I need help or some step by step to configure home assistant on RPi 3B+.
Lost any hope, because I tried to communicate with SAJ solar inverter equipped with only RS-485, but I am not lucky.
Tried with USB-RS485 converter and modbus configuration but inverter not responding as it should be.
This is log from modbus poll:
Tx:000494-01 03 00 00 00 3C 45 DB
Rx:000495-7F 7E FF FF 87 75 49 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
After this I tried with serial to ethernet converter (RS-485 to ethernet) USR TCP232-410s and configuration.yaml mentioned about SAJ (sensor: -platform: saj; host: my_IP),
converter setup is TCP Server, local port: 502; 9600; 8;N;1.
With mentioned settings homeassistance in configuration.yaml doesn’t boot correctly but in safe mode, so I am missing something.
Home assistance won’t communicate with my converter, so I can conclude that conversation can’t be done through converter because it doesn’t have web server.
I am also confused why modbus poll can’t retrieve correct registers (tried 03 & 04) from SAJ. I found on web SAJ Modbus Communication Protocol (version A, edition 2.0, year 2017), but it is intended for SunUno Plus & SunTrio Plus series, so I can’t find adequate information for inverter bought 2013.
So I’ll be glad that someone could help me to solve problem of Home Assistant configuration step by step.
My version is Home Assistant Core 0.111.4
currently running version 0.107.7
I saw that fredericvl understand very well SAJ, so I would like to hear his opinion about problem solution.
Regards,
Dejan