Communication between two A16 over RS485 on ESPHOME with uart not working

[MarioR]

The problem was that I ignored the RS485 interface type. With the RS485, A=>A and B=>B are connected, as opposed to a ‘normal’ UART connection.

I will not use their firmware.
I asked here because this forum is advertised as a support forum. Apparently, however, it is just an advertising and sales forum.