[Nut-upsdev] GPIO as NUT driver interface?

[MODRIS BĒRZONIS]

Hi!

I have CyberPower CyberShield CSN27U12V UPS. This device don't have 
usual for UPS interface, just open collector pins. I connected these 
pins to GPIO interface on Orange Pi Zero and wrote NUT driver for this 
case. Any interest from NUT community to add this driver to regular 
build tree?

See driver code in attachment. Code is fully functional, needs cleanup 
to match coding guidelines and needs more tests for rules processing 
part. Driver reads GPIO line statuses and transforms them to NUT 
statuses using short rules description parameter in the form of status 
strings and logical operations on line values.

Modris

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