Sonoff 4CH
Sonoff 4CH and Sonoff 4CH Pro are 4-channel Wi-Fi smart relay boards.
By default, they run Sonoff proprietary firmware.
The following models are available:
- 4CH/4CH R2
- button inputs and relay outputs directly connected to ESP GPIOs
- 90-250V AC power
- relays control the L (live) AC power output
- 4CH Pro/4CH Pro R2
- inputs and outputs connected through a secondary MCU
- supports interlocking, self-locking and inching operating modes
- also supports 5-24V DC power
- NO/NC relay outputs available
Provisioning configuration name: espqtoggle/sonoff/4ch.
- flash mode: DOUT
- flash frequency: 40MHz
| Number | Function | Remarks |
|---|---|---|
| 0 | push button 1 | active low |
| 4 | relay 3 | active high |
| 5 | relay 2 | active high |
| 9 | push button 2 | active low |
| 10 | push button 3 | active low |
| 12 | relay 1 | active high |
| 13 | status LED | active low |
| 14 | push button 4 | active low |
| 15 | relay 4 | active high |
| Id | Type | Description | Range/Unit | Remarks |
|---|---|---|---|---|
push_button1 |
boolean | on/off button 1, setup button | ||
push_button2 |
boolean | on/off button 2, setup button | ||
push_button3 |
boolean | on/off button 3, setup button | ||
push_button4 |
boolean | on/off button 4, setup button | ||
relay1 |
boolean | relay 1 | ||
relay2 |
boolean | relay 2 | ||
relay3 |
boolean | relay 3 | ||
relay4 |
boolean | relay 4 |
- a philips screwdriver
- a USB-to-serial adapter
- a laptop running Windows, Linux or macOS
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⚠️ Do not power the device from mains! Do not connect it to AC at all during this procedure! -
Read the flashing instructions and be prepared to follow the flashing procedure.
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Open the device by unscrewing the 4 screws:
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Take out the board and identify the RX, TX, GND and VCC connectors. For the "Pro" model, also identify the GPIO0 pad:
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Ensure the USB-to-serial adapter is not plugged into your laptop.
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Connect the following USB-to-serial adapter wires to their corresponding connectors on the board: RX, TX, GND and VCC.
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Ensure device will boot into bootloader mode by:
- 4CH model: pressing and holding L1 button
- 4CH Pro model: connecting and holding the USB-to-serial adapter second GND wire to the GPIO0 pad
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Plug the USB-to-serial adapter into your laptop, effectively powering the ESP chip on the board.
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You can now release the L1 button or disconnect the secondary GND from GPIO0.
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Follow the flashing procedure to flash the espQToggle firmware on the ESP chip.
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Disconnect all wires and reassemble the device.
You can now power your device by connecting it to mains. Follow the initial setup instructions to connect the device to Wi-Fi and add it to your qToggle system.