SONOFF 4CH/4CHPRO DIY Smart Switch User Manual V1.0
Product Introduction
The SONOFF 4CH/4CHPRO series includes the 4CHR3 (4-gang Wi-Fi Smart Switch) and the 4CHPROR3 (4-gang Wi-Fi Smart Switch with RF Control).
4CHR3
A diagram shows the 4CHR3 device. It features four channel terminals (L1/L2/L3/L4) and neutral terminals (N) on the top. A manual switch/pairing button is located on the left side, labeled (L1/L2/L3/L4). On the right side, there are two LED indicators: a red On/Off LED indicator and a blue Wi-Fi LED indicator. The bottom edge has input (In) and output (Out) terminals for each channel (L1, L2, L3, L4).
4CHPROR3
A diagram shows the 4CHPROR3 device. It features four channel terminals (R1/R2/R3/R4) on the top. A manual switch/pairing button is located on the left side, labeled (R1/R2/R3/R4). On the right side, there are two LED indicators: a red On/Off LED indicator and a blue Wi-Fi LED indicator. The bottom edge has terminals for DC Input and AC Input, followed by screw terminals for normally open (NO), common (COM), and normally closed (NC) for each channel.
Specifications
| Model | 4CHR3/4CHPROR3 | |
|---|---|---|
| Input | 4CHR3: 100-240V AC 50/60Hz 4CHPROR3: 100-240V AC 50/60Hz (DC: 9-23V) | |
| Output | 4CHR3: 100-240V AC 50/60Hz 4CHPROR3: 100-240V AC 50/60Hz (DC: 9-23V) | |
| Max. Load | 4CHR3: 10A/2200W/Gang 16A/3500W/Total 4CHPROR3: 10A/2200W/Gang 40A/8800W/Total | |
| RF | 433.92MHz | |
| Wi-Fi | IEEE 802.11 b/g/n 2.4GHz | |
| Operating systems | (Android 4.1 & iOS 9.0) or higher | |
| Material | PC | |
| Dimension | 145x90x34mm | |
⚠️ 4CHR3 does not support the remote controller with 433.92MHz.
Features
The 4CHR3/4CHPROR3 is a 4-gang Wi-Fi smart switch with self-locking, interlock, and inching modes. It allows remote control of connected devices via smartphone, scheduling, and sharing control with family members.
- ? Remote Control
- ⏱️ Single/Countdown Timing
- ? Voice Control
- ? Share Control
- ? 433MHz Remote Control (4CHPROR3 only)
- ? Smart Scene
- ? Power-on State
- ? Camera Feature
- ? Self-locking Mode
- ? Interlock Mode
- ⚡ Inching Mode
- ? LAN Control
RF Remote Controller Pairing (4CHPROR3)
The 4CHPROR3 supports remote control using a 433.92MHz frequency band for turning devices on/off. Each channel can be programmed independently for local short-range wireless control, not Wi-Fi control.
Pairing Method:
Long press the channel switch button to be paired for 3 seconds until the Wi-Fi LED indicator ? turns red and flashes quickly once. Release the button, then briefly press the desired button on the remote control. If the Wi-Fi LED indicator ? turns red and flashes quickly once, pairing is successful.
Clearing Method:
Long press the channel switch button to be cleared for 5 seconds until the Wi-Fi LED indicator ? turns red and flashes twice. Release the button, then briefly press the button on the remote control to clear the code. If the Wi-Fi LED indicator ? turns red and flashes quickly once, the code is cleared.
Pairing Modes
Compatible Pairing Mode
If Quick Pairing Mode fails, use Compatible Pairing Mode.
- Long press any configuration button ? for 5 seconds until the Wi-Fi LED indicator ? changes in a cycle of two short flashes and one long flash, then release. Long press any configuration button ? for 5 seconds again until the Wi-Fi LED indicator ? flashes quickly. The device enters Compatible Pairing Mode.
- In the app, tap "+" and select "Compatible Pairing Mode".
For Android system:
Enter Wi-Fi password and tap "Next". Wait for pairing to complete.
For iOS system:
Select Wi-Fi SSID "ITEAD-******" and enter password "12345678". Return to the eWeLink app and tap "Next". Wait for pairing to complete.
Factory Reset
Long press any configuration button ? for approximately 5 seconds until the Wi-Fi LED indicator ? flashes in a cycle of two short and one long flash. Release the button; the reset is successful, and the device enters Quick Pairing Mode.
⚠️ Please reset the switch to factory defaults if you want to change the Wi-Fi network, then reconnect to the new network.
A diagram shows the device with a hand pointing to the pairing button, indicating the reset procedure.
Common Problems
Q: Why my device stays "Offline"?
A: A newly added device requires 1-2 minutes to connect to Wi-Fi and the network. If it remains offline for an extended period, check the Wi-Fi LED indicator ? status:
1. Blue Wi-Fi indicator ? flashes quickly once per second:
This means the switch failed to connect to your Wi-Fi.
- ① Incorrect Wi-Fi password entered.
- ② Too much distance between the switch and router, or environmental interference. Move the switch closer to the router. If it fails, try adding it again.
- ③ 5G Wi-Fi network is not supported; only 2.4GHz is supported.
- ④ MAC address filtering might be enabled. Disable it.
If the above steps do not resolve the issue, try creating a Wi-Fi hotspot using your mobile phone's data and add the device again.
2. Blue Wi-Fi indicator ? flashes quickly twice per second:
This means the device is connected to Wi-Fi but failed to connect to the server.
Ensure your network is stable. Frequent double flashes indicate an unstable network, not a product issue. If the network is normal, try power cycling the switch.
Company Information
Shenzhen Sonoff Technologies Co., Ltd.
1001, BLDG8, Lianhua Industrial Park, Shenzhen, GD, China
ZIP code: 518000
Website: sonoff.tech
MADE IN CHINA
