Powercom produces a variety of differentUPS series and models. So far, only some of Line-Interactive series are supported, and only those which has an RS-232 (serial, COM)connector.
USB models are not supported. The USB "support" in all theseries with USB connector consists of a USB-to-Serial converter, sobasically the same protocol ("language") can be used to talk with suchUPSes, but I know right to nothing about how USB works and hence Ican't implement such support. Someone implemented a kernel-leveldriver for (some) of such series for Linux, -- the driver createsa /dev/ttyUSBn device which works like a COM-port, and withthis driver it's possible to use USB models with upsd.Also, in NUT projectthere are several drivers which works with similar hardware (trivialUSB-to-Serial converter in the UPS), but works in userspace.Please email me if you're able and willing to write USB transportfor USB-to-Serial converter used in PCM models in userspace (over/dev/hiddevN device in Linux, which is not a true HID).
Only models with suffix "P" are supported - which stands for "PRO".Those models has control connector and cirquit, the rest arecontrol-less in principle.
The models supported all implements the same (modulo several differences)protocol. Host sends a command (one byte plus 1 or 2 bytes argument whenappropriate), and UPS either responds with status information (11 or 16bytes encoded status data) or performs certain actions (shutdown, self-testetc).
Basic status (encoded as bits in two bytes of status reply) is supportedfor all models with this protocol. It's such things as whenever we'rerunning on battery or online, whenever there's low-battery condition (whenrunning on battery) or not, whenever UPS is over-loaded or just "failed"for whatever reason, if there's a self-test in progress and the like --in other words, everything which can be said in a single on/off bit.
All models in these series also tells "advanced" information, such asinput and output voltage levels and frequencies, UPS load level andbattery charge level. But for those, it's near impossible to findthe right ways to calculate the values, which depends on the exactmodel (series, wattage and voltage) and various status bits (for example,output voltage is calculated differently depending on whenever the UPSis running off battery, or whenever it boosts or bucks input - it'sin addition to the exact model number and voltage). There's verylittle information available about ways how to decode all the values,and even their own specs contradicts with each other and with thereality - certain models gives unreal values when calculated usingany of the available formulas.
Due to all this, don't expect that your UPS will be supported by upsd in "advanced" mode (basic bits will work). Also dueto this, please send me email ifyou tried your UPS with upsd and whenever it worked andwhenever levels looks ok or not. For this, it's best to have completeinformation - if you have a voltmeter handy and especially if youcan change input voltage (to test AVR mode), please run upsd in debug mode (so it will show raw data as read from UPS), andwrite out a simple table which lists actual input/output voltage,raw values corresponding to those levels, when it starts its AVRthings (also input/output voltage and raw data). Try plugging/unpluggingsomething to/from UPS so that load level will change, and also recordall the values. Also try turning input power off and wait for sometime (again recording values) - the best is up to the point whereit will say "low battery" (don't wait longer!) - record this moment(decoded battery level should be 29 at this point) - you will alsoknow how much time your UPS will be able to power your hardwarebefore it will run out of battery.
See also drv_pcm.c file in source tarball for alotmore protocol details -- everything which is known so far.Sadly it's difficult to find/get useful information, and even thevery brief information Powercom gives (so-called "specifications") issemi-secret (ie, they give you the "specs", probably, but will askyou not to tell anyone else).(I collected this information piece by piece from various sources,mostly public).
Supported PCM series and devices
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