SONOFF 4CH Pro R2 MQTT Switch with Tasmota Firmware
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They 4CH Pro R2 contains a RF 433MHz receiver module making it possible to control RF devices with a RF Remote as well as over MQTT.
The 4CH Pro switch can be DIN Rail mounted.
- Frequency: 433MHz
- Modulation: ASK
- Code: Fixed
- Voltage: 90-250V
- Maximum current: 10A
- Maximum watt: 2200
- Wifi standard: 802.11b/g/n
- Wifi security: WPA-PSK/WPA2-PSK
- Software: Tasmota
- Operating temperature: 0-40C
- Operating Humidity: 5-90%RH, non condensing
- Enclosure Material: Fire-retardant ABS V0
- Color: white
- Size: 145*95*45mm
It provides local control, MQTT and integration with home automation systems such as openHAB, Home Assistant and Domoticz.
You may find more information on the official GitHub page
You may also find relevant information on Tasmota at
If you are starting out and wish to have a relatively easy experience in developing your projects, then try the build-in web interface.
Example of Tasmota Web Interface
the Sonoff 4 Channel Pro MQTT Switch
For the temperature/humidity monitor, you also need to specify the sensor type, e.g. AM2301.
You use the Tasmota WEB UI for configuration. Enable MQTT in "Configuration/Other" and then specify your setup in "Configuration/MQTT".
For more details see also https://github.com/arendst/Sonoff-Tasmota/wiki/MQTT
There is a description of the integration with Home Assistant on the Tasmota site.
DrZzz has made some tutorials, which may be helpful (but skip the parts about flashing Tasmota).
General setup for tasmota is described at https://www.youtube.com/watch?v=c2IUIUnxjUY&t=859s
For the RF Bridge there are some more specific instructions at https://www.youtube.com/watch?v=Ega4U1KRlso