1. Introduction
The EWELINK Wifi Smart Relay Module is a versatile smart switch designed for home automation. It allows remote control of various household appliances, including lights, lamps, computers, garage doors, and other devices, via the Ewelink app. This module supports both Wi-Fi and 433MHz RF remote control, and is compatible with voice assistants like Amazon Alexa and Google Assistant. It offers two primary working modes: Inching and Self-locking, providing flexibility for different applications.
Image: Front view of the EWELINK Wifi Smart Relay Module, showing input/output terminals and branding.
2. Safety Information
- Ensure all power is disconnected before installation or wiring to prevent electric shock.
- Installation should be performed by a qualified electrician or in accordance with local electrical codes.
- Do not exceed the maximum load specifications (10A, 2200W) to avoid damage to the module or connected appliances.
- Operate within the specified working temperature (-20°C to +70°C) and humidity (40% ~ 80% RH) ranges.
- This device is designed for indoor use only.
3. Package Contents
Depending on the selected type, your package may include:
- 1x Wifi module (with or without shell)
- 1x Instruction Manual
- Optional: 1x Remote control (battery 23A 12V not included)
Image: Example of product packaging, showing the module and an optional remote control.
4. Specifications
| Attribute | Value |
|---|---|
| Brand Name | Scimagic-RC |
| Model Number | Wifi module |
| Communication Method | RF, Wi-fi |
| Input Voltage | AC 85-250V, AC/DC 7-32V |
| Max Load | 10A, 2200W |
| Wireless Protocol | WiFi 2.4GHz (does not support 5GHz) |
| RF Frequency | 433MHz |
| Operating Temperature | -20°C to +70°C |
| Operating Humidity | 40% ~ 80% RH |
| App Name | EweLink |
| Voice Control | Google Assistant, Alexa |
| Function Feature | App Remote Control, Timer |
| Type | 1 channel |
| Feature | Inching/Self-Locking |
| Compatibility | All Compatible (Android, iOS) |
| Certification | CE |
Image: Product dimensions (72mm x 46mm x 28mm).
5. Setup
5.1 Physical Installation & Wiring
The module features two input ports for power supply (USB 5V or screw terminal AC 85-250V / AC/DC 7-32V) and passive output (dry contact) terminals (NO, NC, COM).
Important Note on Passive Output (Dry Contact):
- The relay output is a dry contact, meaning it does not supply voltage.
- Regardless of the power supplied to the input, the output terminals (NO, NC, COM) will not have the same voltage.
- You must supply external power to the connected device through the output terminals for it to function. The input power only powers the PCB board itself.
Image: Internal view of the module's PCB, showing Relay, NO, COM, NC terminals, Input, Match button, Mode switch button, Network indicator, and RF pairing indicator.
Wiring Diagram for AC 90-250V / DC 0-30V
Image: Wiring diagram illustrating connections for AC 90-250V/10A and DC 0-30V/10A loads. Input AC/DC 7-32V is shown for module power, and the load is connected to the NO/COM terminals with its own power source.
Wiring for Garage Door Opener
This module can be used to control garage doors by providing a pulse signal to the garage door opener's wall button terminals.
Image: Diagram showing how to connect the smart switch to a garage door opener's wall button terminals (typically 1 and 2) to simulate a button press.
5.2 App Installation
- Download the Ewelink app from the App Store (iOS) or Google Play Store (Android).
- Register or log in to your Ewelink account.
Image: Ewelink app download icons for App Store and Google Play.
5.3 Device Pairing (Wi-Fi)
- Ensure your phone is connected to a 2.4GHz Wi-Fi network. The module does not support 5GHz Wi-Fi.
- Power on the Smart Relay Module.
- Open the Ewelink app and tap 'Add Device' or the '+' icon.
- Follow the on-screen instructions to put the device into pairing mode (usually by pressing and holding the 'Match button' on the PCB until the network indicator blinks).
- The app will search for and discover the device. Confirm the device and complete the pairing process.
Video: Demonstration of pairing the Smart Relay Module with the Ewelink app, showing device discovery and basic control.
5.4 Device Pairing (RF 433MHz Remote)
- Press the 'RF pairing button' on the module's PCB.
- Press a button on your 433MHz RF remote control.
- The RF pairing indicator on the module will confirm successful pairing.
6. Operating Instructions
6.1 Working Modes
The module supports two working modes: Inching and Self-locking. You can switch between these modes using the 'Mode switch button' on the PCB.
- Inching Mode: When a channel is switched on, it will automatically close after a set duration (default 0.7 seconds). This is ideal for momentary actions like opening a garage door or gate.
- Self-locking Mode: Each channel can be switched on or off independently and will remain in that state until changed. You can also turn all channels on/off simultaneously.
Changing Inching Time
To change the inching time (range: 2-3600 seconds), you must first switch the module to Self-locking mode using the mode button. Then, you can adjust the inching time within the Ewelink app. The adjusted inching time will only apply when the module is in Inching mode.
Image: Ewelink app interface showing the timing function, allowing users to set on/off times for appliances.
6.2 App Remote Control
Once paired, you can control your connected appliances from anywhere using the Ewelink app on your Android or iOS smartphone.
- On/Off Control: Tap the power icon in the app to toggle the connected device.
- Timing & Scheduling: Set one-time, countdown, or loop timers to automate device operation.
- Scene Linkage: Group multiple smart devices to control them simultaneously with a single command or schedule.
Image: Ewelink app interface demonstrating remote control for various devices like lighting, feeding systems, and garage doors.
Image: App remote control for garage door, compatible with most traditional garage door openers.
6.3 Voice Control
Integrate the module with Amazon Alexa or Google Assistant for hands-free control.
- Link your Ewelink account to your Alexa or Google Home app.
- Discover devices.
- Use voice commands such as: "Alexa, turn on the garage door" or "Hey Google, turn off the living room light."
Image: Example of hands-free voice control using Alexa and Google Assistant to operate a garage door.
6.4 RF Remote Control
If you have paired a 433MHz RF remote control, you can use it to control the module directly.
Image: RF control demonstration, showing a user operating a garage door with a 433MHz remote.
6.5 Family Sharing
Share control of the smart module with family members through the Ewelink app, allowing multiple users to manage connected devices.
Image: Illustration of the family sharing feature, enabling multiple family members to control the device via their smartphones.
7. User Tips
- Dry Contact Output: Remember that the relay provides a dry contact output. This means it acts like a switch, not a power source. You will need to provide power to the device you are controlling separately. For example, when controlling a garage door, you connect the module to the opener's control terminals, which typically expect a momentary contact closure.
- Wi-Fi Compatibility: Always ensure your router is configured for 2.4GHz Wi-Fi during the pairing process, as the module does not support 5GHz networks. If you have a dual-band router, temporarily disable the 5GHz band or ensure your phone is connected to the 2.4GHz band.
- Inching Mode for Garage Doors: The inching mode is particularly useful for garage doors or gate openers, as it provides a brief signal to trigger the open/close mechanism without holding the circuit closed.
8. Troubleshooting
- Device not pairing:
- Ensure your Wi-Fi network is 2.4GHz. The module does not support 5GHz.
- Check if the module is powered on and the network indicator is blinking as per pairing instructions.
- Move the module closer to your Wi-Fi router.
- Restart your router and try again. - Connected device not responding:
- Verify that the module is correctly wired and receiving power.
- Confirm that the connected appliance has its own power supply, as the module's output is a dry contact (passive).
- Check the working mode (Inching/Self-locking) to ensure it matches your intended operation. - RF remote not working:
- Ensure the remote control has a working 23A 12V battery (not included).
- Re-pair the RF remote with the module by pressing the 'RF pairing button' on the module and then a button on the remote. - Voice control not working:
- Confirm that your Ewelink account is correctly linked to your Alexa or Google Home app.
- Ensure the device is discovered and named appropriately in the voice assistant app.
9. Maintenance
- Keep the device clean and dry.
- Avoid exposing the module to extreme temperatures or humidity.
- Do not attempt to disassemble or repair the module yourself, as this may void the warranty and pose safety risks.
10. Warranty & Support
This product comes with a 1-year warranty from the date of purchase. For support or warranty claims, please contact the seller or manufacturer directly. Please retain your proof of purchase.
