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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 and Optional Sensor |
| 3 | Serial Tx and Optional Sensor |
| 5 | Relay 2 (RED LED) |
| 9 | Button 1 on header |
| 10 | Button on Case |
| 12 | Relay 1 (GREEN LED) |
| 13 | Blue Led (Inverted) |
Hardware Preperation
This device uses the ESP8285 module which is different than the other SONOFF products.
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- Startup the Arduino IDE
- Open sonoff.ino
- Update parameters in user_config.h.
Set the SWITCH_MODE to FOLLOW
Update the wifi settings: STA_SSID1, STA_PASS1, STA_SSID2, STA_PASS2
Code Block #define STA_SSID1 "mywifissid" // [Ssid1] Wifi SSID #define STA_PASS1 "mywifipwd" // [Password1] Wifi password #define STA_SSID2 "mywifissid2" // [Ssid2] Optional alternate AP Wifi SSID #define STA_PASS2 "mywifisspwd2" // [Password2] Optional alternate AP Wifi password #define SWITCH_MODE FOLLOW
- Set Board Info
Entering Programming Mode
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From the Arduino IDE, click Sketch → Upload
Reference
| Reference | URL |
|---|---|
| Product Info | http://sonoff.itead.cc/en/products/sonoff/sonoff-dual |
| Schematic for Dual | https://www.itead.cc/wiki/images/1/1d/Sonoff_Dual_View.pdf |
| Sonoff-Tasmota | https://github.com/arendst/Sonoff-Tasmota/wiki/Sonoff-Dual-and-Dual-R2 |
| Sonoff-Tasmota Switch Modes | https://github.com/arendst/Sonoff-Tasmota/wiki/Understanding-SwitchMode-and-SwitchTopic |