1. Introduction
Thank you for choosing the TONGOU TOVTH-216WTTDA DIN Rail WiFi Smart Switch. This device integrates a high-precision temperature and humidity sensor with dual-channel smart switching capabilities, allowing for advanced environmental monitoring and automation in various settings. This manual provides essential information for safe installation, operation, and maintenance of your smart switch.
2. Safety Information
WARNING/ADVERTISEMENT/ADVERTENCIA/AVISO/ПРЕДУПРЕЖДЕНИЕ/AVVERTIMENTO/OSTRZEŻENIE/WAARSCHUWING/Varning/경고/警告
- The Smart devices must be installed and maintained under the guidance of professionals who possess the skills and knowledge related to the manufacture and operation of electrical equipment and its installation. These individuals should have undergone safety training to identify and avoid potential hazards.
- If you find any damage to the Smart devices upon opening the package, do not install the device.
- The Smart devices must be installed in a distribution cabinet or inside the distribution cabinet, isolated by doors or baffles to prevent unauthorized or accidental access.
- The installation and use of the Smart devices must comply with all applicable local, regional, and national regulations.
- When installing the Smart devices, a professional installation engineer must verify that the mechanical strength and electrical conductivity are satisfactory.
- We are not responsible for any consequences resulting from non-compliance with this document and other related documents.
3. Product Overview
The TONGOU TOVTH-216WTTDA is a versatile smart switch designed for precise environmental monitoring and control. It features a high-accuracy temperature and humidity sensor, dual-channel power control, and seamless integration with popular smart home platforms like Tuya Smart/Smart Life, Amazon Alexa, and Google Home.
Key Features:
- High-Accuracy Sensor: Real-time temperature monitoring from -25°C to 100°C and humidity tracking from 1% to 99%.
- Comprehensive App Control: View live data, historical trends, receive alerts, and access detailed operation logs via the app.
- Smart Home Integration: Compatible with Tuya Smart/Smart Life, Amazon Alexa, and Google Home for voice control and advanced automation.
- Automation Features: Create custom scenes based on temperature/humidity data, set independent schedules (timers, sunrise/sunset, repeating cycles) for each switch.
- Dual-Channel Power Control: Independent control for two switches (S1 & S2) with high load capacities.
- Customization Options: Per-switch temperature/humidity alerts, manual calibration, and multiple control modes (Local Lock / Remote / Full Control).
- Data Tracking: Daily, monthly, and annual statistics, along with a full operation history with timestamps.
Product Dimensions:

Figure 1: Product Dimensions (Height: 82mm, Width: 50mm, DIN Rail Width: 18mm)
Applications:

Figure 2: Diverse Application Scenarios
Product Demonstration Video:
Video 1: Product features and operation demonstration.
4. Specifications
| Attribute | Value |
|---|---|
| Model Number | TOVTH-216WTTDA |
| Brand Name | TONGOU |
| Type | Mini |
| Is Smart Device | Yes |
| Origin | Mainland China |
| Certification | CE |
| Switch Type | 2-Gang (Dual Channel) |
| Mounting Standard | 18mm DIN Rail/Standard Wall Panel |
| Wireless Protocol | WiFi 2.4GHz |
| Compatible Platforms | Tuya Smart/Smart Life, Alexa, Google Home |
| Temperature Range | -25°C to 100°C |
| Humidity Range | 1% to 99% |
| AC Load Capacity | 16A per channel (100-240V AC, 50/60Hz) |
| AC Max Power | 3840W (Resistive Load) |
| DC Load Capacity | 10A per channel (5-30V DC) |
| DC Max Power | 300W |
| Package Dimensions (L x W x H) | 13cm x 5cm x 5cm |
| Package Weight | 0.25 kg |
5. Setup
5.1 Wiring Diagram
Refer to the wiring diagram below to configure the corresponding equipment and wiring method to ensure the safe operation of the device. S1/S2 provides no output voltage. Use an external power source for loads.

Figure 3: Product Wiring Diagram (S1/S2 Max Load: AC: 16A 100-240VAC, Category AC-1; DC: 10A 5-30VDC)
5.2 App Download and Pairing
To utilize the smart features, download the Smart Life or Tuya Smart app and pair your device.
- Download the App: Scan the QR code below or search for "Smart Life" or "Tuya Smart" in your app store.
- Enter Settings Menu: Long press the 'M' button on the device for 5 seconds to enter the settings menu.
- Network Configuration Mode: The network indicator light will flash blue continuously when the device is in network configuration status.
- Add Device in App: Open the app, tap 'Add Device', and follow the on-screen instructions to connect your smart switch to your Wi-Fi network. Ensure your Wi-Fi is 2.4GHz.

Figure 4: Smart Life App QR Code
6. Operating Instructions
6.1 Indicator Light Description
| Indicator | Status | Meaning |
|---|---|---|
| Switch Indicator Light | Solid Red | Device is ON (closed). |
| Switch Indicator Light | OFF | Device is OFF (open). |
| Network Indicator Light | Solid Blue | Normal communication status. |
| Network Indicator Light | Continuously Flashing Blue | Network configuration status. |
| Network Indicator Light | Blinks Blue once every 4 seconds | Device has lost the network. |
| Network Indicator Light | OFF | Device is not connected to the network. |
| Network Indicator Light | Rapidly Flashing Blue | Device is in AP connection mode. |
| Network Indicator Light | Slowly and Continuously Flashing Blue | Device has an alarm event (local version only). |
6.2 App Control
Once connected to the app, you can monitor and control your smart switch remotely.
- Real-time Monitoring: View current temperature and humidity readings directly in the app.
- Independent Operation: S1 and S2 can be used as separate switches, each supporting individual timing and cycle timing functions.
- Auto Mode: When enabled, the device will automatically shut off once predefined conditions for automatic switching (temperature/humidity thresholds) are met.
- Alarm Shutoff: Configure the device to turn off when specific temperature or humidity thresholds are reached.
- Timing Functions: Set schedules, sunrise/sunset triggers, and repeating cycles for automated control.
- Calibration Functions: Adjust temperature and humidity readings for accuracy.
- Data Statistics: Access temperature and humidity daily, monthly, and yearly logs, as well as device event history.
- Control Modes: Choose between Local Lock (device off, data transmission possible), Local Mode (control only on device), Remote Mode (control only via app), or Full Control Mode.

Figure 5: Multi-function Timer Settings
6.3 Manual Operation
The device can also be turned on/off manually by pressing the S1 or S2 buttons on the unit itself.
6.4 Simultaneous Activation
A single temperature and humidity switch can trigger two devices at the same time, allowing for synchronized control based on environmental conditions.
7. Maintenance
- Regularly check the device for any physical damage or loose connections.
- Keep the device and sensor probe clean and free from dust or debris to ensure accurate readings.
- Ensure the firmware is updated to the latest version through the app for optimal performance and security.
- If the device is installed in a harsh environment, consider periodic professional inspection.
8. Troubleshooting
- Device not connecting to Wi-Fi: Ensure your Wi-Fi network is 2.4GHz. Check if the network indicator light is flashing blue continuously. If not, re-enter pairing mode.
- Inaccurate readings: Use the calibration function in the app to adjust temperature and humidity. Ensure the sensor probe is not obstructed or exposed to extreme conditions.
- Switch not responding: Check the power supply to the device and the connected loads. Verify the control mode in the app (Local Lock, Remote, Full Control).
- Alarms not triggering: Ensure alarm thresholds are correctly set in the app and the alarm shutoff function is enabled for the respective switch (S1/S2).
9. User Tips
- Sensor Cable Length: The standard sensor cable length is typically sufficient for most applications. If a longer cable is required, it may be possible to extend it, but ensure the extension uses appropriate gauge wiring and is properly shielded to avoid interference and maintain accuracy. Consult a professional if unsure.
- Power Outage Resilience: The device is designed to maintain its settings through power outages, ensuring your automation rules remain intact once power is restored.
10. Warranty & Support
10.1 EU Declaration of Conformity
Hereby, Changyou Technology (Zhejiang) Co., Ltd. declares that this product is in compliance with essential requirements and other relevant provisions of Directive 2014/53/EU.
The full text of the EU declaration of conformity is available at: http://www.tongou.com/usermanuals
10.2 WEEE Warning
All products bearing this symbol are waste electrical and electronic equipment (WEEE as in directive 2012/19/EU) which should not be mixed with unsorted household waste. Instead, you should protect human health and the environment by handing over your waste equipment to a designated collection point for the recycling of waste electrical and electronic equipment, appointed by the government or local authorities. Correct disposal and recycling will help prevent potential negative consequences to the environment and human health. Please contact the installer or local authorities for more information about the location as well as terms and conditions of such collection points.
10.3 Contact Support
For technical assistance or support, please contact:
- Email: support@tongou.com
- Website: www.tongou.com
Tongou is a trademark and the property of Changyou Technology, its subsidiaries and affiliated companies.
25V01 @2025 Changyou Technology - All rights reserved.





