1. Introduction
The SONOFF THR320D is a smart temperature and humidity monitoring switch designed to provide real-time environmental data and intelligent control over connected appliances. With a 20A maximum load capacity and dry contact output, it offers versatile applications for various home and industrial settings. This device integrates seamlessly with smart home ecosystems like Amazon Alexa and Google Home, allowing for voice control and automated routines based on temperature and humidity thresholds.
Figure 1.1: SONOFF THR320D Smart Temperature and Humidity Monitoring Switch with its retail packaging.
2. Product Features
- 20A Max & Dry Contact Output: Supports connection of high-load devices up to 20A and provides dry contact output for flexible control.
- LCD Display: Features a clear LCD screen for real-time monitoring of temperature and humidity data, updated every 5 seconds.
- Temperature/Humidity History Query: Allows review of historical temperature and humidity data by hour, day, and month. Up to 6 months of historical data can be exported in .xlsx format.
- Local Automatic Control: Supports LAN control for reliable automatic operation even without an internet connection. Users can set up to 8 automatic control programs for energy saving and comfort.
- Voice Control and Query: Compatible with Amazon Alexa and Google Home for voice commands to control the switch and query temperature/humidity values.
Figure 2.1: Key features of the SONOFF THR320D.
3. Package Contents
Upon opening the package, ensure all items are present and in good condition:
- 1 x SONOFF THR320D Smart Temperature and Humidity Monitoring Switch
- 1 x User Manual (this document)
- Other accessories as specified on the product packaging (e.g., DIN rail adapter)
4. Product Overview and Components
Familiarize yourself with the main components of the SONOFF THR320D:
Figure 4.1: Key components and features of the SONOFF THR320D.
- LCD Screen: Displays real-time temperature and humidity.
- Auto Mode Button: Double click to enable/disable automatic control.
- Dry Contact: Supports normally closed and normally open configurations.
- DIN Rail Mounting: Accompanied by a rail adapter for easy installation.
- Upgraded Wiring Terminal: Designed to prevent short circuits.
- Protective Cover: Enhances safety by covering wiring terminals.
5. Setup and Installation
5.1 Wiring Instructions
Ensure power is disconnected before performing any wiring. Follow the diagrams carefully for safe and correct installation.
Figure 5.1: 1-Channel Load Wiring Diagram. Connect 100-240V AC to L In and N, and the load (e.g., light bulb) to L Out and N.
Figure 5.2: Dry Contact Wiring Diagram. Connect external devices to COM, NC (Normally Closed), or NO (Normally Open) terminals as required.
5.2 App Download and Pairing
- Download the eWeLink App: Scan the QR code on the product packaging or visit http://app.coolkit.cc/dl.html to download the eWeLink app for Android or iOS.
- Register and Log In: Open the eWeLink app and follow the prompts to register a new account or log in if you already have one.
- Add Device: Power on the SONOFF THR320D. Open the eWeLink app, tap the '+' icon to add a device. Follow the in-app instructions to put the device into pairing mode and connect it to your Wi-Fi network.
- Rename Device: Once successfully added, you can rename the device for easier identification in the app and for voice control.
6. Operation
6.1 Manual Control
You can manually turn the device on or off directly from the eWeLink app at any time, from anywhere with an internet connection.
Figure 6.1: Manual control via the eWeLink App.
6.2 Automatic Control (Auto Mode)
The THR320D supports automatic control based on temperature and humidity thresholds. You can set up to 8 automatic control programs to optimize energy consumption and maintain a comfortable environment.
Figure 6.2: Setting up Auto Mode in the eWeLink App.
6.3 Timely Notifications and Scene Automation
Receive push notifications on your phone when temperature or humidity reaches a preset threshold or when the device's on/off state changes. You can also create smart scenes to automate actions with other smart devices.
Figure 6.3: Notifications and Scene Automation examples.
6.4 History Data
The device stores temperature and humidity data for up to 6 months. You can view this data by hour, day, or month within the app and export it as an .xlsx file.
Figure 6.4: Accessing and exporting historical data.
7. Sensor Compatibility
The SONOFF THR320D features an RJ9 4P4C interface for connecting various sensors, supporting hot-plugging for stable and reliable connections.
Figure 7.1: Compatible Sensors for SONOFF THR320D.
| Sensor Type | Description | Specifications |
|---|---|---|
| THS01 | Temperature & Humidity Sensor for monitoring environment. | Working Temp: -40℃~+85℃, Working Humidity: 0-100%RH, Connector: RJ9 4P4C, Cable Length: 0.5m, Max Extend: 60m |
| DS18B20 | Waterproof Temperature Sensor for liquid temperature monitoring. | Working Temp: -55℃~+125℃, Connector: RJ9 4P4C, Cable Length: 0.5m, Max Extend: 60m |
| MS01 | Soil Moisture Sensor for monitoring soil moisture. | Humidity Measuring: 0-100%RH, Connector: RJ9 4P4C, Operating Temp: 0-60℃, Cable Length: 0.5m, Max Extend: 10m |
| RL560 | Sensor Extension Cable | Conductor Resistance: max.10Ω, Connector: RJ9 4P4C, Insulation Resistance: min.5MΩ, Cable Length: 5m |
8. Advanced Features
8.1 LAN Control
The THR320D supports LAN control, allowing the device to operate automatically and reliably even if your internet connection is temporarily unavailable. This ensures continuous monitoring and control within your local network.
8.2 Voice Control
Integrate your SONOFF THR320D with Amazon Alexa or Google Home for convenient voice control. You can turn the switch on/off or query the current temperature and humidity values using simple voice commands.
Figure 8.1: Voice control with Alexa and Google Home.
9. Specifications
| Attribute | Value |
|---|---|
| Product Dimensions | 4.25 x 2.56 x 1.54 inches |
| Item Model Number | THR320D |
| Manufacturer | SONOFF |
| Operation Mode | ON-OFF-ON |
| Current Rating | 20 Amps |
| Operating Voltage | 120 Volts |
| Contact Type | Normally Closed |
| Connector Type | RJ9 4P4C |
| Terminal | Screw |
| Circuit Type | 2-way |
| Actuator Type | Electronic lever |
10. Troubleshooting
If you encounter issues with your SONOFF THR320D, refer to the following common troubleshooting steps:
- Device Offline: Check your Wi-Fi connection. Ensure the device is within range of your router. Restart the device and your router. Re-pair the device if necessary.
- Inaccurate Readings: Ensure the sensor is properly connected to the RJ9 4P4C port. Check for any physical damage to the sensor or cable. Calibrate the sensor if the app provides such an option.
- Automation Not Working: Verify that your automatic control programs are correctly configured in the eWeLink app. Check if LAN control is enabled and functioning if you are relying on local automation.
- Voice Control Issues: Ensure your device is correctly linked to Alexa or Google Home. Check the device name for any conflicts or difficult-to-pronounce words. Verify your internet connection.
- No Power: Check the wiring connections according to the diagrams in Section 5.1. Ensure the power source is active.
For further assistance, please refer to the official SONOFF support resources or contact customer service.
11. Maintenance and Care
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Environment: Operate the device within its specified temperature and humidity ranges. Avoid exposure to extreme conditions, direct sunlight, or moisture.
- Firmware Updates: Regularly check the eWeLink app for available firmware updates to ensure optimal performance and security.
12. Warranty and Support
For information regarding product warranty, returns, and technical support, please visit the official SONOFF website or refer to the warranty card included with your product. Support contact details may also be available within the eWeLink app.
