Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Tuya WIFI Garage RF Smart Receiver. This device is designed to integrate your garage door or gate opener with smart home systems, allowing for remote control via smartphone applications and voice commands.
The receiver is available in two main versions: a WIFI+RF version and an RF-only version. Both versions support various operating voltages (AC/DC 9-30V or AC 85-250V) and a wide range of RF frequencies (300-900MHz) for compatibility with numerous remote control brands.

Figure 1: RF Only (left) and WIFI+RF (right) versions of the receiver.
Safety Information
- Ensure the power supply is disconnected before any installation or wiring.
- Installation should be performed by qualified personnel if you are unsure about electrical wiring.
- Do not expose the device to moisture or extreme temperatures.
- Keep the device out of reach of children.
Specifications
| Feature | Detail |
|---|---|
| Model Number | SMG-8122 |
| Brand Name | Scimagic-RC |
| Certification | CE |
| Operating Voltage | DC/AC 9V~30V or AC 85-250V |
| Channel | 2 |
| Frequency | 300MHz - 900MHz (Rolling code & Fixed code, Learning code) |
| Wireless Standard | WIFI 2.4GHz b/g/n (5G not supported) |
| Control Distance | 30-50 meters (RF), Unlimited (APP) |
| APP Support | Tuya / Smart Life |
| Voice Control | Google Assistant, Alexa |
| Encoding Method | Learning code |
| Mode | Momentary |
| Dimensions | 5.5cm x 4.5cm x 1.0cm (Very mini size) |
| Remote Codes Supported | Fixed code (2262, 2260, 2264, 5326, M1E, M5E, etc.), Learning code (1527, 2240, 6P20B, 6P20D, etc.), Rolling code (HCS301, HCS300, HCS200, HCS201, HCS100, HCS101, etc.) |
| Dip Switch | 8 dip switches for selecting different remote brands |
Setup and Installation
Pre-installation Checklist (WIFI+RF Version)
- Your smartphone or tablet must be connected to a 2.4GHz WiFi network with internet access.
- Bluetooth must be enabled on your phone.
- You must have the correct WiFi password.
- Your smartphone or tablet must have access to the APP Store (iOS) or Google Play Store (Android).
- Your router should be MAC-open.
Wiring Instructions
The receiver is designed to control gate automation systems, burglar alarm systems, electric doors, windows, lifting equipment, gateways, and lifting devices. It features two independent channels (OUT1, OUT2).

Figure 2: Wiring diagram for AC 85-250V WIFI+RF receiver.

Figure 3: Detailed wiring for AC/DC 9-30V input.
Power Input Selector (RF Version Only)
For the RF-only receiver (SMG-662), you need to adjust the Power Input Selector (PIS) jumper based on your power input:
- If the input voltage is greater than 24V, shorten pins 2 & 3.
- If the input voltage is less than 24V, shorten pins 1 & 2.

Figure 4: Power Input Selector (PIS) jumper settings.
App Installation and Pairing (WIFI+RF Version)
- Download the 'Tuya Smart' or 'Smart Life' app from your mobile app store or by scanning the QR code provided in the product manual (PDF).
- Register a new account or log in if you already have one.
- **Reset the device:** If the network indicator (red light) is already blinking fast (0.5S/time), skip this step. Otherwise, power on the device and hold down the Reset button for 10 seconds until the network indicator (red light) blinks fast (0.5S/time).
- In the Tuya Smart app, tap the '+' icon in the top right corner, then select 'Auto scan'.
- Wait a few seconds for the device to be found. Once found, tap 'Next'.
- Select your 2.4GHz Wi-Fi network and enter your password.
- Name your device as desired and press 'Save'.
- You can now control your device using the mobile app.
Remote Control Programming (Both Versions)
The receiver supports programming with various remote controls (fixed code, rolling code, learning code) across frequencies from 300-900MHz.

Figure 5: Dip switch settings for remote brand selection (WIFI+RF version).

Figure 6: Dip switch settings for remote brand selection (RF version).
- **Select the correct brand:** Use the 8 dip switches on the receiver to select the correct brand and frequency for the remote control you wish to program. Refer to the diagrams (Figure 5 and Figure 6) for specific combinations.
- **Enter learning mode:** Press the learn button (S1 or S2 for the respective channel). The corresponding LED (L1 or L2) will turn on.
- **Program remote:** Press the button on your remote control that you wish to program. The LED (L1/L2) will flash 4 times, indicating successful programming.
- Repeat step 2 and 3 for any other buttons on the remote or for the second channel.
Remote Control Delete Code
To erase all programmed remote controls from a channel:
- Press and hold the corresponding learn button (S1 or S2).
- The LED will start to flash. Keep holding the button until the LED turns off.
- All data in the memory for that channel will be permanently erased and cannot be recovered.
Notice: Be careful when erasing all data in the memory card. The data will be erased permanently and cannot be recovered.
Operating Instructions
APP Remote Control (WIFI+RF Version)
Once paired with the Tuya Smart or Smart Life app, you can control your garage door or gate from anywhere.
- **Open/Close:** Tap the corresponding button in the app to open or close the door.
- **Remote Monitoring:** Check the real-time open/closed status of your garage door directly from the app.
- **Schedules:** Set up schedules to automatically open or close your garage door at specific times. This can be used for daily routines or for specific events.

Figure 7: Setting schedules in the app.
- **Countdown Function:** Utilize the countdown feature for temporary access, such as allowing a courier to place a package in your garage. The door will automatically close after the set time.

Figure 8: Countdown function for temporary access.
- **Family Sharing:** Authorize other family members to control the device by sharing access through the app.

Figure 9: Family sharing feature.
- **Message Push & History:** Receive app notifications when your garage door opens or closes, and review the operation history.

Figure 10: App notifications and operation history.
Voice Control (WIFI+RF Version)
The WIFI+RF version supports voice control via Amazon Alexa and Google Assistant. Ensure your device is bound to Alexa or Google Assistant through the Tuya Smart/Smart Life app.

Figure 11: Voice control with Alexa and Google Assistant.

Figure 12: Example of voice command usage.
RF Control (Both Versions)
The traditional RF remote control function is retained, allowing your existing remote controls to continue working after programming them to the receiver. The receiver acts as an intermediary, enabling smart control without replacing your original remote system.
Maintenance
- Keep the device clean and free from dust.
- Do not attempt to open or repair the device yourself. Refer to qualified service personnel.
- Ensure stable power supply to the receiver for optimal performance.
- Regularly check for app updates to ensure compatibility and access to new features.
Troubleshooting
Common Issues and Solutions
- Device not connecting to WiFi:
- Ensure your WiFi network is 2.4GHz. The device does not support 5GHz networks. Check your WiFi password and ensure Bluetooth is enabled on your phone during pairing. Try resetting the device by holding the reset button for 10 seconds until the red light blinks rapidly.
- Remote control not working after programming:
- Verify that the correct dip switch combination was selected for your remote control's brand and frequency. Re-attempt the programming procedure carefully. Ensure your remote is not a 'clone code' type, as the smart receiver may not be compatible with them.
- Garage door not responding to app/voice commands:
- Check if the receiver has power and is connected to WiFi (blue LED should be steady). Ensure the app is updated and the device is properly linked to Alexa or Google Assistant. Verify the wiring connections to your garage door opener.
- Compatibility with specific garage door openers (e.g., Moovo MCI1, Faac C720):
- The receiver is designed to be universal. For specific models, ensure the opener provides a dry contact input (momentary pulse) for activation. If unsure, consult the manufacturer of your garage door opener or a professional installer.
User Tips
- When connecting to your garage door opener, ensure you are connecting to the correct terminals that trigger a momentary pulse for opening/closing.
- For optimal RF performance, ensure the antenna is not obstructed and is positioned for best signal reception.
- If you have multiple remote controls, program each one individually to the receiver, ensuring the correct dip switch settings are applied for each brand/frequency.
- Consider using the scheduling feature for routine tasks, like closing the garage door at night, to enhance security and convenience.
Warranty and Support
This product comes with a 1-year warranty from the date of purchase. For technical support or warranty claims, please contact the seller or manufacturer.
Manufacturer: ShenZhen Scimagic Development Technology Co., Ltd
For a detailed user manual in PDF format, please refer to the official product documentation available at this link.





