sofar solar integration
if you ever need to get solar production info from sofar solar 4ktlm-g2 or any other RS 485 connected solar inverter. We'll be using ESP8266 MCU and esphome integration.
you need some
- ESP8266 MCU board
- MAX485 or MAX3485 TTL to RS485 board
Connections:
ESP ----> TTL conversion unit
DI6 (RX) ---- RO
DI5 (READY) --- DE+RE (short them)
DI7 (TX) ---- DI
Vin --- VCC
GND --- GND
RS485 - to A and B
loosely based on https://github.com/cmcgerty/Sofar2mqtt , so you can use the connection images .
install esphome on your laptop/device
run "esphome run esp-config.yaml" to upload to device over usb, after that you can push it by OTA. You should get an IP in log.
then just add a device in home assistant, integration name esphome - and IP from previous step
connection image:
you can scan by free modbus master tool (2.0.3.0 by Graham A Ross) to find the required registry value (read holding register from start address 0 and size 27)
