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The Sonoff Dual R2 offers control of 2 relays on one board.
| GPIO | Function |
|---|---|
| 0 | Button 0 on header |
| 1 | Serial Rx |
| 3 | Serial Tx |
| 5 | Relay 2 |
| 9 | Button 1 on header |
| 10 | Button on Case |
| 12 | Relay 1 |
| 13 | Blue Led |
Hardware Preperation
This device uses the ESP8285 module which is different than the other SONOFF products.
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