Hello, I have configured 2 ESP8266 with tasmota to control 2 set of lights. Added them on Configuration -> Things. The problem is when both are online i can’t control them from the Control Panel. It gives the instruction to power ON but it does nothing. If i power off one ESP, the other one works…

Each and every MQTT client needs ist own ID. If you have two Clients with the same ID such Problem could happen. Using Tasmota you can set the MQTT client ID on the webinterface.