Add Sofar MODBUS (official protocol published!)

[pazdzierzz]

What

That feaute will enable SOFAR users use modbus protocol to communicate Battery Emulator with inverter

Why

Perfect mix for single Lilygo use. No CAN conflicts. RS485 goes to Inverter, CAN goes to battery.

Sofar Modbus Protocol

source: https://downloads.sofarsolar.eu/?_product=hyd-5-20ktl-3ph&_download_type=firmware

SOFAR_Modbus_Protocol_English_G3_V1.22(only 3PH).xlsx

Most importatnt bits are here:

Cheers!