Tasmota

Go to your sonoff console and enter

SetOption19 1

This turns on auto discover.

Then in HA go to Configuration > Integrations > MQTT .

I had a similar experience with the Teckin plug. Autodiscovery wouldn’t work. I finally did this:

• in tasmota: configuration > others > disable MQTT
• switch will reboot
• re-enable MQTT from configuration > others
• go to console and type the discovery cmd: “SetOption19 1”
• it should show now in homeassistant under the MQTT integration

MQTT Discovery REMOVED~ Home Assistant MQTT Discovery is removed from all builds of Tasmota and development of this feature is halted! ¹⁾

https://tasmota.github.io/docs/Expanding-Tasmota

If you can avoid it, don't use GPIOs: 0, 1, 2, 6-11, 15 and 16. That leaves 4, 5, 12, 13, 14 as GPIOs without any constraints. 3 being RX is also good to avoid (PWM is not working on this GPIO).

• GPIO 12
• GPIO 13
• GPIO 15

Pull-UP 10k

https://tasmota.github.io/docs/devices/Sonoff-RF-Bridge-433/