(05-30-2026, 08:55 PM)admin Wrote: you should add extend power supply is better. if you want use HAv2 for KC868-AP, you need config ESPHome by yourself.

Sorry to ask, but do you mean, its better to use a separate 12v power supply for the HAv2 boards? And indeed I am planning to write the code for the buttons  and add it to AP esphome code. This is because, the only board I will have with rs485 interface is the KC868-AP. I hope that the esp32 can handle all the code. If not, is there another way to get the button information into homeassistant ? When I have sorted it all out, i will buy all the needed equipment at your site.