I've been playing with UART since I'd like to connect my eBus boiler to a network. So my problem is that I'm able to correctly send data from the ESP but I cannot receive anything. Unfortunately there is no way to check error messages.
It works ESP->pc but pc->ESP doesn't work. Wiring etc is ok because I can regularily use the serial console. CAN ANYBODY test it please

Firmware image R147_RC8
Thank you David