settings via ups.conf options. This is treated as experimental, not all code paths may be actually using such values from struct usb_communication_subdriver_t rather than hard-coded defaults. Discovery of correct values is up to the user at the moment (using lsusb, internet search, luck…) [#2149]
  • nut-driver-enumerator (NDE) service/script:

    • The optional daemon mode (primarily useful for systems which monitor a large and dynamic population of power devices) was enhanced with a --daemon-after variant which parses the configuration once before daemonization and this has a chance to fail while not forked off, as well as to allow only completing the service unit initialization when everything is actually ready to work (so further dependencies can start at the proper time). [#682]
    • Also applied other optimizations to the script implementation. [#682]
  • powerpanel text driver now handles status responses in any format and should support most devices. [#2156]
  • tripplite_usb driver now allows any device to match if a particular Unit ID was not specified in ups.conf. [PR #2297, issues #2282 and #2258]
  • snmp-ups driver:

    • added support for Eaton EMP002 sensor for ATS16 NM2 sub-driver. [#2286]
    • mapping table updates for apc-mib sub-driver. [#2264]
  • usbhid-ups driver:

    • arduino-hid subdriver was enhanced from "initial bare bones" experimental set of mapped data points to support some 20 more mappings to make it more useful as an UPS driver, not just a controller developer sandbox. [#2188]
    • cps-hid subdriver now supports devices branded as Cyber Energy and built by cooperation with Cyber Power Systems. [#2312]
    • belkin-hid subdriver now supports Liebert PSI5 devices which have a different numeric reading scale than earlier handled models. [issue #2271, PR #2272, PR #2369] Generally the wrong-scale processing was addressed, including a regression in NUT v2.8.0 which led to zero values in voltage data points which NUT v2.7.4 reported well [#2371]
    • The onlinedischarge configuration flag name was too ambiguous and got deprecated (will be supported but no longer promoted by documentation), introducing onlinedischarge_onbattery as the meaningful alias. [#2213]
    • Logged notifications about OL+DISCHRG state should now be throttled (see the driver manual page for more details) [#2214, #2215]:
  • If battery.charge is available, make the message when entering the state and then only if the charge differs from that when we posted the earlier message (e.g. really discharging) and is under onlinedischarge_log_throttle_hovercharge value (defaults to 100%);
  • Also can throttle to a time frequency configurable by a new option onlinedischarge_log_throttle_sec, by default 30 sec if battery.charge is not reported by the device (should be frequent by default, in case the UPS-reported state combination does reflect a bad power condition).
  • nutdrv_qx driver:

    • Fixed handling of battery_voltage_reports_one_pack configuration flag introduced in NUT v2.8.1. [originally by PR #1279; fixed by PR #2324, issue #2325]
  • Various code and documentation fixes for NSS crypto support. [#2274, #2268]
  • Laid foundations for the SmartNUT effort (aiming to integrate drivers with some other backends than the networked NUT data server process).
  • Eaton contributed recipes and scripts used to create the IPP for Unix bundle (aka Eaton IPSS Unix or UPP), a freely available value-added packaging of NUT distributed as the UPS software companion for OSes where their more complex UPS monitoring/management tools had not been ported. This allows for delivery of NUT packages with an interactive installer and some system integration scripts (events, notifications, status, shutdown daemon…), and was contributed to the NUT upstream project by Eaton — provided "as is" at the moment, and may later serve as foundation or inspiration for new NUT features. [#2288]
  • nutconf (C++ library and tool to read and manage NUT configuration files) was started in the open by Eaton employees and used in the IPP installer, but the code lingered in a side branch. It was now brushed up to our common best practices and added to the main codebase. As of this import, there are known deficiencies in Windows platform support, as well as some un-awareness about configuration key words which appeared in NUT since 2013. [#2290]
  • The tools/gitlog2changelog.py.in script was revised, in particular to convert section titles (with contributor names coming from Git metadata) into plain ASCII character set, for dblatex versions which do not allow diacritics and other kinds of non-trivial characters in sections. This can cause successful builds of ChangeLog.pdf file on more platforms, but at expense of a semi-cosmetic difference in those names. [PR #2360, PR #2366]

2.4. Release notes for NUT 2.8.1 - what’s new since 2.8.0

https://github.com/networkupstools/nut/milestone/8

  • "UPS management protocol", Informational RFC 9271 published by IETF at https://www.rfc-editor.org/info/rfc9271 and the IANA port number registry was updated accordingly at https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3493 (even though this RFC is not formally an Internet Standard)
  • NUT documentation files were rearranged, renaming some to *.adoc pattern to facilitate automatic rendering in GitHub and IDE GUIs, and adding recipe support for GitHub issue/PR links. This NEWS file is now proper asciidoc rendered into release-notes.pdf (and HTML versions). [issue #1953, PR #2048] Internally, the documents would use a new way to define cross-linking to other pages and their chapters, to facilitate different renderers (including GitHub UI), and file names created for "chunked HTML" documentation format will no longer have the "chapter number, section number" format which is not easy to maintain over time with independent builds of documentation in NUT and the actual and historic snapshots for nut-website for example. Chapter/Section names will be adapted to produce "chunked HTML" file names instead. Documentation links rendered in GitHub UI should point to the HTML pages served by a current iteration of the NUT website. [PR #226, PR #669]
  • A new configure --enable-spellcheck toggle should add spelling checks to make check (by default, if tools are available) to facilitate quicker acceptance of contributions. [#2067]
  • Published a new maintainer GPG key to sign tags and release artifacts, and possibly git commits as well, as part of solution for issue #1410. You can pull it from common OpenPGP servers with the following command:

    :; gpg --recv-key DE0184DA7043DCF7
    gpg: key DE0184DA7043DCF7: public key "Jim Klimov (Doing FOSS
             since last millennium) <jimklimov@gmail.com>" imported
    gpg: Total number processed: 1
    gpg:               imported: 1

    as part of https://github.com/networkupstools/nut/issues/1410 solution.

  • Bug fixes for fallout possible due to "fightwarn" effort and other evolution in NUT v2.8.0 release:

    • The upsdebugx() and similar methods were converted to macros in #685 to avoid useless data manipulations and requests for logged information, whose results would be ignored instantly because the debug level is too low. As issue #1455 and PR #1495 found, in two cases the called commands did "meaningfully" modify data — so without debug logs the program misbehaved. A known regression for upscode2 driver; might be or not be a problem with upsd server in NUT v2.8.0 release, fixed for NUT v2.8.1.
    • A table in cyberpower-mib (for snmp-ups driver) sources was arranged in NUT v2.8.0 release in a way that precluded the driver logic from looking at all of its entries. Also a fix for instant command definitions had in fact broken them due to other development. Regressions fixed for NUT v2.8.1 [#1432, #2029]
    • A change for file-change detection in dummy-ups driver for NUT v2.8.0 release misfired on some platforms. Regression fixed for NUT v2.8.1 [#1420]
    • Fixed building of NUT man pages when just a few drivers are selected by configure script for custom builds [#1467]
    • Now that upsdrvctl can pass debugging level through to the launched driver(s), they would by default stay in the foreground. This can complicate (or simplify, when intentional) the management of service instances. Now there are explicit upsdrvctl options for choosing this (-F/-B), although default behavior is retained. Note that explicit foregrounding mode also keeps upsdrvctl tool from exiting and would not wait for one driver to complete initialization before starting another in case of mass-management loop to start all drivers (without specifying the single device) [#1759, #1806, #1875]
    • The apcsmart and apcsmart-old handled invalid data too zealously and aborted instead of skipping over it, like they did before [#2015]
    • A bit maths optimization in riello_ser and riello_usb misfired [#2137]
    • Something about compile-time macros or other warnings-related refactoring seems to have confused the MGE SHUT (Serial HID UPS Transfer) driver support [#2022]
    • Some warnings were not detected by the tools or build scenarios used earlier, and only got addressed now
  • An issue was identified which could cause libupsclient parser of device and host names to crash upon bad inputs (e.g. poorly resolved environment variables in scripts). Now it should fail more gracefully [#2052]
  • New configure --enable-inplace-runtime option should set default values for --sysconfdir, --with-user and --with-group options to match an existing NUT deployment — for users who are trying if a custom build of recent codebase solves their practical issues. For "quick tests", a shortcut operation ./ci_build.sh inplace was added [#1714]
  • State tree structure and methods (including "dstate" wrapper for common driver internals) was enhanced with time-stamping of last modification (setting, changing, deleting the value or some fields in an entry): this allows to detect stale information in a centralized fashion [#2010]
  • We lacked log information about changes of chroot jail (uncommon) and of UID/GID (everywhere), which makes troubleshooting harder (e.g. lack of access to config files or USB device nodes). Now we have it [#1694]
  • A NUT_DEBUG_PID envvar (presence) support was added to add current process ID to tags with debug-level identifiers. This may be useful when many NUT daemons write to the same console or log file. [#2118]
  • huawei-ups2000 is now known to support more devices, noted in docs and for auto-detection [#1448, #1684]
  • nutdrv_qx updates:

    • a battery_voltage_reports_one_pack driver option was added for devices which "natively" report a battery.voltage for a single battery pack or cell, not for the whole assembly [#1279]
    • the voltronic_qs_protocol should now accept both "V" (as before) and newly "H" dialects, which otherwise seem interchangeable [#1623]
    • the armac subdriver was enhanced to support devices with a different response pattern than previously expected per initial contribution. It was tested to work with Vultech V2000 and Armac PF1 series. [#1978]
  • nutdrv_qx and blazer updates:

    • extended default ranges for max battery voltage when guessing [#1279]
  • sms_ser, a driver for SMS Brazil UPS Protocol 1Phase, was introduced. NOTE: it may later become a subdriver under nutdrv_qx. [#2090]
  • usbhid-ups updates:

    • added support for subdriver configuration option, to select the USB HID subdriver for the device manually where automatic match does not suffice (e.g. new devices for which no vendorid/productid pair was built into any driver, or for different-capability devices with same interface chips, notably "phoenixtec/liebert" and "mge") [#1369]
    • cps-hid subdriver now applies same report descriptor fixing logic to devices with ProductID 0x0601 as done earlier for 0x0501, to get the correct output voltage data [#1497]
    • apc-hid subdriver now also supports ProductID 0x0004 [#1429]
    • ever-hid subdriver reported a powerfactor without a namespace (bug in 2.8.0 release), fixed to outlet.powerfactor
    • the usbhid-ups driver should now reconnect if libusb returned a memory allocation error [#1422] (seen as "Can’t retrieve Report 0a: Resource temporarily unavailable"), which can cause practical problems in the field — the driver otherwise interpreted the situation as ups.status being OL OFF and cut the power supply.
    • powercom-hid subdriver: fixed UPS.Battery.ManufacturerDate to map to battery.mfr.date (not battery.date which is the maintenance replacement date) [#1644]
    • added onlinedischarge_calibration option for UPSes that report OL+DISCHRG when they are in calibration mode [#2104]
  • riello_usb updates:

    • added localcalculation option to compute battery.runtime and battery.charge if the device provides bogus values [#1692, #1685] (similar to runtimecal in some other drivers, may be refactored to that configuration and logic model in later NUT releases)
  • powercom driver should now try harder to refresh data from device [#356]
  • tripplite_usb driver now supports configuration of upsid to match the specific device (not all firmware/hardware models support this) [#2075]
  • apcupsd-ups:

    • improvement for POLL_INTERVAL_MIN from PR #797 was buggy [#2007]
    • fix to clean obsoleted readings (if any) AFTER getting new info from an apcupsd daemon, to avoid the gap when NUT driver knows nothing [#2007]
  • apc_modbus driver was introduced, to cover the feature gap between existing NUT drivers for APC hardware and the actual USB-connected devices (or their firmwares) released since roughly 2010, which deprecated standard USB HID support in favor of Modbus-based protocol which is used across the board (also with their network management cards). The new driver can monitor APC UPS devices over TCP and Serial connections, as well as USB with a patched libmodbus (check https://github.com/EchterAgo/libmodbus/commits/rtu_usb for now, PR pending). [#139, #2063]

    • For a decade until this driver got introduced, people were advised to use apcupsd project as the actual program which talks to a device, and NUT apcupsd-ups driver to relay information back and forth. This was a limited solution due to lack of command and variable setting support, as well as relaying of just some readings (just whatever apcupsd exposes, further constrained by what our driver knows to re-translate), with little leverage for NUT to tap into everything the device has to offer. There were also issues on some systems due to packaging (e.g. marking NUT and apcupsd as competing implementations of the same features) which required clumsy workarounds to get both installed and running. Finally, there is a small matter of long-term viability of that approach: last commits to apcupsd sources were in 2017 (with last release 3.14.14 in May 2016): https://sourceforge.net/p/apcupsd/svn/HEAD/tree/
  • dummy-ups:

    • Added an repeater_disable_strict_start option to disable the driver exiting upon encountering any kind of error at startup (as repeater). This option should allow for collective upsdrvctl startup despite individual target UPS to be repeated or upsd not having come up yet. [#2132]
    • Revised detection of file path (for "dummy" mode) which misfired under some conditions, and unified several implementations. [#2118]
  • NUT for Windows:

    • Ability to build NUT for Windows, last tackled with a branch based on NUT v2.6.5 a decade ago, has been revived with the 2.8.x era codebase [#5]. It is known that at this time some features are not complete, for more details see https://github.com/orgs/networkupstools/projects/2/views/1
    • Cross-builds of NUT for Windows using Linux and MinGW (and many custom built dependency packages, as documented in the scripts/Windows/README.adoc file) are now regularly tested on NUT CI farm with moderate integration via custom build script scripts/Windows/build-mingw-nut.sh [#1489]
    • Semi-native NUT for Windows builds with MSYS2/MinGW x64 environment are now regularly tested on AppVeyor, with the same ci_build.sh script and Makefile checks as used across the board for local developer builds, Linux/illumos/FreeBSD/OpenBSD/… on dedicated NUT CI farm on Fosshost, and MacOS on CircleCI [#1552]
  • snmp-ups updates:

    • Fixed detection for device agents which wrongly return the sysOID value as a string instead of an OID [#1710]
    • Clearer messages about skipping MIBs during driver initialization [#2037]
    • IETF MIB mapping updated for data points where negative readings are invalid [#1558]
    • Added SNMP subdriver "apc-epdu-mib" for APC easy PDU support [#1674]
    • Added SNMP subdriver "eaton-pdu-nlogic-mib" for nLogic (rebranded Eaton) support [#1698]
    • Added SNMP subdriver "hpe-pdu3-cis-mib" for HPE G2 Metered & Switched PDU initial "unitary" support (no daisychain support yet); also note that due to SNMP v1 implementation limitations on this device, you should prefer SNMP v3 to get both read and write rights [#1713]
    • Fixed processing loop for large SNMPv2/SNMPv3 responses where one item in the middle has a type error [#1682]
    • Better manage the slight nuances (especially in ups.status) between Eaton UPSs, and rename mibs from pw to eaton_pw_nm2, and from pxgx_ups to eaton_pxg_ups [#1715]
    • Fixed the long standing "Warning: excessive poll failures" issue, that was tied to non-existent OIDs, not well handled in some parts of the driver [#1716]
    • baytech-mib.c subdriver: fixed baytech_outlet_status_info[] set of valid outlet status values [#1871]
    • cyberpower-mib.c subdriver: support devices which report the shorter Vendor OID as their sysOID, e.g. "CyberPower PowerPanel Personal" [#1997] and support more data points including hardware status alarms [#1982]
  • The bestfortress driver shutdown handling was fixed to use a non-trivial default timeout [#1820]
  • The optiups driver only gave accurate voltage information with 120VAC models and assumed a 12V battery when calculating capacity. There is a protocol command that gives a (fixed) voltage which correlates with the voltage selection DIP switches on the back of the UPS, taking into account whether it is a 120 or 240VAC model. Likewise, now the battery capacity fix is applied globally, based on whether or not the battery voltage is greater than 20V. [#2089]
  • GPIO drivers [#1855]:

    • Added a new category of drivers, using GPIO interface to locally connected devices (currently limited to 2018+ Linux libgpiod, but its architecture was designed to support more OSes with their equivalents - PRs welcome)
    • generic_gpio_libgpiod driver using libgpiod backend was added (defaults to be required on Linux, optional on other platforms)
  • Added support for make install of PyNUT module and NUT-Monitor desktop application [#1462, #1504]
  • Regular CI coverage for NUT codebase enhanced with CircleCI running some scenarios on MacOS, might add Windows in the future. Fixed some build issues for MacOS that had crept into NUT v2.8.0 release [#1415, #1421]
  • NUT software-only drivers (dummy-ups, clone, clone-outlet) separated from serial drivers in respective Makefile and configure script options [#1446]
  • Fixed support for common USB matching options ("vendor", "device", "bus", etc.) for riello_usb and richcomm_usb [#1763] and updated man pages of all USB drivers using these options to include the same description [#1766]
  • Added a "busport" USB matching option (if supported by the hardware, OS and libusb on the particular deployment, it should allow to specify physical port numbers on an USB hub, rather than logical "device" enumeration values, and in turn — this should be less volatile across reboots etc.) [#2043]
  • Added an allow_duplicates flag for common USB matching options which may help monitor several related no-name devices (although without knowing reliably which one is which… better than nothing) [#1756]
  • The nut-scanner program should now suggest same configuration fields as those used by common USB matching options in (most of the) drivers, e.g. adding "device" to the generated configuration section [#1790]
  • Stuck drivers that do not react to SIGTERM quickly are now retried with SIGKILL [#1424]
  • Each driver should now report its driver.state to help readers determine whether it is initializing, reconnecting, or running regular loops [#1767]
  • Code which resolves full paths to libraries should now consider the common environment variable LD_LIBRARY_PATH as a preferred possible override to built-in paths (note that most operating systems advise against setting this variable unless troubleshooting, although other systems rely on it) [#805]
  • Debug information tracing methods like upsdebugx() should now be less limited in the sizes of messages that they can print, such as path names that may be quite long. Note that the OS methods manipulating the strings, and receivers such as logging systems, may still impose limits of their own.
  • The nut-scanner usage and debug printouts now include the loadable library search paths, to help troubleshooting especially in multi-platform builds; pre-filtering of the built-in paths was introduced (to walk only existing and unique directory names) [#317]
  • The nut-scanner program was updated to fall back to loading unresolved library filenames, hoping that lt_dlopen() implementation on the current platform would find library files better [#805]
  • Detection of libltdl in configure script updated with fallback code to find it on systems that deliver the library to /usr/local/lib (e.g. on FreeBSD) [#1577]
  • An explicit configure --with-nut-scanner toggle was added, specifically so that build environments requesting --with-all but lack libltdl would abort and require either to install the dependency or explicitly forfeit the tool (some distro packages missed it quietly in the past) [#1560]
  • The nut-scanner program should now by default warn about serial numbers which do not make much sense (are duplicate, empty, all same character, etc) [#1810]
  • Existing openssl-1.1.0 support added for NUT v2.8.0 release was tested to be sufficient without deprecation warnings for builds against openssl-3.0.x (but no real-time testing was done yet) [#1547]
  • upslog: Added support for logging multiple devices with one call to the program [#1604]
  • Documentation to integrate NUT USB driver startup with usb_resetter script has been contributed to scripts/usb_resetter (the script itself is tracked externally on GitHub), along with a configuration example for Linux+systemd [#1887]
  • Some fixes applied to Solaris/illumos packaging and SMF service support [#1554, #1564]
  • Some fixes for builds on older OSes with less functional default system shell interpreters - now autogen.sh supports a CONFIG_SHELL envvar to inject its value into generated configure script [#1736]

    • Note that you may have to install additional tools (possibly from third-party FOSS packaging efforts) to prepare and build the NUT codebase, and/or prefer non-default system provided implementations (e.g. to use the XPG4 grep with -E support on Solaris as detailed in https://github.com/networkupstools/nut/issues/1736 comments)
    • Build environment configuration notes in docs/config-prereqs.txt file refreshed to cover building of current NUT codebase in CentOS 6 [#1804] and Solaris 8 [#1736, #1738]
  • configure script, reference init-script and packaging templates updated to eradicate @PIDPATH@/nut ambiguity in favor of @ALTPIDPATH@ for the unprivileged processes vs. @PIDPATH@ for those running as root [#1719]
  • configure script enhanced: --with-unmapped-data-points option allows to build SNMP and USB-HID subdrivers with entries discovered by the scripts which generated them from data walks, but developers did not rename yet to NUT mappings conforming to docs/nut-names.txt standards [#1699]
  • PyNUT.py version bumped to 1.5.0 with some improvements:

    • ListClients() method fixed (was broken in many ways), and is now CI-tested [#549]
    • DeviceLogin() method added (mostly as aid to CI-test ListClients() in a practically relevant manner, so far)
  • nutclient C++ library:

    • added listDeviceClients() and deviceGetClients(dev) to Client classes, and Device::getClients() to match PyNUT capabilities [#549]
    • published artifacts may include a libnutclientstub which is an implementation of a NUT TCP client in C++ with in-memory data store.
  • upsclient C library:

    • added support for NUT_QUIET_INIT_SSL environment variable to hide the infamous "Init SSL without certificate database" warning [#1662]
  • The upsd.conf listing of LISTEN addresses was previously inverted (the last listed address was applied first), which was counter-intuitive and fixed for this release [#2012]
  • The upsd configured to listen on IPv6 addresses should handle only IPv6 (and not IPv4-mappings) to avoid surprises and insecurity; it will now warn if a host name resolves to several addresses (and will only listen on the first hit, as before in such cases) [#2012]
  • A definitive behavior for LISTEN * directives became specified, to try handling both IPv4 and IPv6 "any" address (subject to upsd CLI options to only choose one, and to OS abilities). When both address families are enabled, the upsd data server will first try to open an IPv6 socket asking for disabled IPv4-mapped IPv6 address support (if the OS honors that), and then an IPv4 socket (which may fail if the IPv6 socket already covers it anyway); in other words, you can end up with one or two separate listening sockets. [#2012]
  • sstate (server state, e.g. upsd) should now "PING" drivers also if they last reported themselves as "stale" (and might later crash) so their connections would be terminated if really no longer active [#1626]
  • Clarified documentation in codebase according to end-user feedback [#1721, #1750 and others over time]
  • upsmon client changes include:

    • Several fixes for upsmon behavior [#1761, #1680…], including new ability to configure default POWERDOWNFLAG location — packagers are encouraged to pick optimal location for their distributions (which remains mounted at least read-only late in shutdown) and a new optional POLLFAIL_LOG_THROTTLE_MAX setting [#529, #506]
    • Also upsmon should now recognize OFF and BYPASS flags in ups.status and report that these states begin or end. The OFF state usually means than an administrative action happened to power off the load, but the UPS device is still alive and communicating (USB, SNMP, etc.); corresponding MONITOR'ed amount of power sources are considered not being "fed" for the power value calculation purposes. The BYPASS state is now treated similarly to ONBATT: currently this UPS "feeds" its load, but if later communications fail, it is considered dead. This may have unintended consequences for devices (or NUT drivers) that do not report these modes correctly (e.g. an APC calibration routine seems to start with a few seconds of "OFF" state), so the reported status is only considered as a loss of feed if it persists for more than OFFDURATION seconds. [#2044, #2104]
    • Introduced SHUTDOWNEXIT no configuration toggle for systems which require a long time to stop their workload such as virtual machines. Since the disconnection of a "secondary" client is treated by the "primary" system as permission to proceed with its own shutdown and power-off for the UPS, the original (now merely default) behavior to call SHUTDOWNCMD and immediately exit could be counter-productive. An optional delay can also be introduced. [#2133]
    • Note there were other changes detailed below which impacted several NUT programs, including upsmon.
  • Extended Linux systemd support with optional notifications about daemon state (READY, RELOADING, STOPPING) and watchdog keep-alive messages [#1590]

    • Normally inability to send such notifications (e.g. lack of systemd or similar framework on the particular platform) would be reported once per daemon uptime on its console log, to help troubleshooting situations where such lack of notifications can cause automated service restarts. These messages can be hidden by setting NUT_QUIET_INIT_UPSNOTIFY=true environment variable in init-scripts on platforms where such frameworks are not expected. [#2136]
  • Extended Linux systemd units with aliases named after the daemons: nut-server.service as upsd.service, and nut-monitor.service as upsmon.service (so simple systemctl reload upsd can work) [#1777]
  • Extended driver-server socket protocol with BROADCAST (num) keyword, and a NOBROADCAST as a shortcut for BROADCAST 0. This allows clients to toggle whether they want to receive send_to_all() updates from a driver, or only answers to requests they send [#1914]
  • Added support for make sockdebug for easier developer access to the tool; also if configure --with-dev is in effect, it would now be installed to the configured libexec location. A man page was also added. [#1936]
  • Numerous daemons (upsd, upsmon, drivers, upsdrvctl, upssched) which accepted -D option for debug setting previously, now can also honour a NUT_DEBUG_LEVEL=NUM environment variable if no -D arguments were provided. Unlike those arguments, the environment variable does not enforce that daemons run in foreground mode by default [#1915]

    • Note that unlike some other NUT daemons, upssched with enabled debug does not stop reporting on stderr! [#1965]
  • A bug in upssched was discovered and fixed, where it ran a tight loop stressing the CPU; it was presumably introduced between NUT v2.7.4 and v2.8.0 releases [#1964, #1965]
  • Implemented generic support for INSTCMD and SETVAR use-cases shared by all drivers, and in particular to see and change active debug verbosity using the driver-server and server-client protocol (at higher priority than CLI or config file choices) per [#1285], e.g.
# Set verbosity level 6:
:; upsrw -s driver.debug=6 UPS

# Set verbosity level 0 to disable the noise (even if debug_min is set):
:; upsrw -s driver.debug=0 UPS1@localhost

# Un-set the protocol override, honour CLI or config-file settings again:
:; upsrw -s driver.debug=-1 remoteUPS@1.2.3.4

+ and a driver.killpower instant command (for safety, must be unlocked by driver.flag.allow_killpower protocol setting or allow_killpower configuration flag), which is now the first choice for driver -k operations [#1917, #1923]

  • Implemented basic support for ups.conf reloading in NUT drivers, with a driver.reload-with-error instant command (more commands and signal handling may be available depending on platform), with a goal of changing inconsequential settings like debug_min for a running driver. This can also benefit the drivers on systems managed by real-time nut-driver-enumerator and for simpler changes the drivers get only reloaded and not redefined and restarted. Reload signals should also be reasonably supported with upsdrvctl tool. Relevant CLI options for -c CMD handing were added to drivers and upsdrvctl, although their availability may vary between operating systems [#1903, #1914, #1924]
  • Drivers should now accept SIGURG (or SIGWINCH on systems that lack the former) on POSIX platforms to dump their current state information and move on. Such report goes to stdout of the driver process (may be disconnected when background mode is used) — this can help with troubleshooting [#1907]
  • Recipes and main.c code were enhanced to produce a libdummy_mockdrv.la helper library during build (not intended to be installed nor distributed), in order to facilitate creation of test programs which behave like a driver [#1855]
  • Further revision of public headers delivered by NUT was done, particularly to address lack of common data types (size_t, ssize_t, uint16_t, time_t etc.) in third-party client code that earlier sufficed to only include NUT headers. Sort of regression by NUT 2.8.0 (note those consumers still have to re-declare some numeric variable types used) [#1638, #1615]
  • The COPYING file was updated with licenses and attribution for certain source code files and blocks coming from the Internet originally [#1758]
  • The tools/gitlog2changelog.py.in script was revised, in particular to generate the ChangeLog file more consistently with different versions of Python interpreter, and without breaking the long file paths in the resulting mark-up text [#1945, #1955]
  • The "NUT client for VMware ESXi" project (by René Garcia) got its build recipes published on GitHub at https://github.com/rgc2000/NutClient-ESXi [#1961]

2.5. Release notes for NUT 2.8.0 - what’s new since 2.7.4

Note

Earlier discussions (mailing list threads, GitHub issues, etc.) could refer to this change set (too long in the making) as NUT 2.7.5.

  • New (optional) keywords for configuration files were added, so existing NUT 2.7.x builds would not accept them if some deployments switch versions back and forth — due to this, semantically the version was bumped to NUT 2.8.x.
  • Add support for openssl-1.1.0 (Arjen de Korte)
  • libusb-1.0 API support in addition to libusb-0.1 API [#300]
  • Add support for DISABLE_WEAK_SSL=true in upsd.conf to disable older/weaker SSL/TLS protocols and ciphers: when NUT is built against relatively recent versions of OpenSSL or NSS it will be restricted to TLSv1.2 or better. For least-surprise, currently defaults to false and complains in log [PR #1043]
  • Add support for ALLOW_NO_DEVICE=true (as an upsd.conf flag or environment variable passed from caller of the program), to allow starting the data server initially without any device configurations and reloading it later to apply config changes on the fly [PR #766]
  • Add support for debug_min=NUM setting (ups.conf, upsd.conf, upsmon.conf) to specify the minimum debug verbosity for daemons. This allows "in-vivo" troubleshooting of service daemons without editing init scripts or service unit definitions.
  • Improve support for upsdrvctl for managing of numerous device configs, including default "maxretry=3" and a "nowait" option to complete the "start of everything" mode after triggering the drivers and not waiting for them to complete initializing. This matters on systems that monitor from dozens to hundreds of devices.
  • Drivers support a new value for synchronous setting, which is the new default now: auto. Initially after driver start-up this mode acts as the older default off, but would fall back to on in case the driver fails to send reports to upsd by overflowing the socket buffer in async mode — so the next connections of this driver uptime would be synchronized (potentially slower, but safer — blocking on writes to the data server). This adaptation would primarily impact and benefit devices with many (hundreds of) data points, such as ePDUs and daisy chains. [issue #1309, PR #1315]
  • Daemons such as upsd, upsmon, upslog, and device drivers previously implied that enabled debugging (or upslog to stdout) means foreground running, otherwise the daemon was always sent to the background. Now there are explicit options for this (-F/-B), although default behavior is retained. This change is used for simplified service unit definitions.
  • Improvements for device discovery or driver "lock-picking", including general support for:

    • "Standalone" mode (-s option), to monitor a device which is not detailed or mentioned in ups.conf
    • NUT_ALTPIDPATH and NUT_STATEPATH environment variables to override the paths built into the driver binary [PR #473 and #507]
    • "Driver data dump" mode (-d option), to poll a device for one or few (update_count ) loops, report discovered values (dump the data tree in upsc-like format), and exit. This complements the nut-scanner for finding and identifying devices.
  • support for new devices:

    • IBM 6000 VA LCD 4U Rack UPS; 5396-1Kx (USB)
    • Phoenix Contact QUINT-UPS model 2320461 (Modbus)
    • Tripp-Lite SU3000LCD2UHV (USB; protocol 1330)
    • Emerson Avocent PM3000 PDU (SNMP)
    • HPE ePDU (SNMP)
  • nutdrv_qx: enhanced estimation of remaining battery runtime based on speed of voltage drop, which varies as they age [PR #1027]
  • nutdrv_qx: several subdrivers added or improved, including:

    • "snr" subdriver with USB connection, for SNR-UPS-LID-XXXX [PR #1008]. Note that end-users should reference explicitly the snr subdriver in their ups.conf settings because of USB chip using the same values of VendorID/ProductID as fabula_subdriver, fuji_subdriver, and krauler_subdriver.
    • "hunnox" subdriver, as a dialect of earlier "fabula" [PR #638] adds support for Hunnox HNX-850 with USB connection and reported to work for Powercool, Iron Guardian, ARES devices and possibly many others from discussions linking to the pull request which introduced the driver.
    • "phoenixtec" subdriver for Masterguard A and E series, device series A700/1000/2000/3000(-19) and E40/60/100(-19). [PR #975]
    • "ablerex" subdriver provided by the OEM vendor, note that it replaces "krauler_subdriver" as default handler for VID:PID 0xffff:0x0000 [PR #1135]
    • Legrand HID defined and handled by "krauler_subdriver" by default [PR #1075, issue #616]
    • add new "armac" subdriver, tested with Armac R/2000I/PSW, but should support other UPSes that work with "PowerManagerII" software from Richcomm Technologies from around 2004-2005 [PR #1239, issue #1238]
  • microsol-apc (starting at version 0.68 as derived from solis 0.67): adding support for newer APC Back-UPS BR hardware, such as APC Back-UPS BZ1500, BZ2200BI and BZ2200I [PR #994]
  • pijuice: added new i2c bus driver for PiJuice HAT, a battery UPS module for the Raspberry Pi systems [PR #730]
  • huawei-ups2000: added new driver for USB (Linux 5.12+ so far) and Serial RS-232 Modbus device support of Huawei UPS2000/2000A (1kVA-3kVA) series, and possibly some related FSP UPS models. [PR #954]
  • socomec_jbus: added new driver for modbus-based JBUS protocol over serial RS-232 for Socomec UPS (tested with a DIGYS 3/3 15kVA model, working on Linux x86-64 and Raspberry Pi 3 ARM). [PR #1313]
  • adelsystem_cbi: added new driver for ADELSYSTEM CBI2801224A, an all-in-one 12/24Vdc DC-UPS, which supports the modbus RTU communication protocol [PR #1282]
  • generic_modbus: added new driver for TCP and Serial Modbus device support. The driver has been tested against PULS UPS (model UB40.241) via MOXA ioLogikR1212 (RS485) and ioLogikE1212 (TCP/IP), and configuration allows to map custom registers and addresses to NUT events [PR #1052]
  • genericups: added support for FTTx battery backup devices, and new signal type mappings for the contact closure pins interpretation (RB for replace battery, BYPASS for disconnected battery, and "none" or NULL for signals to ignore) [PR #1061]
  • add devices to HCL/DDL:

    • APC Back-UPS CS (USB)
    • CPS CP1500EPFCLCD (USB)
    • CPS EC350G, EC750G (USB)
    • CPS PR2200LCDRT2U (SNMP)
    • Eaton ATS 16 and 30 (SNMP)
    • Eaton 5E2200VA (USB)
    • Eaton 9PX Split Phase 6/8/10 kVA (XML/USB/SHUT)
    • Eaton 9PX (XML/USB/SHUT)
    • Eaton Ellipse PRO 650 VA (USB)
    • Ippon Back Comfo Pro II 650/850/1050 (USB)
    • Numeric Digital 800 (USB)
    • Opti-UPS PS1500E (USB)
    • Powercool 350VA to 1600VA (USB)
  • C++11 support in nutclient library and cppunit tests
  • Added C++ testing mock for TcpClient class (nutclientmem/MemClientStub: data stored in local memory) [PR #1034]
  • Dual Python 2 and 3 compatibility in development scripts; ability to run build activities and resulting built NUT programs on systems that do not have a binary named "python" [PR #1115 and some before it]
  • Added Russian translation for NUT-Monitor GUI client [PR #806]
  • Separated NUT-Monitor UI into two applications, NUT-Monitor-py2gtk2 and NUT-Monitor-py3qt5, suitable for two generations of Python ecosystem with their great differences; NUT-Monitor name is retained for wrapper script which calls one of these, such that the current system can execute [PRs #1310, #1354]
  • Various USB driver families: expanded device-matching with "device" in addition to "bus" and generic USB fields. This is needed to support multiple attached devices that seem identical by other fields (e.g. same vendor, same model, same USB bus, and no serial number) [PR #974]
  • Various USB driver families: Improved HID parsing for byte-stream to number conversions on different CPU architectures [PR #1024]
  • Various USB HID driver families: added support for composite devices utilizing interface greater than 0 for the UPS interface [PR #1044]
  • usbhid-ups:

    • added generic framework for fixing Report Descriptors which can be used for different manufacturers by adding code to the appropriate subdriver rather than polluting the main code with UPS specific exceptions, and applied fixes for known mistakes in (some releases of firmware for) CyberPower CPS*EPFCLCD [issue #439, PR #1245]
    • added onlinedischarge option for UPSes that report OL+DISCHRG when wall power is lost [PR #811]
    • changed detection of VendorID 0x06da handling of which is claimed by Liebert/Phoenixtec HID historically, and MGE HID (for AEG PROTECT NAS UPSes) since NUT 2.7.4, so that the higher-priority MGE subdriver would not grab each and all of the devices exposing that ID [PR #1357]
    • CPS HID: add input.frequency and output.frequency
    • OpenUPS2: only check OEM Information string once (fewer log messages)
    • Liebert GXT4 USB VID:PID [10AF:0000]
    • add battery voltage and input/output transfer voltage and frequency in Liebert/Phoenixtec HID mapping, to support PowerWalker VFI 2000 TGS better [PR #564, issue #560]
    • add a little delay between multicommands [PR #1228]
    • fix Eaton/MGE mapping for beeper handling
    • add IBM USB VID
    • add deep battery test for CyberPower OL3000RMXL2U
    • report the libusb version used
    • fixed CPU architecture dependent bitmask math issues, causing wrong numbers interpreted from wire protocol data in Big-Endian LP64 builds (SPARC64, s390x, etc.) [issue #1023, PRs #1024, #1040, #1055, #1226]
    • add Delta UPS Amplon R Series, tested on R1K and R3K model [PR #987]
    • add Delta Minuteman UPS VID/PID [PR #1230, issues #555 and #1227]
    • add AMETEK Powervar UPM [PR #733]
    • add Tripplite AVR750U (ProductID 0x3024) [PR #963]
    • add Arduino HID device support with new arduino-hid subdriver [PR #1044]
    • add new salicru-hid subdriver, tested with Salicru SPS Home 850 VA [PR #1199, issue #732]
    • add new ever-hid subdriver to support EVER UPS devices (Sinline RT Series, Sinline RT XL Series, ECO PRO AVR CDS Series) [PR #431]
    • add ability to set battery.mfr.date for APC HID UPS [PR #1318]
  • usbhid-ups / mge-shut: compute a realpower output load approximation for Eaton UPS when the needed data is not present
  • snmp-ups:

    • APC ePDU MIB support
    • add input.phase.shift variable
    • add configurable write-able ondelay (ups.delay.start) and offdelay (ups.delay.shutdown) as timeticks support [PR #276]
    • outlet groups
    • fix the rounding / truncation of some values
    • add outlet.N.name for Eaton ePDU
    • add input.bypass.frequency for Eaton 3ph
    • fix support for Eaton 2-phase ("split phase") UPS
    • add flag to list currently loaded MIB-to-NUT mappings
    • fix input.L2.voltage on Eaton G2/G3 PDU
    • update Eaton Aphel Revelation MIB
    • support Raritan Dominion PX2 PDU
    • support Emerson Avocent PM3000 PDU
    • improve ALARM flag handling
    • add firmware version for new HPE Network card
    • add ups.load, battery.charge, input.{voltage,frequency} and output.voltage for CyberPower, as well as shutdown and other instant commands
    • several rounds of updates for Eaton devices, including new ATS and ePDU hardware families
    • fixed bit mask values for flags to surely use different numbers behind logical items (inevitably changing some of those macro symbols) [PR #1180]
  • snmp-ups and nut-scanner should now support more SNMPv3 Auth and Priv protocols, as available at NUT build time [PRs #1165, #1172]
  • nut-scanner: various improvements, including:

    • detection of libraries at runtime
    • tracing information
    • limiting parallelism (thread count) [PRs #1158, #1164]
  • nut-ipmipsu: improve FreeIPMI support to build cleanly against older and newer FreeIPMI versions [PR #1179]
  • the powerpanel driver now also supports CyberPower OR1500LCDRTXL2U with serial cable [PR #538]
  • powercom driver: implement nobt config parameter to skip battery check on initialization/startup [PR #1256]
  • netxml-ups:

    • Report calibration status
    • Fix for erroneous battery info (MGEXML/0.30) [PR #1069]
  • solis: various improvements and fixes
  • liebert-esp2: Correct battery V scaling, update docs, implement split-phase unit support [PR #412]
  • tripplite: the "Tripp-Lite SmartUPS driver" as tested with SMART2200NET learned to discover the firmware generation and some device features, and in particular to manage power separately on one or two outlet groups [PR #1048]
  • tripplite_usb: updated to recognize the "3005" protocol [PR #584]
  • libnutclient: introduce getDevicesVariableValues() to improve performances when querying many devices (up to 15 times faster)
  • nut-driver-enumerator: introduced a script for Linux systemd and Solaris/illumos SMF to inspect current NUT configuration in ups.conf file and generate service management instances for each currently tracked power device. Also introduced services to monitor the NUT configuration and react to editions of this file, mostly intended for deployments that do massive monitoring of dynamically changing farms of power devices.
  • Fix File descriptors leaks by upsmon and upssched (SELinux errors)
  • systemd support improvements:

    • POWEROFF_WAIT
    • reload support for upsd
    • Deliver systemd-tmpfiles config to pre-create runtime locations [PR #1037 for Issue #1030]
    • Update units with SyslogIdentifier=%N for better logging [PR #1054]
  • upsrw: display the variable type beside ENUM / RANGE
  • Added PROTVER as alias to NETVER to report the protocol version in use. Note that NUT codebase itself does not use this value and handles commands and reported errors individually [issue #1347]
  • Implement status tracking for instant commands (instcmd) and variables settings (setvar): this allows to get the actual execution status from the driver, and is available in libraries and upscmd / upsrw [PR #659]
  • Add support for extra parameter for instant commands, both in library and in upscmd
  • dummy-ups can now specify mode as a driver argument, and separates the notion of dummy-once (new default for *.dev files that do not change) vs. dummy-loop (legacy default for *.seq and others) [issue #1385]
  • new protocol variables:

    • input.phase.shift
    • outlet.N.name
    • outlet.N.type
    • battery.voltage.cell.max, battery.voltage.cell.min
    • battery.temperature.cell.max, battery.temperature.cell.min
    • battery.status
    • battery.capacity.nominal
    • battery.date.maintenance (and clarified purpose of battery.date)
    • battery.packs.external (and clarified purpose of battery.packs)
    • experimental.* namespace introduced [PR #1046] to facilitate introduction of NUT drivers and their data points for which we do not yet have concepts, or which the original driver contributors did not map well per suitable NUT standards: this allows to balance having those drivers available in the project vs. least surprise for when the explicitly experimental names are changed to something stable and standardized.
    • Proposed to track Date and Time values (still as "opaque strings") preferably in representations compatible to ISO-8601/RFC-3339 [PR #1076] (standards update; changes to actual codebase to be applied in the future)

      • New routine to convert a US formatted date string "MM/DD/YYYY" to an ISO 8601 Calendar date "YYYY-MM-DD" was added to snmp-ups.c [PR #1078]
  • Master/Slave terminology was deprecated in favor of Primary/Secondary modes of upsmon client:

    • Respective keywords in the configuration files (upsd.users and upsmon.conf) are supported as backwards-compatible settings, but the obsoleted values are no longer documented.
    • Protocol keyword support was similarly updated, with upsmon now first trying to elevate privileges with PRIMARY <ups> request, and falling back to MASTER <ups> just in case it talks to an older build of an upsd server.
    • For the principle of least surprise, NUT codebase still exposes the net_master() (as handler for MASTER net command) in header and C code for the sake of existing linked binaries, and returns the OK MASTER-GRANTED line to the older client that invoked it.
    • Newly introduced net_primary() (as handler for PRIMARY net command) calls the exact same application logic, but returns OK PRIMARY-GRANTED line to the client.
    • Python binding updated to handle both cases, as the only found in-tree protocol consumer of the full-line text.
    • For more details see issue #840 and several pull requests referenced from it, and discussions on NUT mailing lists.
  • Build fixes:

    • In general, numerous fixes were applied to ensure portability and avoid warnings (fixing a number of real bugs that caused them); CI was extended to keep the codebase free of those types of warnings which we have got rid of, requiring builds to succeed cleanly in several dozen combinations of compiler versions, C standard revisions (C99 upwards, though on many OSes with GNU99+ extensions), operating systems and CPU architectures.
    • Public CI introduced to automatically test every contribution (PR) and resulting increment of main NUT codebase, including Travis CI and LGTM.com services, and a Jenkins farm on virtual hardware donated by Fosshost.org; this augments testing earlier provided for some branches by Buildbot.
    • Added cppunit testing with valgrind for the C++ client library
    • Make targets added for shell script syntax checks for helper and service scripts
    • Make targets added for spellcheck and for maintenance of the dictionary, including incremental spellcheck to only parse recently edited text files
    • The AsciiDoc detection has been reworked to allow NUT to be built from source without requiring asciidoc/a2x (using pre-built man pages from the distribution tarball, for instance)
    • Makefile contents rearranged for more resilient out-of-tree and in-tree builds beside those made from the root workspace directory
    • Makefiles are tested with GNU Make and BSD Make to ensure portable recipes
    • More use of pkg-config to detect dependencies at configure time, as well as fail-safe detection of presence of pkg-config (and its macros) to survive and build without it too
    • "slibtool" pedantic nuances now supported, allowing an alternative to GNU libtool
    • Build scripts updated to remove obsoleted calls to cleanly work with autoconf-2.70 releases in 2020 (also works with 2.69 which was the earlier release since 2012)
    • Dynamic library loading used in certain programs and use-cases improved, especially for 64-bit vs 32-bit builds on multiple-bitness OSes
    • Logging routines like upsdebugx() were refactored as macros so there is slightly less overhead when logging is disabled [PRs #685 and #1100]
    • Numerous classes of compilation warnings eradicated, many of those being potential issues with implicit data type conversions and varied numeric type width, signedness, string buffer size, uninitialized variables or structure fields; some more in progress
    • Several logical errors found and fixed during this walk over codebase.
    • Cases where compilers were overly zealous and particular code was written the way wit was intentionally, including some comparisons that help with different-bitness builds but indeed seem superfluous in a certain single bitness, were commented and encased in pragmas to disable the warnings
    • Basic coding style (indentations, lack of trailing white space) applied per developer guide, but not automatically enforced/checked yet.
  • Due to changes needed to resolve build warnings, mostly about mismatching data types for some variables, some structure definitions and API signatures of several routines had to be changed for argument types, return types, or both. Primarily this change concerns internal implementation details (may impact update of NUT forks with custom drivers using those), but a few changes also happened in header files installed for builds configured --with-dev and so may impact upsclient and nutclient (C++) consumers. At the very least, binaries for those consumers should be rebuilt to remain stable with NUT 2.8.0 and not mismatch int-type sizes and other arguments.
  • As usual, more bugfixes, cleanup and improvements, on both source code and documentation.

2.6. Release notes for NUT 2.7.4 - what’s new since 2.7.3

  • New class of device supported: ATS - Automatic Transfer Switch are now supported in NUT. Eaton ATS are supported, and APC ones should be too. Users are welcomed to test and provide feedback
  • NUT command and variable naming scheme:

    • Document battery.charger.status, which will in time replace the historic CHRG and DISCHRG flags published in ups.status
    • Many extensions to support outlets groups, thresholds / alarms (ambient, input, output, outlet and outlet.group)
  • support for new devices:

    • AEG PROTECT B / NAS
    • APC ATS AP7724 (should be supported)
    • Asium P700
    • Eaton ATS
    • Eaton 5E 1100iUSB
    • Eaton E Series DX UPS 1-20 kVA
    • Eaton Powerware 9125-5000g
    • Electrys UPS 2500
    • Fideltronic INIGO Viper 1200
    • Legrand Keor Multiplug
    • LYONN CTB-800V
    • Micropower LCD 1000
    • NHS Laser Senoidal 5000VA
    • Sweex model P220
    • TS Shara
    • Various APCUPSD-controlled APC devices
  • snmp-ups:

    • Improve automatic detection algorithm
    • Provide access to Net-SNMP timeout and retries
    • Proper handling of integer RW variables
    • Implement support for alarms, through ups.alarm and outlet.n.alarm
    • Improve log/debug output trace
    • Fix loss of precision when setting values, using upsrw
    • Support for outlets group management
    • Many improvements and simplification
    • Add support for Tripplite units using IETF mib
    • Improve communication staleness detection and recovery
    • Add devices MAC address publication
    • Register values enumerations, when available
    • Many improvements and fixes to the SNMP subdriver creation script
  • Eaton:

    • 3ph SNMP: Many improvements to Powerware / XUPS MIB, for data and commands Add support for Eaton Power Xpert Gateway UPS Card Improve support for temperature and humidity, including low / high values Alarms handling
    • ePDU (G2 and G3): Improve support for ambient sensor, including thresholds and dry contacts Outlet groups handling, including data, thresholds, settings and commands Alarms handling
    • XML/PDC (netxml-ups): Fix Eaton XML published data Add some settings (R/W flags) on ambient thresholds
  • bcmxcp_usb: improvements for device claiming and multi-packets responses
  • dummy-ups: allow any variable to be modified
  • libnutclient: Fix for reads when the socket was closed by NUT server
  • macosx-ups:

    • fix for 10.10 (Yosemite), v1.1
    • gracefully handle disconnection of UPS (return "data stale")
  • nutdrv_atcl_usb: point to nutdrv_qx (fuji) for 0001:0000
  • nutdrv_qx:

    • Add new sgs USB subdriver to support TS Shara units
    • various improvements and simplification, to the code and documentation
  • nut-ipmipsu: improve FreeIPMI support
  • nut-scanner:

    • Don’t depend on development libraries, by looking at some known paths, including the one provided through --libdir, to find the correct libraries
    • Fix a crash on a 2nd call to libnutscan with SNMP method
  • powercom: fix the processing of input and output voltage for KIN units
  • solis:

    • many improvements and cleanup
    • resync with end-of-packet character
    • fixes for Microsol Back-Ups BZ1200-BR
  • tripplitesu: Fix initialization when tripplite firmware is buggy (for Tripplite SU1000RT2U and possibly more)
  • usbhid-ups:

    • various minor improvements
    • support for Eaton UPS with dual HID report descriptor in HID Parser
    • handle missing USB strings in APC code
  • SSL support through Mozilla NSS: Rework the NSS tests to ensure that NSS is actually installed and usable for enabling SSL support in NUT
  • Augeas support: Augeas lens for ups.conf was updated to add various missing global directives and ups fields
  • scripts/systemd/nut-server.service.in: Restore systemd relationship since it was preventing upsd from starting whenever one or more drivers, among several, was failing to start
  • Fix UPower device matching for recent kernels, since hiddev* devices now have class "usbmisc", rather than "usb"
  • Network protocol information: default to type NUMBER for variables that are not flagged as STRING . This point is subject to improvements or change in the next release 2.7.5. Refer to docs/net-protocol.txt for more information
  • As usual, more bugfixes, cleanup and improvements, on both source code and documentation.

2.7. Release notes for NUT 2.7.3 - what’s new since 2.7.2

  • reverted POWERDOWNFLAG to /etc/killpower as in 2.6.5 (packagers may want to put this in another filesystem, though)
  • configure/make fixes for systemdsystemunitdir
  • apcsmart: fix command set parsing for protocol version 4 (e.g. Smart-UPS RT 10000 XL)
  • upslog: SIGUSR1 forces an immediate log entry
  • riello_usb/_ser: USB interface claim fix; improved error handling
  • usbhid-ups: add support for OpenUPS2 (PID: D005), Liebert GXT3 (PID: 0008) APC AP9584 Serial→USB kit (PID: 0000), and some Powercom models (PID: 0001). Fixed scaling for Cyberpower 0764:0501.
  • USB core: do not call usb_set_altinterface(0) by default
  • nutdrv_qx:

    • added fabula, fuji USB and Voltronic-QS-HEX subdrivers
    • add bestups subdriver to supersede the old standalone bestups driver
  • NUT Monitor: added FreeDesktop AppData file (including screenshots)
  • renamed udev rules file to 62-nut-usbups.rules (permissions fix)
  • added AIX packaging
  • asem: added a driver for the UPS in ASEM PB1300 embedded PCs
  • solis: updated to support APC Microsol units sold in Brazil
  • tripplite_usb:

    • updated to use dv/dq charge calculation for all models (also exposes battery_min and battery max as configuration variables)
    • added binary 3005 protocol support (such as for SMART500RT1U)
  • genericups: better debugging while parsing the cable description flags
  • all drivers: a new synchronous driver flag is available for very verbose units, such as some ePDUs
  • Eaton:

    • Add support for EnergySaving features for Eaton UPSs (HID USB/SHUT and XCP USB/serial)
    • Fix and complete Eaton ePDUs G2/G3 support
    • ABM (Advanced Battery Monitoring) support through battery.charger.status in HID (USB and SHUT), XCP (USB and serial) and SNMP (Powerware XUPS MIB)
  • support for new devices:

    • APC Back-UPS 1200BR and Back-UPS BZ2200BI-BR (Microsol)
    • ASEM SPA PB1300 UPS
    • Belkin Regulator PRO-USB
    • Cyber Power Systems Value 1500ELCD-RU
    • EUROCASE EA200N 2000VA
    • Fideltronik LUPUS 500
    • Flight Technic & International (FTUPS) FT-1000BS and FT-1000BS(T)
    • Grafenthal PR-3000-HS
    • JAWAN JW-UPSLC02
    • Lacerda New Orion 800VA
    • Mecer ME-1000-WTU
    • NHS Sistemas de Energia Expert C Online 6000/8000/10000
    • NHS Sistemas de Energia Expert S Online 6000/8000/10000
    • Powercom BNT-xxxAP (USB product id: 0001)
    • Rucelf UPOII-3000-96-EL
    • Tripp Lite OMNIVSINT800
    • Voltronic Power Apex 1KVA and Imperial 1KVA

2.8. Release notes for NUT 2.7.2 - what’s new since 2.7.1

  • This release is the second interim release of the 2.7 testing series.
  • libupsclient had undefined references related to functions of libcommon. This issue was reported on Debian (bug #731156) and is now fixed
  • support for new devices:

    • CABAC UPS-1700DV2
    • Eaton Powerware 3105
    • Emerson Network Power Liebert PSI 1440
    • MicroDowell B.Box LP 500
    • Numeric Digital 800 plus
    • OptiUPS VS 575C
    • Tripp Lite SU10KRT3/1X
  • FreeDesktop Hardware Abstraction Layer (HAL) support was removed.
  • nutdrv_atcl_usb: new driver for ATCL FOR UPS
  • al175: re-introduced this driver (actually, it was in 2.7.1)
  • upsdrvctl now provides retry options for upsdrvctl and driver(s)
  • snmp-ups: add support for XPPC-MIB and Tripp Lite SU10KRT3/1X. Also fix erroneous status in HP/Compaq SNMP MIB (with the most recent HP firmware (1.76); improved various MIBs (APC, HP/Compaq, …)
  • nutdrv_qx: add new fallback Q1 subdriver, with minimal Q1 support. General improvements on all subdrivers.
  • mge-shut: partially revert PnP/RTS change, for initializing the communication with the UPS. Note that nut-scanner similar function was not modified however.
  • FreeBSD DEVD support: generate devd.conf files for USB UPSes This adds a --with-devd-dir=PATH option to ./configure
  • The NUT website was moved to a standalone website. A separate code repository and source archive are now available.
  • As usual, more bugfixes, cleanup and improvements, on both source code and documentation.

2.9. Release notes for NUT 2.7.1 - what’s new since 2.6.5

Note

There was no public NUT 2.7.0 release.

  • This release is an interim release, part of the testing series, and the first release after the transition from Subversion to Git. The last release (2.6.5) is almost a year old. A lot of work has been done, but a good amount remains to achieve 2.8.0 goals. Please read the UPGRADING.adoc notes.
  • Added support for SSL via the Mozilla NSS library, in addition to the existing OpenSSL support.
  • Added a new driver, nutdrv_qx, for Megatec/Qx devices. This driver will eventually replace the blazer_ser and blazer_usb drivers. In particular, it adds support for Voltronic Power devices.
  • Increased USB_TIMEOUT to standards-compliant 5.000 seconds in most drivers. This should reduce the number of timeouts on low-speed USB 1.1 devices.
  • The jNut Java source has been split into a separate GitHub repository.
  • Added many devices to the HCL. Of particular note are many Tripp Lite USB HID PDC models which were tested against NUT by Tripp Lite.
  • Reworked some visual elements of the HCL. The output is better tailored for graphical and text-only browsers, but suggestions are welcome for additional accessibility enhancements.
  • Also increased timeouts and added redundant commands to improve reliability of mge-utalk driver.
  • Added the apcupsd-ups driver to interoperate with apcupsd installations.
  • Added documentation on creating subdrivers for snmp-ups and nutdrv_qx.
  • Added new drivers for the Riello UPS product line (riello_ser/riello_usb).
  • Many improvements to the BCM/XCP drivers have been merged in. This includes an improved data reception loop, and additional mappings.
  • Added a few variables to the Powercom HID mappings.
  • Updated the apcsmart driver, and renamed the previous driver to apcsmart-old.
  • Fixed the battery percentage calculation in the bestfcom driver.
  • libnutclient has been added as a C++ alternative to libupsclient.
  • Packaging files for Solaris and HP-UX (sponsored by Eaton)
  • Fix shutdown of Eaton HID, using usbhid-ups and mge-shut
  • usbhid-ups: final fix for APC Back UPS ES. APC Back UPS ES devices have buggy firmware, and this version does not cause a regression. The max_report variable should be set automatically based on the USB identification values.

    • UPDATE: known as maxreport flag for usbhid-ups driver, and as a max_report_size setting in code, as of NUT v2.8.2 release.
  • nut-scanner: fix crash
  • IPMI support can handle more different versions of FreeIPMI
  • Support power supplies scan over the network nut-scanner can now scan for power supplies with IPMI over LAN. This is currently limited to IPMI 1.5 only
  • Implement a framework to spell check documentation source files, using Aspell. This includes an interactive build target (make spellcheck-interactive), and an automated one (make spellcheck), mainly for QA / Buildbot purpose. Note that a base NUT dictionary is also available (docs/nut.dict), providing a glossary of terms related to power devices and management
  • Improve systemd integration
  • snmp-ups: Fixed a crash on outlet management, and added delta_ups MIB support. Also fixed mappings for upsBypassVoltage, upsBypassCurrent, and upsBypassPower in three-phase IETF MIB.

2.10. Release notes for NUT 2.6.5 - what’s new since 2.6.4

  • This release fixes an important regression in upssched: any upssched.conf command that takes a second argument resulted in a defective frame sent to the parent process. Thus, the command was not executed (report and patch from Oliver Schonefeld)
  • Website hosting: free NUT from Eaton website hosting NUT website (https://www.networkupstools.org) is no longer hosted by Eaton. Arnaud Quette (NUT project leader) has taken over NUT hosting on his own, to give NUT back some independence. This effort is also part of a logic to stop crediting Eaton for contributions from others (especially Arnaud Quette, as an individual). The new hosting service is located, as for Arnaud’s blog (http://arnaud.quette.fr) on Gandi servers, using PaaS. This will allow more flexibility and automation of the release process.
  • macosx-ups: new OS X Power Sources meta-driver

    • Mac OS X provides UPS status information in a format similar to what is shown for laptop batteries. This driver will convert that information into a format compatible with NUT (Charles Lepple).
  • support for new devices:

    • Eaton ePDU Switched
    • Online Zinto A (USB ID 0x06da:0x0601)
    • REDi Blazer 400VA / 600VA / 800VA
    • UNITEK Alpha650ipF and Alpha650ipE (USB ID 0x0f03:0x0001)
  • mge-shut driver has been replaced by a new implementation (newmge-shut). In case of issue with this new version, users can revert to oldmge-shut. UPDATE: oldmge-shut was dropped between 2.7.4 and 2.8.0 releases.
  • First NUT virtualization package: NUT now supports integration with VMware ESXI 5.0, through a native VIB package. This is, for the time being, an external effort from René Garcia (refer to the Download section on NUT website). But work is underway to improve this integration, and include it in the NUT source tree
  • IPMI support (nut-ipmipsu driver and nut-scanner): prepare for supporting API changes in upcoming FreeIPMI versions 1.1.x and 1.2.x.
  • snmp-ups now supports high precision values for APC, and more variables
  • the NUT variables and commands namespace has been fixed and completed, with the known and used variables that were missing.
  • more bugfixes, cleanup and improvements, on both source code and documentation.

2.11. Release notes for NUT 2.6.4 - what’s new since 2.6.3

  • This release fixes an important vulnerability in upsd (CVE-2012-2944: upsd can be remotely crashed) NUT server (upsd), from versions 2.4.0 to 2.6.3, are exposed to crashes when receiving random data from the network. This issue is related to the way NUT parses characters, especially from the network. Non printable characters were missed from strings operation (such as strlen), but still copied to the buffer, causing an overflow. Thus, fix NUT parser, to only allow the subset of ASCII charset from Space to ~ (Reported by Sebastian Pohle, Alioth bug #313636, CVE-2012-2944) A separate patch, which applies to any faulty version, is also available: http://trac.networkupstools.org/projects/nut/changeset/3633 For more information, refer to the Common Vulnerabilities and Exposures: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2944
  • A static source code analysis has been done by Michal Hlavinka from RedHat, using Coverity (12 issues fixed).
  • Add new "LIST CLIENTS" and "NETVER" commands to NUT network protocol. "NETVER" allows to retrieve the Network protocol version, while "LIST CLIENTS" provides the list of clients connected to a device. Refer to the developer guide, "Network protocol information" section for more information.
  • Support of ranges of values for writable variables has been added, to complete the existing enumerated values mechanism. This will start to appear in some drivers soon, beginning with Eaton. Refer to the developer guide, "Creating a new driver…" section for more information.
  • PyNUT.py has been updated to version 1.2.2, adding support for LIST CLIENTS, FSD, HELP and VER (Rene Martín Rodríguez)
  • support for new devices:

    • AEG Power Solutions PROTECT HOME
    • more APC SNMP cards
    • ATEK Defensor range
    • all Borri models
    • all COVER ENERGY SA
    • CyberPower OR700LCDRM1U, PR6000LCDRTXL5U and CP1000PFCLCD
    • Dell UPS Network Management Card
    • Dynamix 1000VA USB
    • Eaton Management Card Contact (ref 66104)
    • EVER POWERLINE RT / 11 / 31 and DUO II Pro
    • GE Digital Energy GT Series 1000-3000 VA
    • Gtec models
    • all recent HP serial / USB UPS (G2, G3 and R/T models, ) and HP UPS Management Module
    • Ippon INNOVA RT
    • KOLFF BLACK NOVA
    • Lexis X-power Tigra 1kVA
    • Microline C-Lion Innova
    • Online Yunto YQ450
    • PowerShield Defender 1200VA
    • PowerWalker Online VFI LCD, Line-Interactive VI LCD and Line-Interactive VI
    • Riello Netman Plus 102 SNMP Card
    • Tripp-Lite OMNISMART500
  • apcsmart has received some fixes to work better on Mac OS X, and in general
  • bcmxcp has improved support for battery status, and better supports PW9120 units
  • bestfortress has improved Best Fortress LI675VA support
  • blazer_ser and blazer_usb now try to automatically estimate high and low voltages, to be able to calculate battery charge; support for online Innova UPS (T, RT and 3/1 T) has been added; Best UPS support has been improved, to prepare for superseding bestups driver
  • bestups has also received some care, though users are encouraged to switch to blazer_ser, since bestups will soon be deprecated.
  • newmge-shut has been heavily improved. However, replacement of the current mge-shut has been postponed to the next release, due to the CVE issue.
  • oneac 0.80 improves support for all families of Oneac (EG, ON, OZ and OB), including more data and instant commands (Bill Elliot).
  • usbhid-ups: for Eaton devices, ups.start.auto is now automatically adjusted for shutdown.{return,stayoff} to behave as expected; Liebert firmwares with incorrect exponents have also been addressed.
  • snmp-ups now provides support for UPS shutdown, based on usbhid-ups mechanisms (composite commands and fallback). Composite commands are also supported now. This means, for example, that if shutdown.return is not supported, a combination of load.off + load.on may be used; Actual validity of instant commands is now tested before commands addition; Eaton/MGE MIB has been cleaned and completed; 3-phases support has been added to Socomec Netvision MIB; HP/Compaq MIB has been completed, with thresholds, nominal values and more commands.
  • nut-scanner now also has libupsclient has a weak runtime dependency; more docs and bugfixes have also happened.
  • Provide an Uncomplicated Firewall (UFW) profile (nut.ufw.profile)
  • Riello protocols have been officially published in NUT protocols library: https://www.networkupstools.org/ups-protocols.html#_riello
  • Duplicate instances of upsd / upsmon are now detected upon startup
  • NUT variables namespace has been completed with missing variables and commands that are already known and standard
  • upslog now comes with a companion file, for logrotate configuration
  • more devices embed NUT for power protection, now including Thecus NAS range
  • more bugfixes, cleanup and improvements, on both source code and documentation, with a good bunch from Greg A. Woods.

2.12. Release notes for NUT 2.6.3 - what’s new since 2.6.2

  • nut-scanner is now more portable, and provides more coherent option names. IPMI support has also been added, to discover local power supplies. This version brings weak runtime dependencies in libnutscan, which allows to compile nut-scanner with all options and to run according to the available dependencies (USB, SNMP, IPMI, …).
  • libnutscan now provides pkg-config support and the needed header files are distributed. Some documentation is also available in the developer guide and manual pages have been updated and completed.
  • support for new devices:

    • Cyber Power Systems with SNMP RMCARD (100, 201, 202 and 301)
    • Dynamix 650VA USB
    • LDLC UPS-1200D
    • Tecnoware UPS ERA LCD 0.65
    • Powercom BNT-xxxAP (USB ID 0d9f:0004)
    • Various USB devices using UPSilon 2000 software
  • apcsmart has received minor correction.
  • bcmxcp_usb now handles disconnection issues and reconnection mechanism.
  • blazer_usb enables again inclusion of buggy USB Device and Vendor IDs in udev rules file; language ID support has been added for USB units from LDLC, Dynamix and other no names.
  • nut-ipmipsu has also received some improvements.
  • snmp-ups has fixed outlets reported current in aphel_genesisII MIB; MGE 3 phases handles better low battery condition; support for Cyber Power Systems with SNMP RMCARD has been added; support of the newer Eaton ePDUs has been improved.
  • upsd doesn’t anymore fail to start if at least one of the listening interface is available. This is needed on systems where either IPv4 or IPv6 is disabled, and no explicit LISTEN directive has been specified.
  • Avahi support is now automatically enabled, upon detection
  • jNut (NUT Java interface) adds device discovery support, through a nut-scanner wrapper; jNutWebAPI, a HTTP/JSON web service interface, has also been added to interact with upsd and nut-scanner.
  • Base files for HPUX packaging have been added. This is still a work in progress.
  • Compilation on IBM AIX has been fixed (namespace conflict with ctypes).
  • more bugfixes, cleanup and improvements, on both source code and documentation.

2.13. Release notes for NUT 2.6.2 - what’s new since 2.6.1

  • NUT can now monitor power supply units (PSU) in servers, through IPMI, using the new experimental nut-ipmipsu driver. Users are encouraged to test it, and send feedback and debug output to the development mailing list. This requires GNU FreeIPMI (0.8.5 or higher) development package or files. Thanks goes to Al Chu, FreeIPMI project leader, for his help during this development.
  • NUT now provides a tool, called nut-scanner, to discover supported devices, both local and remote. nut-scanner will help to ease the configuration step, and power infrastructure discovery. This development, sponsored by Eaton, supports the following methods:

    • USB,
    • SNMP,
    • XML/HTTP (from Eaton),
    • NUT servers, using the classic connect or Avahi / mDNS methods. IPMI support will be added in the next release. A separate library, called libnutscan, is also available to provide these feature. Future NUT releases will provides binding for the supported languages (Perl, Python and Java).
  • NUT now provides a Java interface called jNut. This development, sponsored by Eaton, is currently limited to the client interface. But it will be broaden to device discovery and configuration in the future. For more info, refer to nut/scripts/java/README, or the developer guide (chapter Creating new client). Javadoc documentation is also provided, along with Java archives (.jar) in the Download section.
  • support for new devices:

    • Eaton 3S
    • Cyber Power Systems CP1000AVRLCD
    • various APC models equipped with APC AP9618 management card, including APC Smart-UPS RT XL
    • Orvaldi 750 / 900SP
    • POWEREX VI 1000 LED
    • PowerWalker VI 850 LCD
    • SVEN Power Pro+ series (USB ID ffff:0000)
  • A regression has been fixed in udev rules file. This previously caused permission issues to owners of some USB devices.
  • Avahi support has been added, for NUT mDNS publication, through a static service file (nut/scripts/avahi/nut.service).
  • usbhid-ups has had Eaton completion: some features have been improved, such as output.voltage.nominal; 3S Eco control support has been added, along with battery.runtime.low and end of battery life (life cycle monitoring) support; new measurements for 5 PX are also supported now (outlet power factor, power, real power and current).
  • apcsmart has been updated to support more variables and features; the previous driver is however still available as apcsmart-old, in case of issues.
  • bcmxcp now supports per outlet startup and shutdown delays setting; shutdown delay is also used, when available, for outlet.n.shutdown.return instead of the default 3 seconds.
  • snmp-ups.c has a new initialization method, that uses sysObjectID, which is a pointer to the preferred MIB of the device, to detect supported devices. This speeds up even more init stage and should render void the use of mib option. SNMP v3 session initialization has also been fixed, and Eaton PDU support has been completed.
  • Initial support has been added for systemd, the System and Service Manager from RedHat.
  • The chapter NUT configuration management with Augeas of the developer guide has received some completion: a complete Python Augeas example code is now provided.
  • Finally, after years of dedication to NUT, Arjen de Korte is now retired. Sincere thanks to you Arjen from us all.

2.14. Release notes for NUT 2.6.1 - what’s new since 2.6.0

  • the various recent USB regressions have been definitely fixed.
  • NUT now propose a variable to expose UPS efficiency (ups.efficiency). Eaton 5 PX already uses it.
  • the Perl module from Gabor Kiss (rewritten from Kit Peters') is now distributed with NUT source code.
  • support for new devices:

    • Eaton Ellipse ECO, Powerware 9140, Eaton 5 PX, and ambient sensor on Eaton ePDU managed
    • GE EP series
    • Inform Sinus SS 210
    • IPAR Mini Energy ME 800
    • Mustek Yukai PowerMust 1000 USB
    • Numeric 3000 SW
    • SVEN Power Pro+ series (recent models)
    • Vivaldi EA200 LED
  • liebert-esp2: Improved Liebert ESP II support, including UPS shutdown (poweroff), 1 and 3-phase input and output variables, and most input / output / bypass / nominal variables. There is also a fix for the USB to serial cable (Farkas Levente and Spiros Ioannou).
  • powercom has improved PowerCom BNT 1500A and BNT-other support, along with driver documentation and code conformance to the NUT rules (Keven L. Ates).
  • apcsmart has more improved UPS poweroff support and options (Michal Soltys).
  • blazer has also seen some improvements.
  • usbhid-ups has completed a bit supported variables for APC and Eaton / MGE.
  • on the quality assurance side, Eaton has worked on fixing a few non-conformance issues, like C++ style comments and warnings, using a newly developed verification tool (Prachi Gandhi).
  • fix remaining references to LIBSSL_LDFLAGS, instead of LIBSSL_LIBS, which cause unresolved symbol on libupsclient users (Fabrice Coutadeur).
  • the website has now a better support for Internet Explorer 6.
  • graphic illustrations, used for the Features page on the website Features and chapter of the user manual, have been refreshed (courtesy of Eaton).
  • more bugfixes, cleanup and improvements, on both source code and documentation.

2.15. Release notes for NUT 2.6.0 - what’s new since 2.4.3

Note

Per original semantic versioning, there were no public NUT 2.5.x releases.

  • the main focus of this release is the complete documentation revamping, using AsciiDoc. This includes a new website, user manual, developer guide, packager guide and manual pages, available in various formats (single and multiple pages HTML, and PDF at the moment). Be sure to check the --with-doc option help of configure script, and docs/configure.txt for more information.
  • Add Augeas support, to provide easy NUT configuration management, through tools and development APIs. For more information, refer to the developer guide, or scripts/augeas/README.adoc in the source directory.
  • support for new devices:

    • APC 5G
    • Eaton PowerWare 5119 RM (smart mode using upscode2 driver)
    • Eaton Best Ferrups (using older ConnectUPS card)
    • Eaton 9395 (serial interface)
    • Eaton ConnectUPS X / BD / E Slot
    • HP T1000 INTL
    • HP T1500 INTL
    • HP T750 G2
    • HP R1500 G2 INTL
    • iDowell iBox UPS
    • Tripp Lite SmartOnline SU1000XLA
    • Tripp Lite Smart1000LCD
    • and some more USB/HID devices IDs
    • CyberPower CP1500AVRLCD and CP1350AVRLCD
    • PowerWalker Line-Interactive VI 1400
    • Rocketfish RF-1000VA / RF-1025VA
  • usbhid-ups has better support for shutting down APC SmartUPS RM series, and finally fix the "buffer size" issue, which was breaking some devices data retrieval, or truncating some data on others.
  • snmp-ups now support SNMP v3 and its security parameters. IETF MIB support has also been extended.
  • fix dummy-ups simulation driver status handling bug, and add the capability to remove exposed variables on the fly.
  • the belkin driver now support control commands and status reporting for beeper and battery test.
  • the powerpanel driver supports more older CyberPower units.
  • mge-utalk, upscode2, blazer and liebert-esp2 have also received some care, and been improved.
  • NUT-Monitor and the PyNUT client module have been updated to 1.3, adding more features like automatic connection to the first local device and i18n support.
  • improve configure time dependencies checking and processing.
  • improve older Unix systems support (HP-UX, AIX, …) for missing functions.
  • refresh and improve USB helper files (udev and UPower).
  • more generation automation: the ChangeLog file is now generated automatically at distribution time, along with the files needed for the website hardware compatibility list.
  • SSL support has also received some improvements.
  • tcp-wrapper now allows hostnames in /etc/hosts.allow too (not only IPv4 and/or IPv6 addresses).
  • many bugfixes, cleanup and improvements.

2.16. Release notes for NUT 2.4.3 - what’s new since 2.4.2

  • this is a bugfix release that only solves the regression on IPv6 activation.

2.17. Release notes for NUT 2.4.2 - what’s new since 2.4.1

  • the general USB support has been vastly improved, including many bug fixes, better OS support, new features and devices.
  • NUT now talks to Solar Controller Devices with the new ivtscd driver.
  • the snmp-ups driver supports more PDU, with a smaller disk footprint.
  • apcsmart supports more older SmartUPS and Matrix units.
  • the bestfortress driver is resurrected.
  • the virtual driver has been renamed to clone.
  • the netxml-ups driver has received some care.
  • various debugging and development improvements have been done, around driver output; dummy-ups with more interaction and scripting and the device-recorder.sh script.
  • the build system has received many bugfixes and improvements.
  • the UPower (previously known as DeviceKit-power) rules file is now generated by NUT.
  • support for new devices:

    • Apollo 1000A and 1000F
    • various Baytech RPC
    • old Best Power Fortress
    • Cyber Power Systems PR3000E, CP 1500C and OR2200LCDRM2U
    • all the new Dell UPS range (serial, USB and network)
    • Eaton E Series NV and DX UPS, and Powerware 9130
    • older HP T500 and T750, newer T750 INTL (USB) and R1500 G2 (serial)
    • Inform Informer Compact 1000VA
    • many serial and USB devices from Ippon, like Back Comfo Pro, Smart Power Pro and Smart Winner
    • IVT SCD series
    • Liebert GXT2-3000RT230 and PowerSure PSA
    • Mustek PowerMust 424 / 636 / 848 USB
    • all new PowerCOM USB devices with HID PDC interface
    • Tripp-Lite INTERNETOFFICE700, SMART700USB and ECO550UPS
    • UPSonic DS-800 (USB)

2.18. Release notes for NUT 2.4.1 - what’s new since 2.4.0

  • the microdowell driver has appeared to support various MicroDowell Enterprise units (see the "new devices" list below).
  • support for new devices:

    • MicroDowell Enterprise B8, B10, N8, N11, N15, N20, N22, N30, N40, N50, N60 and HiBox ST.
  • NUT-Monitor now better handles the ups.status field, and has switched to version 1.1.
  • the situation of the build toolchain has been fixed, with regard to the "make clean" target and the wrongly removed generated USB files. This broke further configure call.

2.19. Release notes for NUT 2.4.0 - what’s new since 2.2.2

Note

Per original semantic versioning, there were no public NUT 2.3.x releases.

  • preliminary support for Power Distribution Units (PDUs): NUT can now support PDUs, either natively (ie using NUT snmp-ups driver), or through a binding to the Powerman daemon. The list of supported PDUs is already quite long, including:

  • support for new devices:

    • the various PDUs cited above
    • Chloride Desk Power 650
    • Cyber Power Systems Value 400E/600E/800E (USB models)
    • Delta GES602N
    • Digitus DN-170020
    • the whole Eaton ranges (mostly composed of MGE Office Protection Systems and Powerware units) including BladeUPS
    • Forza Power Technologies SL-1001
    • HP PowerTrust 2997A
    • HP R/T 2200 G2
    • Infosec XP 1000 and XP 500
    • Ippon Back Power Pro (serial and USB)
    • Kebo 1200D/D Series
    • Liebert PowerSure Personal XT
    • MGE Office Protection Systems Protection Station
    • Neus 400va and 600va
    • Phasak 400VA and 600VA
    • Plexus 500VA
    • Powercom Black Knight PRO / King PRO and Imperial
    • PowerKinetics BlackOut Buster
    • Sweex 1000 USB
    • UNITEK Alpha 500
    • WinPower CPM-800
  • NUT now embeds Python client support through the PyNUTClient module and the NUT-Monitor application. Both are from David Goncalves, and are still available from http://www.lestat.st. For more information, refer to scripts/python/README.adoc.
  • the dummy-ups driver now supports a "repeater" mode. This allows it to act as a NUT client, and to forward data. This can be useful for supervision and load sharing purposes.
  • tcp-wrappers support has been added to the upsd server, to grant users access by source IP for commands that require to be logged into the server. This replaces the previous internal implementation (ACL in upsd.conf).
  • the nut.conf file has been introduced to standardize startup configuration across the various systems.
  • NUT now ships a bash completion function for upsc command (scripts/misc/nut.bash_completion). Simply copy it to /etc/bash_completion.d
  • many internal changes to improve maintainability, while lowering the maintenance cost (thus allowing developers to focus on what matters: the code!). Examples of this are:
  • the USB information automatic extraction to generate the various USB helper files,
  • the upsdrv_info_t structure to track more driver information, and remove the need for the upsdrv_banner() function
  • common USB code refactoring, as it is done for the serial functions.
  • tons of bugfixes, cleanup and improvements to make NUT stronger than ever!

2.20. Release notes for NUT 2.2.2 - what’s new since 2.2.1

  • support for new devices: APC BACK-UPS XS LCD, Atlantis Land, Mustek Powermust Office 650, Oneac XAU models, Powerware PW5115 and PW9120 (USB), Nitram Elite 2005
  • Integrated Power Management (NUT HAL integration) has reached a major milestone: it is now the most advanced UPS integration into Power Management layer known in existing OSs. It has received many corrections and improvements, and allows to PowerOff the UPS at the end of a power cycle (which is the most important feature, not supported on other systems). The various files are now installed into the correct location.
  • the usbhid-ups driver has received attention. Most notably, the shutdown handling has been reworked, and support for MGE UPS SYSTEMS 3 phases units has been added.
  • snmp-ups now supports MGE* Environment Sensor (ref 66 846). The ambient.temperature reporting has also been fixed for units other than APC.
  • the netxml-ups driver has appeared to support MGE* network HTTP/XML cards.
  • NUT now distributes by default the shared version of libupsclient (version 1.0.0), and use this for the provided clients (upsmon, upsc, upsrw, upscmd). This is part of an effort to reduce NUT’s footprint, both on disk and in memory.
  • powerpanel has reach a new step toward the replacement of nitram and cpsups drivers. The final step is scheduled for NUT 2.4.
  • many changes, cleanup and fixes to the NUT core and various drivers.

2.21. Release notes for NUT 2.2.1 - what’s new since 2.2.0

  • support for new devices:

    • all MGE Office Protection Systems units
    • Advice TopGuard 2000
    • Belkin F6H375-USB
    • Dynamix UPS1700D
    • Effekta RM2000MH,
    • Jageson Technology Jasuny USPS
    • Powercom SMK-1500A and SXL-1500A
    • PowerWalker Line-Interactive VI 400/800 and 600
    • Powerware 9110
    • UNITEK Alpha 2600
    • UPSonic CXR1000
    • some vintage serial APC UPSs
  • the usbhid-ups driver has been improved, and fixed in many areas, through a backport of the development (trunk) version.
  • the udev rules, for Linux hotplug support of the USB UPSs, has been updated to support kernel newer than 2.6.22.
  • the megatec and megatec_usb drivers have also been backported from the development (trunk) version.
  • the client development files have also received some care: the upsclient pkg-config file has been fixed, and the upsclient.h file allows older NUT clients to continue using the UPSCONN structure.

2.22. Release notes for NUT 2.2.0 - what’s new since 2.0.5

Note

Per original semantic versioning, there were no public NUT 2.1.x releases.

  • The new build infrastructure, using automake, is now used. This has major impact on the compilation and installation procedures, and thus on the NUT packaging. For more information, refer to UPGRADING.adoc and packaging/debian/ for an example of migration.
  • NUT now provides support for FreeDesktop Hardware Abstraction Layer (HAL) which brings full Plug And Play experience to USB UPS owners. For more information, refer to docs/nut-hal.txt.
  • support for new devices:

    • Ablerex 625L
    • ActivePower 400VA, 2000VA;
    • Belkin Home Office F6H350-SER, F6H500-SER, F6H650-SER
    • Belkin Office Series F6C550-AVR
    • Belkin Universal UPS F6C100-UNV (USB), F6C1100-UNV (USB), F6C1200-UNV (USB), F6H350deUNV (serial), F6H350ukUNV (serial), F6H650ukUNV (serial)
    • Compaq R3000h
    • Cyber Power Systems PR2200
    • Dynex DX-800U
    • Geek Squad GS1285U
    • Krauler UP-M500VA
    • Mecer ME-2000
    • MGE UPS SYSTEMS Ellipse MAX
    • Online Zinto D
    • PowerTech SMK-800
    • SVEN Power Pro+ series
    • Power Smart RM 2000
    • Tripp-Lite SmartOnline SU1500RTXL2ua, smart2200RMXL2U.
  • added IPv6 support,
  • the newmge-shut driver has appeared. This one uses the same HID core as usbhid-ups, but communicate over a serial link. It will eventually replace the current mge-shut driver.
  • client commands (upsc, upsrw and upscmd): hostname is now optional, and defaults to "localhost"
  • many drivers have been improved and have received bug fixes: powerpanel, megatec, megatec_usb, safenet, tripplite_usb, gamatronic,
  • the hotplug and udev scripts, in charge of setting the right permissions on the USB devices, are now installed automatically when appropriate.
  • more generally, the NUT core and documentation, including the manpages, have been improved and updated.

2.23. Release notes for NUT 2.0.5 - what’s new since 2.0.4

This release is a backport of the development version. Many changes have already been backported previously. Thus it is more a synchronization release, though it includes many bugfixes and support for new models.

  • support for new devices:

    • APC Smart-UPS with 6TI firmware
    • Belkin Small Enterprise F6C1500-TW-RK
    • Compaq R3000 XR, R5500 XR
    • Cyber Power 550SL, 725SL, 685AVR, 800AVR, 1200AVR, AE550
    • Eltek
    • Inform GUARD
    • Microsol Rhino
    • Opti-UPS PowerES 420E
    • PowerMan RealSmart, BackPro
    • Powerware PW9315 3-phase
    • SOLA 305
    • Tripp-Lite SMART550USB, SMART2200RMXL2U, OMNI1000LCD, OMNI900LCD, OMNI650LCD, 1500 LCD, AVR550U
    • Viewsonic PowerES 420E
  • bcmxcp: added 3-phase support
  • megatec: better hardware support, more instant commands
  • mge-hid: support more instant commands
  • newhidups: fixed APC and Tripp Lite bugs, various memory bugs, improved report buffering, improved Solaris support, added -x explore option for easy diagnosis of new devices
  • solis: shutdown programming, support new cables, Solaris support
  • tripplite_usb: updated SMARTPRO support, fixed OL/OB reporting, better error handling, some memory bugs
  • new dummy-ups driver simulator
  • added HTML interface for access to CGI scripts

2.24. Release notes for NUT 2.0.4 - what’s new since 2.0.3

  • The newhidups critical bug (segmentation fault) has been fixed. It has also received some more care, like bugfixes and new models support and enhancement for Solaris. [Peter Selinger and Arnaud Quette]
  • A bug has been fixed in NUT core to support resuming from suspend-to-disk. This should also fix other similar issues, like time synchronization through the NTP - Network Time Protocol. [Arjen de Korte]
  • The mge-shut driver now better detects the Low Battery status, support new models and fixes some wrong status and data. It also fixes some issue where the UPS wasn’t restarting (refer to mge-shut manpage). [Arnaud Quette]
  • The genericups custom configuration through ups.conf is working again [Arjen de Korte]
  • The genericups driver type 22 also support CyberPower 725SL (and maybe others SL models) [David Kaufman]
  • The new megatec driver, which will replace a bunch of drivers by nut 2.2 (refer to docs/megatec.txt and UPGRADING.adoc) has been backported from the trunk (Development tree). The powermust driver has also received some attention. [Carlos Rodrigues]
  • The new rhino driver was added to support Microsol Rhino UPS hardware The solis has also been improved for Solaris compatibility, and internal / external shutdown programming. solis can now save external shutdown programming to ups, and support new cables for solis 3 [Silvino B. Magalhães]
  • Several fixes and improvements have been made to upsrw, upsset, cpsups, tripplite_usb and the FAQ. [Arjen de Korte and Charles Lepple]

2.25. Release notes for NUT 2.0.3 - what’s new since 2.0.2

  • The recent and major newhidups changes have been backported from the Development tree. It now:
  • supports models from MGE UPS SYSTEMS, APC and Belkin. Mustek and Unitek units are also recognized for development purpose,
  • handles better device reopening, after a disconnection,
  • handles multiple devices, with several parameters to find the right UPS. [Peter Selinger, Charles Lepple and Arnaud Quette]
  • The bcmxcp_usb driver has been added to support Powerware USB units. [Wolfgang Ocker and Kjell Claesson]
  • The tripplite_usb driver has been added to support Tripp Lite USB units. [Charles Lepple]
  • The sec driver is back as gamatronic [Gamatronic, Nadav Moskovitch]
  • The genericups driver has received official care from Gamatronic to add support for the Gamatronic UPS with alarm interface. [Gamatronic, Nadav Moskovitch]
  • The powermust driver now supports Soyntec Sekury C 500 and C 800 units. [Hanno Borns]
  • The mge-shut driver has received a bit of attention too, and enhance ups.model retrieval for some specific case (release 0.65)
  • The drivers don’t change to the "statepath" directory anymore at initialization time if called using -k. This avoid unneeded failure to poweroff the UPS if /var is already unmounted. [Gaspar Bakos]
  • The belkinunv driver now supports Belkin F6C1100-UNV [Dave Breiland]
  • The isbmex driver has been upgraded to version 0.05, which fixes various errors in formulas, add shutdown capability and revert back baudrate to B9600 (instead of B2400), as it broke the communication [Ricardo Martinezgarza]
  • The support of Sysgration UPGUARDS Pro650 in fentonups has been fixed [Simon J. Rowe]
  • The packaging files for Red Hat have received various fixes [Thomas Jarosch]
  • The solis driver has been fixed to avoid a naming collision and compile on Solaris [Paweł Kierdelewicz]
  • The snmp-ups driver has corrected the problem when exposing certain time data.

2.26. Release notes for NUT 2.0.2 - what’s new since 2.0.1

  • the newhidups USB driver has been improved a lot and is no more experimental. It also now has a basic APC support, which will soon replace the legacy hidups driver.
  • The mge-utalk driver has improved its support for old units.
  • The mge-shut driver has been improved for restart/shutdown sequences which was previously blocking the serial port.
  • The general MGE support has been added Pulsar EXtreme C / EX RT, Comet EX RT, Pulsar SV, Pulsar PSX, Ellipse Office and NOVA AVR USB.
  • The genericups driver now supports Generic RUPS 2000, AEC MiniGuard UPS 700 (using Megatec M2501 cable), and Powerware 3110. [Nick Barnes, Paul Andreassen]
  • The powermust driver now supports SquareOne Power QP1000, Mustek PowerMust 1400VA Plus and 2000VA USB. [Carlos Rodrigues]
  • The fentonups driver has been enhanced and now supports Sysgration UPGUARDS Pro650. [Michel Bouissou, Simon J. Rowe]
  • The cpsups driver now supports MicroDowell B.Box BP 500/750/1000/1500. [Armin Diehl]
  • The snmp-ups driver now supports Socomec SNMP devices (Netvision MIB), and Powerware ConnectUPS SNMP cards. [Thanos Chatziathanassiou, Olli Salvia]
  • The bcmxcp driver is back with support for Powerware UPSs. [Tore Ørpetveit, Kjell Claesson]
  • The cyberpower driver now supports CyberPower 1000AVR. [Dave Huang]
  • The new solis driver supports Microsol units: Solis 1.0, 1.5, 2.0 and 3.0. [Silvino B. Magalhaes]
  • The apcsmart driver has fixed APC600 support.
  • The etapro driver fixes brokenness due to ser_get_line use [Marek Michalkiewicz]
  • The new upscode2 driver supports Fiskars, Compaq and Powerware devices. [Niels Baggesen, Havard Lygre]
  • The tripplite driver has fixed a battery charge bug [Cedric Tefft]

2.27. Release notes for NUT 2.0.1 - what’s new since 2.0.0

  • The bestuferrups driver has been forked into the new bestfcom driver which has better handling of the inverter status alarm messages and more. [Kent Hill]
  • Mustek UPS support returns with two drivers which have overlapping coverage: mustek and powermust. [powermust: Carlos Rodrigues, mustek: Martin Hajduch]
  • Additional CyberPower Systems hardware is supported with the new cpsups driver. Three recognized models are the CPS1500AVR, CPS1100VA, and OP500TE. [Walt Holman, Brad Sawatzky]
  • The genericups driver can now generate staleness warnings in specific cases where the UPS provides a way to test for its presence. See the "CON" setting in ups.conf for more details. [stan / saticed.me.uk]
  • Documentation for monitoring a Back-UPS RS 500 on a system without USB ports has been added to the cables directory. [Martin Edlman]
  • The everups driver now supports types 73-76 (NET 700/1000/1400/500-DPC) [hunter]
  • The new metasys driver supports Meta System models: Line, HF Millennium, HF Top Line, ECO Network, ECO, Ally HF, Megaline [BlaXwan]
  • The ippon driver now allows user-defined settings for the delay before switching off, and the delay before powering on. [Yuri Elizarov]
  • The victronups driver is now at version 0.1.9, which adds many instant commands: calibration control, battery and front panel tests, and bypass control. [Gert Lynge]
  • The tripplite driver has received a major overhaul to bring it up to working condition for the 2.0 tree, including code cleanups, several new variables, commands, and user-definable parameters. See ChangeLog for more. [Nicholas J Kain]
  • The mge-utalk driver has been upgraded to version 0.81, which fixes the lack of read-write variables and loss of sync on models which don’t support restoring settings. [Arnaud Quette]
  • The Micro Ferrups model RE is now supported by the bestuferrups driver. The driver will also now read the ambient temperature and will no longer constantly report the data as stale. [Tim Thompson]
  • The fentonups driver’s init sequence has been reworked to work better with some hardware, including a fix to the parser code. [MLH]
  • A workaround has been added to the hidups driver to avoid variables which are stuck by calling HIDIOCINITREPORT in every poll. [Stuart D. Gathman]
  • SOLA 610 UPS hardware and others which do not support the ID command may now be monitored by the bestups driver after forcing ID= in ups.conf. [Jason White]
  • "pollinterval" is now available via driver.parameter for consistency. [Arnaud Quette]
  • The mge-shut and newhidups drivers, along with the supporting hidparser/libhid code have received many updates, including lowering USB bandwidth consumption, driver unbinding (only in Linux), code cleanups, and more which can be seen in the ChangeLog file. [Arnaud Quette]
  • The fentonups driver now recognizes several more Megatec protocol units:

    • SuperPower HP360, Hope-550 [Denis Zaika]
    • Unitek Alpha 1000is [Antoine Cuvellard]
  • Some variables like uc_sigmask were renamed to avoid clashes with symbols on systems like HP/UX.
  • All man pages have been reworked to switch literal "-" characters to hyphens or "\-" as appropriate. [Shaul Karl]
  • upssched’s CANCEL events were broken following the change to text-based socket messages in 1.5 and have been fixed. [Steven Schoch]
  • Calls to varargs functions with raw strings from the config files without an intervening "%s" have been fixed in upsmon, upssched, snmp-ups and upsd. [Ulf Harnhammar]

2.28. Release notes for NUT 2.0.0 - what’s new since 1.4.x

  • The new naming scheme for variables and commands (introduced in 1.4) is now mandatory. The 1.4 tree supported both the old (STATUS) and the new (ups.status) as a transitional release, and now that time is over. This means that 2.0 is generally smaller than 1.4 code, since the interim compatibility hacks have been removed.
  • New serial handling code has been added, with greatly simplified operations. The old mess involving repeated calls to sigaction, alarm, and read has been condensed to a select-read loop. This change allows drivers which don’t do any serial communications at all (hidups, snmp-ups) to drop that baggage, so they are a bit smaller when compiled.
  • The drivers now recognize "chroot=' and user= in the global section of ups.conf. This means you don’t have to use -r and -u when starting upsdrvctl.
  • upsmon now supports the -K argument to check for the presence of the POWERDOWNFLAG file. If it exists and contains the magic string, then upsmon will exit(EXIT_SUCCESS). Otherwise, it will exit(EXIT_FAILURE). This feature can be used to simplify shutdown scripts, since now you don’t have to keep the script in sync with the upsmon.conf.
  • Many small things like signed value comparisons, int vs. size_t and proper use of const/struct were fixed throughout the source. These were mostly for correctness, but a few potential bugs involving very big or very small numbers were fixed at the same time.
  • The access control system in upsd.conf has been reworked and simplified. Since access levels have become meaningless in recent releases, the new system is just ACCEPT <acl> or REJECT <acl>. If you are upgrading from a previous version of the software, you will have to edit your upsd.conf to use this method. See the UPGRADING.adoc file for more details.
  • The build process now halts when make fails in one of the subdirectories. [Petter Reinholdtsen, Charles Lepple]
  • Helper data for using upsclient via pkgconfig is now created if pkgconfig is detected when configure runs. [Arnaud Quette]
  • The polling interval in drivers may now be set with pollinterval in ups.conf. [Gabriel Faber]
  • Blazer UPS equipment is now supported with the blazer driver. [Phil Hutton]
  • Energizer USB UPS hardware is now supported on Linux with a new experimental driver. [Viktor T. Toth]
  • The newhidups driver has been merged as the first step towards portable USB UPS support. This will eventually replace the old Linux-only hidups driver. The newhidups driver is tagged experimental since it is under active development. [Arnaud Quette, Charles Lepple]
  • The newapc driver has been renamed to apcsmart, replacing the old driver with that name. If you used the newapc driver, be sure to delete the old binary and fix your ups.conf.
  • The apcsmart driver now supports asynchronous notification data from the hardware, which means it can wake up as soon as something happens. This affects the OL/OB/LB/RB data in ups.status, and generally reduces the latency in dispatching status changes by a few seconds.
  • The apcsmart driver can now support quirky hardware which does not provide the usual listing of valid command characters. This feature is necessary to monitor new models like the APC CS 350 and old ones like the Matrix 5000. It also now has sdtype=4 to handle the strange shutdown behavior on the CS series.
  • The belkin driver now works around broken firmware version 001, avoiding a lengthy delay at startup. It also implements the shutdown sequence differently, and should actually work on more hardware now.
  • The bestups driver has been slowed down to play nicer with the hardware, and is much more reliable as a result. Among other things, it should always detect the UPS on the first try, meaning no more "dot dot dot" when it starts.
  • The cyberpower driver is no longer tagged experimental, and now supports powering off the load. It also supports battery tests via instcmds.
  • Effekta MT 2000 RM hardware is now supported by the fentonups driver. [Christoph Moar]
  • The new safenet driver supports UPS hardware that uses the protocol of the same name. This includes models from many manufacturers, including Fairstone, Fenton, Gemini, Powerwell, Repotec, Soltec and Sweex. See the README or driver.list for the full details. [Arjen de Korte]
  • The genericups driver now has type 20 to monitor the Powerware 5119 RM. See http://lists.exploits.org/ups/Oct2003/00052.html. [Daniel Thompson]
  • The belkinunv driver has been added to allow monitoring Belkin Universal UPS hardware. [Peter Selinger]
  • Cyber Power Systems 1100AVR hardware which has a different protocol than the existing binary type (supported by cyberpower) is now supported by the experimental cyberpower1100 driver. [Walt Holman]
  • upsdrvctl now returns success or failure information in the exit code. Any failure during a requested operation will result in a nonzero value (specifically EXIT_FAILURE).

2.29. Release notes for NUT 1.4.0 - what’s new since 1.2.x

  • The drivers and upsd now communicate over Unix domain sockets instead of state files, shared memory, or state files with mmap. This change makes many things possible, including the new dynamic variable and command naming scheme described below. There is a new development tool called sockdebug in the server directory for debugging driver-server communications on the sockets.
  • The old static variable scheme has been replaced by a new dynamic implementation. Vague names have been turned into meaningful names that fit into an organized system. UTILITY is now input.voltage. OUTVOLT is now output.voltage. This also applies to the names of instant commands. BTEST1 is test.battery.start, and BTEST0 is test.battery.stop. The old names are still supported for compatibility with older clients. This compatibility mode will be maintained throughout the 1.4 series, and will be gone by the release of 2.0. Users with older clients are encouraged to upgrade their software during this time.
  • The network protocol has been expanded to handle these new names. Older functions which only apply to the old names will continue to be supported through the 1.4 series.
  • The drivers and server (upsd) can now change their user ids and chroot themselves with the new -u and -r arguments. This lets you create a "chroot jail" with the bare minimum components. This technique is used to provide a higher degree of security. If someone exploited upsd to get a shell somehow, they would be stuck in the jail.
  • upssched now explicitly confirms reception of timer commands before exiting. This was done to avoid a race where one process would exit right when another one was starting. The second one would believe its command had been handled when it had been lost.
  • upslog has been reworked to use standard getopt parsing to provide the monitoring settings. The old way of specifying arguments is still supported for backwards compatibility. upslog has also been changed to only parse the format string once, rather than doing it every time through the loop. This should provide a minuscule drop in CPU utilization.
  • Usernames are now required in upsmon and upsd. This means that you must add a username to your MONITOR lines in upsmon.conf and then create a matching user in upsd.users. Installations from the 1.2 era probably already used usernames, so this mostly affects those from 1.0 and before.
  • Drivers are now pinged regularly by upsd when they aren’t posting updates about the UPS status. This provides another check in the data validation process. If upsd fails to get a response within a few seconds, the UPS will be marked stale.
  • A few minor memory leaks were discovered with valgrind and squashed.
  • upsstats now reuses connections to upsd when cycling through multiple entries in the hosts.conf. This makes things a bit faster and avoids some of the noise in the syslog. This only applies to entries that are adjacent. To take advantage of this feature, you may have to rearrange them per example below. Connection reuse for nonadjacent entries may be considered in the future.
        MONITOR ups-1@host-1 ...
        MONITOR ups-1@host-2 ...
        MONITOR ups-2@host-2 ...
        MONITOR ups-3@host-3 ...
  • upsd now warns about insecure configuration files at startup. These files (upsd.conf, upsd.users, and the certfile) should only be readable by upsd. Never make them world-readable.
  • The programs no longer print "shutting down" when they are just exiting. This was changed to avoid confusion about the term, since "shutting down" has a special meaning in UPS software.
  • Signal handlers no longer do any significant amount of work. Some of the programs used to do numerous things in there, raising concerns about reentrancy. They now set flags and allow the main loop to do the actual work from there.
  • A bug in upsmon where NOTIFYFLAG settings could be ignored was fixed.
  • Group handling has been changed. configure no longer accepts --with-group, and the programs no longer setgid() to a hardcoded value. They now setgid() to the primary group of whatever the user value may be. This may be compiled in with --with-user as before, and many programs accept -u to override it at runtime.
  • The state path is no longer created during make install. Users are now expected to create it themselves. This removes a lot of evil complexity from the build and install sequences.
  • upsd no longer implements the DROP access command, as it could confuse the clients by getting them out of sync. DROP is now implemented as DENY, which sends an error message. If you use DROP, you should change it to DENY rather than relying on this compatibility measure.
  • The belkin driver no longer reports OFF and OL at the same time.
  • The bestups driver no longer sleeps during polls, which makes it more responsive to things like instant commands.
  • The cyberpower driver now has much better hardware detection code and no longer freezes at startup under some conditions. It also now supports the shutdown function. Instant commands for shutdowns and battery tests were also added.
  • The dummyups testing driver has been removed. The dummycons testing driver can do everything that dummyups once did and much more. dummycons is also now built by default for easier testing.
  • The newapc driver has been reworked to take advantage of the new internal driver state functions. Some variables without an obvious purpose were dropped.
  • The newapc driver now sends all five bytes when using sdtype 1. Previously it didn’t send the entire string, and it didn’t work. [Don Lewis]
  • The hidups driver has been expanded to allow for setting variables, a shutdown sequence, and more. [Arnaud Quette]
  • The mge-utalk driver had trouble establishing communications in some cases due to the RTS line being set. This has been fixed. The mge-shut driver has been added to the tree, and has replaced the older mge-ellipse driver. [Arnaud Quette, Philippe Marzouk]
  • Outlet-level control has been defined in the variable tree, and will be added to drivers where the hardware supports it. This can be used to shut down some components earlier than others to prolong your runtime on battery. This is supported in the mge-shut driver now, and may show up in others before long. [Arnaud Quette]
  • KIN-2200AP hardware is now recognized by the powercom driver. This change may also support other KIN-xxxxAP equipment. [Preston A. Elder]
  • The 1.1kVA UPS is now supported by the bestuferrups driver. This driver was also changed to allow easy addition of more models in the future. [Bob Apodaca]
  • The fentonups driver can now handle devices which implement the "I" detection differently, and now supports the Giant/WELI 500 as a result. [Joon Guillen]
  • The serial number of the UPS being monitored can now be specified with serial= in ups.conf in the genericups driver. [Shaul Karl]
  • The newapc driver now sends ESC to break out of menus when the initial detection fails. Some new APC models have interactive menus on the serial port, and the driver couldn’t handle them before.
  • The snmp-ups driver now reports ambient temperature and humidity data for APC equipment. It also now supports the shutdown.reboot and shutdown.reboot.graceful commands. [Dmitry Frolov]
  • The list of supported variables and commands in the snmp-ups driver has been expanded. [Arnaud Quette, J.W. Hoogervorst]
  • Various drivers now report bypass mode with the BYP status word. [Arnaud Quette]
  • Energy Sistem equipment is now supported with the esupssmart driver. [Antonio Trujillo Coronado]
  • The Tripp-Lite SU series (SmartOnline) is supported with the new tripplitesu driver. [Allan Hessenflow]
  • The HP PowerTrust A2994A is now recognized by the hp driver. [Jan Sporbeck]
  • Many drivers were cleaned up to perform basic sanity checks on the status data before using it.
  • An explicit cleanup function has been added to the driver core to ensure that all dynamic resources are freed before exiting. This is part of the larger process to check for memory leaks and other bad things. [Arnaud Quette]
  • upsd now provides variable descriptions from an auxiliary file. This file is optional, which allows for a smaller memory footprint. It can also be edited for localization or other customizations.
  • upsimage and upsstats can now render BATTVOLT data. [Andrew R. Ghali]
  • String handling has been cleaned up throughout the tree. Calls to functions like strcpy and strcat were either replaced with other (range-checking) functions or were rewritten to avoid it.
  • Many compile-time defaults may now be overridden at runtime. In the environment NUT_CONFPATH and NUT_STATEPATH may be used. upsdrvctl has been changed to execve to pass these along to the drivers. ups.conf now supports driverpath=, and upsd.conf supports DATAPATH. [Bryan Henderson]
  • The configure --with-gd switches now actually do something useful when gd has been installed outside the default search directories. [Patrik Schindler]
  • The inline keyword is now handled properly on systems which do not support it or have it specified as another name. This was breaking compiles on some systems. [Petter Reinholdtsen]

2.30. Release notes for NUT 1.2.2 - what’s new since 1.2.1

  • The snmp-ups driver has been upgraded and expanded. It now supports multiple MIBs, meaning it can handle RFC 1628, APCC, and MGE equipment. You can pick the right one with "mibs=" in ups.conf. Support for setting variable and instant commands is also available. [Arnaud Quette and Dmitry Frolov]
  • The powernet driver has been upgraded. It now supports more variables, has cleaner logging, and may now be considered stable. [Dmitry Frolov]
  • The hidups driver now supports physical port IDs. This avoids most of the problems where the hiddev* names can jump around too easily. It will now stay in the same place as long as you keep it plugged into the same physical port. See the ChangeLog file for more details. [David Brownell]
  • The hidups driver now also supports the MFR variable on APC Back-UPS ES equipment. [Jonathan A. Davis]
  • The sms driver has been updated to version 0.70. [Marcio Gomes]
  • The bestups driver now recognizes Best Power Axxium Rackmount equipment. [Ales Casar]
  • The liebert driver now uses O_NONBLOCK, and should now work consistently on OpenBSD as a result. [Alex Cichowski]
  • The liebert driver also now uses debouncing logic on the status lines. It was possible to get false readings that would start a shutdown or just annoy users with excessive onbatt/online notify messages. The new code forces the status to settle down for 3 polls before accepting the new value. This means that very short power events may not be detected. The alternative is having your machine shut down just because it decided to wiggle over to OB LB for a few seconds.
  • upsmon has had the disconnect logic fixed so the "communications lost" (COMMBAD) notify will actually go out when the connection fails. [Steve Monett]
  • upssched now uses a lock file to prevent a race where two could start at the same time. The second upssched would "win", and the first one would be unreachable. This had the side-effect of not being able to cancel timers on the first one. If you use upssched, you must define the LOCKFN directive when upgrading to this version, or it will not work. [Gaspar Bakos]
  • The packaging and scripts for Red Hat systems have been updated. [Antonino Albanese]
  • upsd is now a bit more lenient about access levels in the numlogins check, which is what caused the problem in upsmon (next item).
  • upsmon no longer gets stuck in slavesync() when upsd is configured to drop certain queries. This usually happened at the worst possible time: in the middle of a shutdown. [John David Garza]
  • The upsclient functions now do more sanity checking on data from upsd so a short read won’t return garbage to the callers.
  • upsset now works properly with ENUM/VARTYPE values for multiple UPSes on a single upsd. [Dmitry Frolov]
  • Various portability fixes for building on SGI were applied. [Andrea Suatoni]
  • upsd no longer tries to reference a deleted client structure if the client disconnects at the wrong time. Previously, it tried to use that pointer after the sendback() function had already failed on write and deleted the client. This could cause upsd to segfault depending on what areas were accessed. [Patrik Schindler]

2.31. Release notes for NUT 1.2.1 - what’s new since 1.2.0

  • The sms driver is back, with support for Microlink Manager III hardware. [Marcio Gomes]
  • Fideltronik Ares Series hardware is now supported as genericups type 19. [Tomek Orzechowski and Arkadiusz Mikiewicz]
  • The drivers no longer silently drop instant commands or set commands from upsd that happen to get fragmented in transit. [linux@horizon.com]
  • The old multilink driver is back with a new name: liebert. It supports Liebert UPStation GXE hardware with the contact-closure cable. This is currently an experimental driver as there is no way to power down the load.
  • configure now picks up the right flags for gd automatically if gd 2.0.8 or higher is installed. This greatly simplifies the CGI build process for most users.
  • Shutdowns on FreeBSD using the genericups driver should work again. [Petri Riihikallio]

2.32. Historic releases

More ancient history is not covered in detail here.

You can see docs/history.txt for more details.