Background: I have a server board Intel S1200V3RP (S1200V3RPL) and I'm powering it from a 12V pico power supply. The power consumption varies between 15W and 50W. I want to make battery backup power - I'll put buck-boost to provide the stable 12V for the board and then I'll power it from 15 to 19V AC adapter. I'll have switch to provide power from a battery - I'll probably use two diodes as a start.
To the point: The board has I2C/SMBus connector for the power supply. Does someone know if the protocol is described somewhere? I don't know much about SMBus - Is it any different than standard I2C? Can I get SMBus commands from IPMI specification documents?
Most of this is just for fun. The system is working without the I2C connected, but there is a blinking LED for power redundancy lost and the BMC is reporting "reports redundancy has been lost", which is kinda annoying.
I also want to connect my solar panel to the power sully to reduce power consumption during the day. If I can report the power via I2C it would be nice for logging.