apcupsd sc420i line voltage

[Vukovics Mihály]

Hello Community,

I am strugling with APC SmartUPS SC420I and apcupsd.
The UPS is connected via usb-to serial adapter and 940-0024E cable.

The UPS is recognized as "Back-UPS Pro 280" instead of SC420I and the
line voltage is displayed as 120V instead of the real 230V.

UPSTYPE apcsmart
DEVICE /dev/ttyUSB0

Has any of  you experienced like this and know how to fix at least the
line voltage value?

Br,
Mihaly

[Alexander V. Makartsev]

Maybe it would be better to try "nut-server" which could have a better apcsmart driver implementation?
I have APC SmartUPS SC1500I with similar setup, USB-to-COM adapter and self-made APC UPS Smart cable and it is working fine with nut-server, both monitoring and control.

Another thing to check could be an usb-to-serial adapter. I've seen some cheap low-quality adapters which were created with counterfeit ICs.

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With kindest regards, Alexander.

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[Vukovics Mihály]

Hi Alexander,

thanks for the tipp. NUT also reports wrong model name and line voltage.
The USB-Serial converter is probably OK, as I can access the UPS over
ttyUSB and issue commands and get proper answers.

BR,
Mihaly

--
Köszönettel:
Vukovics Mihály