Citeren Rainer Fuegenstein <[email protected]>:

[r...@helios ups]# upsc ivtscd
battery.current: -1.9
battery.current.maximum: 2.2
battery.current.minimum: -2.4
battery.temperature: 16
battery.voltage: 12.10
battery.voltage.maximum: 14.02
battery.voltage.minimum: 11.84
device.mfr: IVT
device.model: Solar Controller Device
device.type: scd
driver.name: ivtscd
driver.parameter.pollinterval: 2
driver.parameter.port: /dev/ttyS0
driver.version: 2.4.1
driver.version.internal: 0.02
ups.status: OB

the value of the current is off by about -1A, which also pulls the voltage down by about 0,5V or so.

Try if commenting out lines

241     ser_set_dtr(upsfd, 1);
242     ser_set_rts(upsfd, 0);

in 'ivtscd.c' makes any difference. I added these because many serial interfaces on UPS devices require this, but this may have backfired on us. It's probably not needed anyway, since there seems to be no isolation in the SCD anyway (so we don't have to power the isolated parts through the serial interface).

Best regards, Arjen
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