1. Overview
The mumubiz eWelink Smart TH16/TH16RF Switch is a universal smart switch designed for remote and automatic control of appliances. It integrates temperature monitoring capabilities using a DS18B20 sensor, allowing devices to be turned on or off based on predefined temperature ranges. This smart switch supports timing functions, scene triggers, and voice control through popular smart home platforms.
Key Features:
- App Support: Free eWelink mobile App for iOS and Android.
- Sync Status: Real-time device status updates provided to the App.
- Real-time Monitor: Monitors real-time temperature.
- Remote ON/OFF: Turn electrical devices on/off from anywhere with the high-accuracy waterproof DS18B20 sensor.
- Share Control: Control your smart home devices collaboratively with family members.
- Timing: Supports up to 8 enabled countdown, single, or repeat timing tasks.
- Auto Mode: Automatically turns devices on/off at a specified temperature range.
- Manual Mode: Allows immediate manual control (on/off).
- Trigger Smart Scene: Temperature values can act as smart scene triggers for other eWelink devices.
- Voice Control: Compatible with Amazon Alexa, Google Home, and Google Nest.
- Durable Sensor: Features a waterproof temperature sensor with a stainless steel probe for high accuracy and wide application.
2. Specifications
| Parameter | Value |
|---|---|
| Brand Name | mumubiz |
| Model Number | TH-16 / TH-16RF (MS22051901) |
| Communication Method | RF, Wi-Fi |
| Compatibility | All Compatible |
| Certification | CE, FCC, RoHS |
| Input Voltage | AC 85V-250V |
| Max Current | 16A |
| Total Power | 3000W |
| WiFi Standard | 2.4GHz, 802.11 b/g/n |
| Material | Fire-retardant ABS V0 |
| Size | 94*57*32 mm |
| APP | eWelink |
| Voice Assistant Compatibility | Alexa, Google Home, Google Nest |
| Operating Temperature | 0ºC-40ºC |
| Operating Humidity | 5%-90%RH, Non-condensing |
DS18B20 Temperature Sensor Specifications:
| Parameter | Value |
|---|---|
| Type | Waterproof temperature sensor |
| Probe | Stainless steel temperature probe |
| Temperature Measuring Range | -20℃~+100℃ |
| Operating Voltage | 3.0-5.5V |
| Length | 1m |
| Weight | 26g |
3. Setup
3.1. Pre-installation Checklist
- Ensure your smartphone or tablet is connected to a 2.4GHz Wi-Fi network with internet access.
- Have your Wi-Fi password readily available.
- Enable Bluetooth on your smartphone or tablet.
- Ensure your device has access to the App Store (iOS) or Google Play (Android).
- Verify your router is MAC-open.
3.2. Wiring Diagram
Caution: For safety, ensure the sensor is connected before powering on the device. Do not touch the sensor socket while the device is powered.


3.3. App Installation and Device Pairing
- Download the eWelink App: Search for "eWelink" in your device's App Store (iOS) or Google Play (Android) and install it.
- Register/Login: Register a new eWelink account or log in if you already have one.
- Power Up: Connect the TH-16 Smart Switch to power according to the wiring diagram.
- Observe LED Status: Once powered, check the status of the blue LED light on the device. There are two main statuses:
- Quick Blinking (3 times quickly, then steady for 1 second): This indicates Quick Pairing mode. Proceed to step 5.
- Slow Blinking (flashes once every 3 seconds): This indicates Compatible Mode. Long press the manual switch button until the LED blinks rapidly (as in Quick Pairing mode), then proceed to step 5.
- Add Device in App:
- Open the eWelink App.
- Tap the "+" icon in the upper right corner of the interface.
- Select "Add Device".
- The app will search for nearby devices. Once your device is found, tap "+" next to it.
- Select your 2.4GHz Wi-Fi network and enter the correct Wi-Fi password. Tap "Next".
- Wait for the device to connect. Once successfully added, tap "Done".

4. Operating Instructions
4.1. Basic App Functions

- Remote ON/OFF: Tap the power icon in the eWelink app to turn your connected appliance on or off from anywhere.
- Synchronous Switching State: The app displays the real-time status of the switch.
- Share Control: Grant control permissions to other eWelink users (family members) to manage the device.
- Timing Schedules: Set up single, repeat, countdown, or loop timers for automated operation. The app supports up to 8 timing tasks.
- Smart Scene Control: Use the temperature readings from the DS18B20 sensor as conditions to trigger other smart home devices or scenes within the eWelink ecosystem.


4.2. Temperature-Based Automatic Control (Auto Mode)
The TH-16 Smart Switch can automatically turn devices on or off based on temperature thresholds detected by the DS18B20 sensor.
- In the eWelink app, navigate to the device settings for your TH-16 switch.
- Select the 'Auto' tab.
- Set the desired temperature thresholds for turning the device ON (e.g., Temp. Higher than 29.0°C) and OFF (e.g., Temp. Lower than 27.0°C).
- Enable the 'Auto' mode. The device will now operate automatically based on these settings.

4.3. Inching Function
The inching function allows the device to turn on for a brief, set duration before automatically turning off. This is useful for momentary actions.
- In the eWelink app, go to the device settings for your TH-16 switch.
- Find 'Inching Settings' or 'Inching duration'.
- Set the desired duration for the inching function (e.g., 0.5 seconds).
- Enable the inching function. When activated, the device will turn on for the set duration and then turn off.
4.4. Voice Control
The TH-16 Smart Switch is compatible with Amazon Alexa and Google Home/Nest for voice commands.
- Ensure your eWelink account is linked to your Alexa or Google Home app.
- Once linked, you can use commands such as:
- "Alexa, turn on Thermostat."
- "OK Google, turn on the switch."

4.5. Remote Control Pairing (TH-16RF model only)
If you have the TH-16RF model, you can pair it with an RF remote control.
- Matching:
- Hold the manual switch button on the TH-16RF for 3 seconds until the RF pairing indicator (red light) turns on.
- Then, long press the desired button(s) on your RF remote control.
- Release the remote control button(s) once matching is successful.
- Clear Code:
- Long press the manual switch button for 15 seconds (the RF pairing indicator will be continuously on).
- Loosen the manual switch button until the RF pairing indicator (red light) turns off and then flashes rapidly 5 times. This clears all paired remote controls.

5. Maintenance
To ensure optimal performance and longevity of your eWelink Smart TH16 Switch, keep the device clean and free from dust. Avoid exposing it to extreme temperatures or humidity outside of its specified operating conditions. Regularly check wiring connections for security. If the device is not in use for an extended period, consider disconnecting it from power.
6. Troubleshooting
6.1. Solutions for Product Matching Failure and Offline Issues
- From the eWelink App homepage, click the profile icon (usually in the lower right corner).
- Navigate to "Message" > "Guide" or "Profile" > "Ewelink support" for detailed troubleshooting articles.
- If the issue persists, try using another phone or a personal hotspot to re-add the device. This can help rule out local network or phone-specific problems.

6.2. Common Issues & Solutions
- Device not connecting to Wi-Fi: Ensure your Wi-Fi network is 2.4GHz, you have entered the correct password, and your router is not blocking new devices (MAC-open). Try moving the device closer to the router.
- Inaccurate Temperature Readings: Ensure the DS18B20 sensor is properly connected and immersed in the environment you wish to monitor. Avoid placing the sensor near heat sources that could skew readings.
- Voice Control Not Working: Verify that your eWelink account is correctly linked to your Alexa or Google Home app. Check that the device name in eWelink is recognized by your voice assistant.
7. User Tips
- Humidity Monitoring: Please note that the included DS18B20 sensor only detects temperature. If you require humidity monitoring, you will need to acquire a separate humidity sensor. The TH-16 switch does not currently support humidity sensors.
- Power Capacity: The switch supports a maximum current of 16A and a total power of 3000W. This is generally sufficient for most household appliances, including electric boilers (up to 3000W) and pumps (e.g., 1HP motor is approx. 746W). Always ensure the connected appliance's power consumption does not exceed the switch's limits, especially considering starting currents for motors.
- Brand and App: While the product brand is mumubiz, it is designed to work seamlessly with the eWelink app, providing a familiar smart home experience.
- Standalone Operation: The device requires a 2.4GHz Wi-Fi connection and the eWelink app for full functionality. It cannot operate entirely without a network connection or the associated application.
- Extension Cable: If the included sensor cable length is insufficient, extension cables are available for purchase.
8. Support
For further assistance or inquiries, please contact mumubiz support at: info@mumubiz.com
A detailed user manual in PDF format is also available for download: View User Manual (PDF)





