[Nut-upsuser] Powercom BNT-800AP

[cooleyr at gmail.com]

While fundamentally working, I'm having a few issues with the driver...

The default voltage quads (for every model) are way off...  Showing
~95v when it should be ~117V.  I've changed the 4th/final coefficient
to +5.0, but haven't tested extensively (with fluctuating voltages).

The input/output voltage appears to be swapped _most of the time_.
When doing a battery test, or when unplugged, the input stays steady,
and the _output_ voltage reports a drop to ~15V.  OTOH, when the UPS
is shutdown, the ordering appears correct, as the input stays steady,
and the output shows ~5V.

For the above, the Powercom upsmon software appears to special-case
those ~5/15V results, and on the next update, report it as 0V.  I have
no idea how to even special-case the screwy input/output-swapping
behavior...


./powercom -a ups0 -DDD
Network UPS Tools - PowerCom protocol UPS driver 0.12 (2.4.1-2308)
   0.000000     debug level is '3'
   0.001406     Flow control disable
   0.150003     Detected: BNT-other-500AP , 120V
   0.153986     Values of arguments:
   0.154001      manufacturer            : 'PowerCom'
   0.154009      model name              : 'BNT-other-500AP'
   0.154015      serial number           : 'Unknown'
   0.154022      line voltage            : '120'
   0.154029      type                    : 'BNT-other'
   0.154036      number of bytes from UPS: '16'
   0.154042      method of flow control  : 'no_flow_control'
   0.154051      validation sequence: '{{8,0},{8,0},{8,0}}'
   0.154059      shutdown arguments: '{{1,30},y}'
   0.154073      frequency calculation coefficients: '{0.000208,0.000000}'
   0.154084      load percentage calculation coefficients:
'{1.447400,0.000000,0.859400,0.000000}'
   0.154101      battery percentage calculation coefficients:
'{5.000000,0.326800,-825.000000,0.465110,0.000000}'
   0.154110      voltage calculation coefficients: '{0.954500,5.000000}'
   0.305927     input.frequency   (raw data): [raw: 80]
   0.305966     input.frequency: 60.09
   0.305974     output.frequency   (raw data): [raw: 80]
   0.305987     output.frequency: 60.09
   0.305994     ups.load  (raw data): [raw: 0]
   0.306008     ups.load: 0.0
   0.306015     battery.charge (raw data): [raw: 197]
   0.306027     battery.charge: 100.0
   0.306035     input.voltage (raw data): [raw: 119]
   0.306048     input.voltage: 118.6
   0.306055     output.voltage (raw data): [raw: 26]
   0.306067     output.voltage: 29.8
   0.306079     STATUS: OB TEST
   0.306338     dstate_init: sock /var/state/ups/powercom-ups0 open on fd 5
   0.453868     input.frequency   (raw data): [raw: 80]
   0.453907     input.frequency: 60.09
   0.453914     output.frequency   (raw data): [raw: 80]
   0.453925     output.frequency: 60.09
   0.453931     ups.load  (raw data): [raw: 0]
   0.453944     ups.load: 0.0
   0.453950     battery.charge (raw data): [raw: 195]
   0.453961     battery.charge: 100.0
   0.453968     input.voltage (raw data): [raw: 119]
   0.453979     input.voltage: 118.6
   0.453986     output.voltage (raw data): [raw: 26]
   0.453997     output.voltage: 29.8
   0.454008     STATUS: OB TEST
   1.853474     new connection on fd 6
   2.457023     input.frequency   (raw data): [raw: 80]
   2.457070     input.frequency: 60.09
   2.457077     output.frequency   (raw data): [raw: 80]
   2.457088     output.frequency: 60.09
   2.457095     ups.load  (raw data): [raw: 0]
   2.457108     ups.load: 0.0
   2.457115     battery.charge (raw data): [raw: 191]
   2.457140     battery.charge: 95.0
   2.457147     input.voltage (raw data): [raw: 119]
   2.457159     input.voltage: 118.6
   2.457167     output.voltage (raw data): [raw: 25]
   2.457185     output.voltage: 28.9
   2.457197     STATUS: OB TEST
   4.456188     input.frequency   (raw data): [raw: 80]
   4.456240     input.frequency: 60.09
   4.456248     output.frequency   (raw data): [raw: 80]
   4.456259     output.frequency: 60.09
   4.456266     ups.load  (raw data): [raw: 0]
   4.456279     ups.load: 0.0
   4.456286     battery.charge (raw data): [raw: 193]
   4.456656     battery.charge: 100.0
   4.456673     input.voltage (raw data): [raw: 119]
   4.456686     input.voltage: 118.6
   4.456693     output.voltage (raw data): [raw: 119]
   4.456849     output.voltage: 118.6
   4.456978     STATUS: OL
   6.455365     input.frequency   (raw data): [raw: 80]
   6.455420     input.frequency: 60.09
   6.455428     output.frequency   (raw data): [raw: 80]
   6.455439     output.frequency: 60.09
   6.455445     ups.load  (raw data): [raw: 0]
   6.455458     ups.load: 0.0
   6.455465     battery.charge (raw data): [raw: 193]
   6.455476     battery.charge: 100.0
   6.455483     input.voltage (raw data): [raw: 119]
   6.455494     input.voltage: 118.6
   6.455500     output.voltage (raw data): [raw: 119]
   6.455511     output.voltage: 118.6
   6.455522     STATUS: OL

For anyone wondering, I wouldn't recommend these units to anyone else.
 A 400W dumb/"personal" UPS from APC/CyberPower/Tripp-Lite is likely
just as capable, and certainly built better...