1. Introducció
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. Característiques del producte
- Sortida de contacte sec i màxima de 20 A: Supports connection of high-load devices up to 20A and provides dry contact output for flexible control.
- Pantalla LCD: Features a clear LCD screen for real-time monitoring of temperature and humidity data, updated every 5 seconds.
- Consulta de l'historial de temperatura/humitat: Permet 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.
- Control automàtic local: 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.
- Control i consulta per veu: 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. Contingut del paquet
En obrir el paquet, assegureu-vos que hi hagi tots els elements i que estiguin en bon estat:
- 1 x SONOFF THR320D Smart Temperature and Humidity Monitoring Switch
- 1 x Manual d'usuari (aquest document)
- Other accessories as specified on the product packaging (e.g., DIN rail adapter)
4. Producte acabatview i Components
Familiarize yourself with the main components of the SONOFF THR320D:

Figure 4.1: Key components and features of the SONOFF THR320D.
- Pantalla LCD: Mostra la temperatura i la humitat en temps real.
- Botó de mode automàtic: Double click to enable/disable automatic control.
- Contacte sec: Supports normally closed and normally open configurations.
- Muntatge en carril DIN: Accompanied by a rail adapter for easy installation.
- Upgraded Wiring Terminal: Designed to prevent short circuits.
- Funda protectora: Enhances safety by covering wiring terminals.
5. Configuració i instal·lació
5.1 Instruccions de cablejat
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 Descàrrega i emparellament de l'aplicació
- 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. Funcionament
6.1 Control manual
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. Compatibilitat dels sensors
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.
| Tipus de sensor | Descripció | Especificacions |
|---|---|---|
| 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 | Cable d'extensió del sensor | Conductor Resistance: max.10Ω, Connector: RJ9 4P4C, Insulation Resistance: min.5MΩ, Cable Length: 5m |
8. Funcions avançades
8.1 Control de LAN
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 Control de veu
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.

Figura 8.1: Control per veu amb Alexa i Google Home.
9. Especificacions
| Atribut | Valor |
|---|---|
| Dimensions del producte | 4.25 x 2.56 x 1.54 polzades |
| Número de model de l'article | THR320D |
| Fabricant | SONOFF |
| Mode d'operació | ON-OFF-ON |
| Valoració actual | 20 Amps |
| Vol. Operatiutage | 120 Volts |
| Tipus de contacte | Normalment tancat |
| Tipus de connector | RJ9 4P4C |
| Terminal | Cargol |
| Tipus de circuit | 2 vies |
| Tipus d'actuador | Electronic lever |
10. Solució De Problemes
If you encounter issues with your SONOFF THR320D, refer to the following common troubleshooting steps:
- Dispositiu fora de línia: 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.
- Lectures inexactes: 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.
- L'automatització no funciona: 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.
- Problemes de control de veu: 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.
- Sense energia: 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. Manteniment i cura
- Neteja: Feu servir un drap suau i sec per netejar el dispositiu. No utilitzeu productes de neteja abrasius ni dissolvents.
- Medi ambient: Operate the device within its specified temperature and humidity ranges. Avoid exposure to extreme conditions, direct sunlight, or moisture.
- Actualitzacions de firmware: Consulteu regularment l'aplicació eWeLink per obtenir actualitzacions de firmware disponibles per garantir un rendiment i una seguretat òptims.
12. Garantia i Suport
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.





