RS485 module with ESP32
https://de.aliexpress.com/item/1005009583388691.html - TTL Turn RS485 485 to Serial UART Level Mutual Conversion Hardware Automatic Flow Control Board Module XY-017
https://github.com/lorbetzki/Daikin-EKHHE
https://www.bizkit.ru/en/2019/02/21/12563/
https://how2electronics.com/how-to-use-modbus-rtu-with-esp32-to-read-sensor-data/
ESPhome configuration for DAIKIN Altherma M
https://github.com/jcappaert/esphome-daikin-ekhhe