Sonoff 4CH Pro (R2) User Guide
Hi, welcome to use Sonoff 4CH Pro! The Sonoff 4CH Pro is a 4-channel DIN rail mounting 433MHz RF remote WiFi switch that can independently control 4 home appliances. It supports switching among 3 working modes: inching, interlock, and self-locking mode.
Power supply: 90-250V AC (50/60Hz) / 5-24V DC. Max current: 10A/gang.
1. Download "eWeLink" App ⬇️
Search for "eWeLink" in the APP Store for the iOS version or Google Play for the Android version.
2. Wiring Instruction ?
If you want to connect the Sonoff 4CH Pro with lights or appliances, please strictly follow the wiring diagrams provided.
You may choose to power up by 5-24V DC or by 90-250V AC. Each relay provides switched output without voltage.
The R1-R4 switches on the board function as local control switches. You can directly press them to turn on/off the corresponding gang. They also serve as pairing buttons.
AC Motor Wiring Diagram
Note: Only 1 motor can run each time.
DC Motor Wiring Diagram
Note: Only 1 motor can run each time.
3. Add Device ➕ (Pairing)
- Power up your device using 90-250V AC (50/60Hz) or 5-24V DC.
- Press and hold one of the 4 switch buttons for 7 seconds until the WiFi LED blinks rapidly 3 times and repeats.
- Click the "+" icon on the eWeLink app to search for the device. Select the corresponding pairing icon and click next. The app will auto-search the device.
- Enter your home SSID & password:
- If your WiFi does not have a password, leave it blank.
- eWeLink currently only supports the 2.4G WiFi communication protocol. 5G-WiFi routers are not supported.
- Next, the device will be registered by eWeLink and added to your account. This process takes 1-3 minutes.
- Name the device to complete the setup.
- The device may appear "Offline" in eWeLink initially. It needs about 1 minute to connect to your router and server. The device is "Online" when the WiFi LED is on.
3. Working Mode Settings ⚙️
You can set the switch among 3 working modes: inching, interlock, and self-locking mode.
Self-locking Mode ?
In self-locking mode, you can turn on/off the 4 connected devices independently. For example, if you turn on CH1, the connected device stays on. If you turn off CH2, the connected device stays off.
Inching Mode ⏳
In inching mode, you can turn on the connected devices for a duration of 1-16 seconds. For example, you can turn on CH1 for 1 second, and it will automatically turn off afterward.
Interlock Mode ?
In interlock mode, you can turn on only one device at a time. Turning on another device will automatically turn off the previously active one. For example, if CH2 is turned on, and you then turn on CH3, CH2 will automatically turn off.
Switch Configuration for Modes
As seen from the PCB images, there are switches S5, S6, K6, and K5 used for configuration.
CAUTION: Please cut off the power supply before switching S5, S6, K5, K6. Whether you use DC or AC input, make sure you have unplugged the power plug every time! It's very dangerous if you don't cut off the power supply, and the new settings cannot be activated.
Work Mode Switch S6
| Position | Mode | Apply to |
|---|---|---|
| 0 (Right) | Interlock | CH1 to CH4 |
| 1 (Left) | Self-locking/Inching | CH1 to CH4 |
S6 is the interlock / inching & self-locking switch. Toggle to the right (0) for interlock mode; toggle to the left (1) for inching & self-locking mode.
Please note that if S6 is toggled to the right (0), your 4CH Pro is in interlock mode, and settings for K5 are invalid.
Work Mode Switch K5 (Inching/Self-locking)
| Position | Status | Mode | Apply to |
|---|---|---|---|
| 1 | 0 | Inching | CH1 |
| 2 | 0 | Inching | CH2 |
| 3 | 0 | Inching | CH3 |
| 4 | 0 | Inching | CH4 |
| 1 | 1 | Self-locking | CH1 |
| 2 | 1 | Self-locking | CH2 |
| 3 | 1 | Self-locking | CH3 |
| 4 | 1 | Self-locking | CH4 |
K5 consists of inching/self-locking switches. From left to right, they correspond to channels 1 (CH1), 2 (CH2), 3 (CH3), and 4 (CH4). Toggle the switch down (0) for inching mode; toggle the switch up (1) for self-locking mode.
Delay Time Switch K6 (for Inching Mode)
K6 is used to set the delay time for inching mode. From left to right, switches 1, 2, 3, 4 correspond to CH1, CH2, CH3, CH4 respectively. For example, toggling all switches down (0000) sets the inching time to 16s; toggling all switches up (1111) sets the inching time to 1s.
| Value | Delay | Apply to |
|---|---|---|
| 0000 | 16s | CH1 to CH4 |
| 0001 | 15s | CH1 to CH4 |
| 0010 | 14s | CH1 to CH4 |
| 0011 | 13s | CH1 to CH4 |
| 0100 | 12s | CH1 to CH4 |
| 0101 | 11s | CH1 to CH4 |
| 0110 | 10s | CH1 to CH4 |
| 0111 | 9s | CH1 to CH4 |
| 1000 | 8s | CH1 to CH4 |
| 1001 | 7s | CH1 to CH4 |
| 1010 | 6s | CH1 to CH4 |
| 1011 | 5s | CH1 to CH4 |
| 1100 | 4s | CH1 to CH4 |
| 1101 | 3s | CH1 to CH4 |
| 1110 | 2s | CH1 to CH4 |
| 1111 | 1s | CH1 to CH4 |
Note: Cut off the main supply before changing work mode.
4. RF Remote Settings ?
Learn with 433MHz RF Remote: Each gang supports 1 RF key, meaning each gang can only remember the RF key learned last time. To learn a new key, quickly press twice one of the switches below (on the PCB), then press one of the ABCD buttons on your RF Remote. If learned successfully, the button will light up in red, and the corresponding status LED will blink green 4 times. You can then press the learned button to turn on or turn off the corresponding channel.
Clear 433MHz Coding: S5 is the 433MHz code clearing button. Please press and hold it until the 4 LEDs light up green and then turn off.
5. APP Features ?
- WiFi Control: Use WiFi to remotely control 4 devices separately. Turn devices on/off by tapping their icons on the device interface. Device status is displayed simultaneously.
- Share Control ?: The owner can share devices to other eWeLink accounts. While sharing, both accounts should remain online on eWeLink. If the target account is not online, the invitation message will not be received.
To share: Firstly, click "Share". Input the eWeLink account (phone number or email address) you want to share with. Tick the desired permissions (e.g., timer, edit, delete, change, enable). Click "Next". The other account will receive an invitation message. Click "Accept" to complete the sharing. The other account will then have access to control your device.
- Timing ⏰: Supports a maximum of 8 enabled single, repeat, or countdown timers to auto-turn on/off connected appliances.
- Scene ✨: Scenes allow triggering on/off of your devices automatically. Scene Settings are located in the upper right corner of the Device List. You can set up scenes or smart scenes to trigger the Sonoff 4CH Pro. Users should select "Click to execute" in the condition, add different existing devices, name the scene, and save it.
4. Problems and Solutions ❓
Read the detailed FAQ on the Itead Smart Home Forum. If the answers below cannot solve your problem, please submit feedback on eWeLink.
- My device has added successfully but stays "Offline".
Answers: The newly added device needs 1-2 minutes to connect to your router and the Internet. If it stays offline for a long time, please judge the problem by the WiFi LED status:
- 1.1. WiFi LED quickly blinks one time and repeats: Device failed to connect to the router. Reasons may include an incorrect WiFi password, the device being too far from the router causing a weak signal, or using a 5G-WiFi router (only 2.4G is supported). Ensure your router is MAC-open.
- 1.2. WiFi LED slowly blinks one time and repeats: Device has connected to the router and server but failed to be added to the device list. Power cycle the device and try adding it again.
- 1.3. WiFi LED quickly blinks twice and repeats: Device has connected to the router but failed to connect to the server. Please confirm your WiFi router is working normally.
- Why the APP cannot find the device in pairing status?
Answers: This is likely due to your phone's cache. Please close your phone's WLAN, wait a minute, then reopen it. Simultaneously, power off the device if possible, then power it up again to try.
- My WiFi has expired, can I connect the devices to LAN?
Answers: Currently, this product does not support LAN or direct hotspot connection. It must connect to a WiFi router with a normal network that can access the Internet.
- The WiFi LED keeps off, even if the device is powered on. Pressing the button does not work.
Answers: The circuit may be broken. Please send it back for testing. Return shipping postage and packaging will be at the buyer's expense. If the device is damaged by the buyer, the buyer should bear extra repair costs.
