I have the same settings, and no devices are found. Setup: RPi3, latest beta Domoticz, done the setoption19 1 thingy, MQTT up and running. Sonoff setup: MQTT Host 192.168.0.124 MQTT Port 1883 MQTT Client & Fallback Topic DVES_AF76EE MQTT User MQTT Topic sonoff35 (every Sonoff has it's own Topic ...