Hello to all. Got 4 generic E-WELink Generic 16 A Mini Smart Switch. They seem to use the BK7238 chip. I assume this based on the components that correspond to another thread of mine https://www.elektroda.com/rtvforum/topic4164432.html. So I try to flash the OpenBK firmware but I can't get a UART connection. Can someone suggest the pins location that I have to solder? Those that I soldered give power to the board but not RX/TX connection. Also to reach the pins I desoldered the 16 A relay.