As Ive got about a month running the heatpump now (ecoAir), Airsource
I dont have EasyNet.
What you can set from the modbus is:
DHW setpoint
Pool setpoint
Bus heating set point (3 of them)
Bus cooling set point (3 of them)
Bus heating/cooling demand(Off/Heat/Cool for the 3 points )
DHW heating demand
Pool heating demand
All the BUS heating demands are separate from the ones set on the controller. And run in parallel. It goes with whatever is highest/enabled.
Does the EasyNet connect to the bms2 port in the heatpump?
Ive only implemented DG1 so far, That is all I currently need, but if there is a demand, I’ll get the rest implemented.
Ive used a ESP32 and a MAX3485 board for the RS486 communication.
I have also tried out an ESP32-C3 (https://www.tindie.com/products/thehognl/esp32-c3-with-rs485-modbus-and-optional-touch-tft/) which it is running on now, I did struggle to flash it, Something about the bootloader not being correct, The way I worked around it was flashing the basic ESP home onto it and then using the OTA to put the proper ESPhome code on it.