1. Product Overview
The SCS SENTINEL Smart Garage Door/Gate Receiver offers advanced control for your garage doors, gates, and other automation systems. The SMG-8112-SCS model integrates WiFi connectivity, allowing control via the Tuya/Smart Life App, voice commands through Alexa and Google Home, and traditional 433.92MHz RF remote controls. The SMG-822 model provides reliable 433.92MHz RF control without WiFi functionality.
Figure 1: SMG-8112-SCS Receiver with Remote Controls
Key Features (SMG-8112-SCS)
- App Remote Control via Tuya/Smart Life App
- Voice Control (Alexa & Google Home compatible)
- Three Working Modes: Self-locking, Interlocking, Inching
- Dual Voltage Support: AC/DC 7-32V and AC 85-250V
- RF Control (433.92MHz) for Fixed, Rolling, and Learning Code Remotes
- Continued RF functionality even if WiFi is disconnected
- 2-Channel Receiver for controlling two separate automations
- Supports up to 400 remote controllers
- Family Sharing for App control
Key Features (SMG-822)
- RF Control (433.92MHz) for Fixed, Rolling, and Learning Code Remotes
- 2-Channel Receiver for controlling two separate automations
- Supports up to 400 remote controllers
- Power Supply: 12V-24V DC
2. Specifications
Figure 2: SMG-8112 vs SMG-822 Specifications
SMG-8112-SCS (WiFi Version)
| Parameter | Value |
|---|---|
| Channel | 2 |
| Max. Current | 2200W/10A |
| Reception Range | 70-100m |
| Radio Frequency | 433MHz / 433.92MHz |
| Input Voltage | AC/DC 7-32V, AC 85-250V |
| Working Temperature | -20℃ ~ 70℃ |
| Use | Garage Door/Gate Door/Barrier etc. |
| Code Compatibility | Fixed Code, Rolling Code, Learning Code |
| Number of Stored Codes | 55pcs (1 channel) |
| Control Methods | APP, 433MHz Remote, Voice control |
| Mode | Inching, Self-locking, Interlocking |
SMG-822 (RF Only Version)
| Parameter | Value |
|---|---|
| Channel | 2 |
| Frequency | 433.92MHz |
| Material | Metal and PVC |
| Power Supply | 12V-24V DC |
| Dimensions | 8.8cm x 5.5cm x 2.8cm |
| Reception Range | 10-50m (Built-in Aerial antenna) |
| Working Temperature | -40℃ ~ +80℃ |
| Code Compatibility | Fixed, Learning, Rolling Codes |
3. Setup and Installation
3.1 Pre-installation Checklist (SMG-8112-SCS WiFi Version)
- Ensure your smartphone or tablet is connected to a 2.4GHz WiFi network with internet access.
- Enable Bluetooth on your phone for initial pairing.
- Have your WiFi password ready.
- Your smartphone or tablet must have access to an App Store (e.g., Google Play, Apple App Store) to download the Tuya or Smart Life App.
- Ensure your router is MAC-open (if applicable for your network setup).
3.2 Wiring the Receiver
The receiver is designed for easy connection to your control board. You will typically connect 4 wires between the receiver and your control panel (motor or light system).
Figure 3: Wiring Diagram for Motor and Light Control (SMG-8112-SCS)
For the SMG-822 (RF Only) model, the wiring is similar, connecting to the motor or control panel. Refer to the circuit diagram for terminal identification.
Figure 4: General Connection Diagram for Garage/Gate System
Figure 5: Wiring Diagram for Light Control
Terminal Definitions (Refer to Circuit Diagram)
Figure 6: Receiver Circuit Diagram
- **ANT**: Receiver Antenna
- **CH1**: Relay Output 1
- **CH2**: Relay Output 2
- **V+ / U+**: Voltage + (Power Input)
- **GND**: Ground (Power Input)
- **COM**: Common terminal for relay output
- **Open**: Normally Open contact for relay output
- **Close**: Normally Closed contact for relay output
3.3 Pairing 433MHz RF Remote Controls
This applies to both SMG-8112-SCS and SMG-822 models.
- **Learning Transmitter's Codes:**
- Press and hold "LEARN1" or "LEARN2" button on the receiver for 2 seconds (for SMG-8112-SCS) or 1 second (for SMG-822). The "learn_led" light will illuminate.
- While the "learn_led" is lit, press the desired button on your 433MHz remote control.
- The "learn_led" will flash and then go out, indicating that the remote's code has been successfully stored.
- Repeat these steps for other remote controls you wish to pair.
- **Erasing Transmitter's Codes:**
- Press and hold "LEARN1" or "LEARN2" button on the receiver.
- Continue holding until the "learn_led" light illuminates and then goes out. This action will erase all previously stored remote control codes for that channel.
Figure 7: Remote Control Pairing Overview
Video 1: Demonstrates programming a rolling code remote control to the receiver and then controlling it via the Tuya App.
3.4 Tuya App Setup (SMG-8112-SCS Only)
- Download and install the "Tuya Smart" or "Smart Life" app from your device's app store.
- Register or log in to your account.
- Ensure the SMG-8112-SCS receiver is powered on and within range of your 2.4GHz WiFi network.
- Open the app and follow the on-screen instructions to add a new device. The app should automatically detect the receiver if Bluetooth is enabled on your phone and the receiver is in pairing mode (red light flashing rapidly).
- If not automatically detected, manually add the device, selecting the appropriate device type (e.g., "Switch" or "Garage Door Opener").
- Enter your WiFi network name and password when prompted.
- Once connected, you can rename the device and access its control interface.
4. Operating Instructions
4.1 Working Modes (SMG-8112-SCS)
The SMG-8112-SCS receiver supports three working modes:
- **Inching Mode:** The relay activates for a set duration (2-3600 seconds) after a single trigger, then automatically deactivates. This is ideal for momentary actions like opening a garage door and having it automatically close after a set time.
- **Toggle Mode:** Pressing the button once activates the relay, and pressing it again deactivates it. This acts like a standard on/off switch.
- **Latched Mode:** Pressing one button activates the relay, and pressing a different button deactivates it. This is useful for controlling two separate functions where one action cancels the other.
You can set the Inching mode duration within the Tuya/Smart Life App's timing options.
Figure 8: Inching Setting Example
4.2 App Remote Control (SMG-8112-SCS Only)
Once the SMG-8112-SCS is successfully added to the Tuya/Smart Life App:
- Open the Tuya/Smart Life App on your smartphone or tablet.
- Select the receiver device from your device list.
- Use the virtual buttons within the app to control your connected garage door, gate, or lights.
- You can also set countdown timers for automatic closing/opening.
Figure 9: App Remote Control in Use
Figure 10: Tuya App Interface for Device Control
4.3 Voice Control (SMG-8112-SCS Only)
The SMG-8112-SCS is compatible with Amazon Alexa and Google Home. After linking your Tuya/Smart Life account to your voice assistant, you can use voice commands to control your devices. For example:
- "Alexa, open the garage door."
- "Hey Google, close the gate."
4.4 RF Remote Control
Both SMG-8112-SCS and SMG-822 models can be controlled using paired 433MHz RF remote controls. Simply press the corresponding button on your remote to activate the programmed function (e.g., open/close garage door).
Figure 11: RF Remote Control Operation
4.5 Family Sharing (SMG-8112-SCS Only)
You can share control of your SMG-8112-SCS receiver with family members through the Tuya/Smart Life App. This allows multiple users to control the connected devices without needing to re-pair or set up individually.
Figure 12: Family Sharing Feature
5. Maintenance
The SCS SENTINEL receiver is designed for low maintenance. To ensure optimal performance:
- Keep the receiver in a dry, protected environment, away from direct moisture and extreme temperatures.
- Periodically check wiring connections to ensure they are secure.
- For remote controls, replace batteries as needed.
- Clean the exterior of the receiver with a soft, dry cloth if it becomes dusty. Do not use harsh chemicals or abrasive cleaners.
6. Troubleshooting
If you encounter issues with your SCS SENTINEL receiver, consider the following:
- **Receiver not responding to remote control:**
- Ensure the remote control's battery is not depleted.
- Verify that the remote control has been correctly programmed to the receiver (refer to Section 3.3).
- Check the reception range (10-100m depending on model and environment). Obstacles can reduce range.
- **SMG-8112-SCS not connecting to WiFi/App:**
- Confirm your WiFi network is 2.4GHz. The device does not support 5GHz WiFi.
- Ensure your smartphone's Bluetooth is enabled during the initial pairing process.
- Check your WiFi password for accuracy.
- Reset the device to pairing mode (red light flashing rapidly) and try the app setup again.
- Verify your router settings (e.g., MAC filtering).
- **Device not powering on:**
- Check the power supply connections and ensure the correct voltage (AC/DC 7-32V or AC 85-250V for SMG-8112-SCS; 12V-24V DC for SMG-822) is being provided.
- Ensure all wiring is secure and correctly connected.
- **Voice control not working (SMG-8112-SCS Only):**
- Ensure your Tuya/Smart Life account is correctly linked to your Alexa or Google Home app.
- Verify the device name in the voice assistant app matches the name you are using in your commands.
- Check your internet connection.
7. User Tips
- **Model Selection:** When purchasing, carefully check the model number (SMG-8112-SCS for WiFi functionality, SMG-822 for RF-only) to ensure it meets your specific needs.
- **Signal Strength:** For optimal RF performance, ensure the receiver's antenna is not obstructed and is positioned for best reception.
- **App Customization:** Take advantage of the Tuya/Smart Life App's features like setting custom timers for automatic actions (e.g., closing the garage door after a specific delay).
- **Security:** Regularly check for firmware updates for the SMG-8112-SCS model via the Tuya/Smart Life app to ensure the latest security patches and features.
8. 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. All inquiries are typically answered within 24 hours.