Sonoff Dual R3 in wall Smart Switch | ESP32 Power Monitoring & BLE | How to Setup Tasmota

Sonoff iTead Dual R3 with Tasmota - Dual channel power monitoring and BLE scanning. Full guide of setup and even some soldering & flashing how-to tips as a bonus! Power monitoring chip CSE7761

Where to Purchase
iTead Sonoff Dual R3
(Other stores will be listed when they become available)
BLE Sensors (optional)

Soldering & Others
USB On/Off Cable -
USB TTL 3.3v -
Hakko Soldering Station -
T100 Portable Soldering Iron -
Flux -
Bluetack -
Fine 0.015 Solder -
Jumpers -
CliffQuickTest -

Tasmota Template
{"NAME":"Sonoff Dual R3","GPIO":[32,0,0,0,0,0,3232,3200,0,576,225,0,0,0,0,0,0,0,0,0,0,7296,7328,224,0,0,0,0,160,161,0,0,0,0,0,0],"FLAG":0,"BASE":1}

Tasmota ESP32 -
Tasmota Bluetooth -
Setup BLE Sensors -
Live Stream of BLE Sensors -
BLE Sensor Github -

Products We Use/Recommend
Amazon US -
Amazon UK -
Amazon CA -

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  1. Hi, where can I get this version ( of tasmota for esp32 mentioned in the video? The latest development binary not working properly on my sonoff dual r3.

    1. You can always grab them off Github in the releases section, scroll back as far as you need.

    2. i tried tasmota release version 9.3.1, 9.4.0, 9.5.0 (with.bluetooth tasmota32-bluetooth.bin). On 9.3.1 i don't see power monitoring (no voltage, power etc.), relays works ok. On version 9.4.0 and 9.5.0 i see power monitoring , but relays behave strange (always after around 1 second they all going off - tested without mqtt, so it's not a retain message problem).

    3. Haven't seen that issue here. I even put the on it and haven't seen it reboot or relays turn off. You could try weblog 4 to see what the source is.

    4. I followed your advice and tested version but relays are still going off. After weblog 4 in console i saw
      C61: Rx
      C61: Tx
      in loop.
      Maybe something interferencing. On tasmota 9.3.1 i don't see C61 lines and relays are working well, but no power monitoring.
      I will stay on that version, probably only I have this problem with my dual r3. Thank you for help :)

  2. Hello, I am French (translation by google), I wanted to know if it is possible to have: energy today, energy yesterday and energy total for each relay (separately).
    thank you

  3. Is there something specific you need to do to get the sensor data emitted on MQTT? I've got the sensors working but the data isn't sent via MQTT.

    1. No it just sends them automatically if MQTT is configured. You might need to look into the powerdelta command if you want the power more often.


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