1. Product Overview
The mumubiz WiFi TH-16 Smart Switch is a universal smart home device designed for remote and automatic control of appliances via a mobile application. It integrates temperature and humidity monitoring, allowing for automated operation based on environmental conditions. This smart switch also provides real-time power consumption statistics and supports voice control through popular smart assistants.
Key Features:
- App Support: Free iOS and Android mobile App (Tuya Smart / Smart Life).
- Sync Status: Real-time device status provided to the App.
- Real-time Monitoring: Monitors real-time temperature, humidity, and power consumption.
- Remote ON/OFF: Control electrical devices from anywhere with high accuracy using the cht8305 sensor.
- Share Control: Easily share control of your smart home devices with family members.
- Timing: Supports 8 enabled countdown/single/repeat timing tasks for scheduled operation.
- Auto Mode: Automatically turns devices on/off based on a specified temperature or humidity range.
- Manual Mode: Allows immediate manual control (on/off).
- Smart Scene Trigger: Temperature and humidity values can trigger smart scenes with other Tuya smart devices.
- Voice Control: Compatible with Amazon Alexa, Google Home, and Google Nest.
- High Accuracy Sensor: Features a cht8305 sensor for precise temperature and humidity readings.
2. Package Contents
Please check the package for the following items:
- 1 x Smart Switch
- 1 x cht8305 Temperature and Humidity Sensor (1m line length)

Image: Smart Switch and cht8305 Sensor in the package.
3. Setup Guide
3.1 Pre-installation Checklist
Before proceeding with installation, ensure the following:
- The WiFi Switch must operate within a 2.4GHz WiFi environment.
- You have the correct WiFi password for your network.
- Your smartphone or tablet has access to the App Store (iOS) or Google Play Store (Android).
- Your router is configured to allow MAC addresses (MAC-open).
- Your smartphone or tablet is connected to a 2.4GHz WiFi network with internet access.
- Bluetooth is enabled on your phone for initial setup.
3.2 Wiring Instructions
WARNING: Ensure the power supply is completely disconnected before performing any wiring to prevent electric shock.
- Identify the Live (L) and Neutral (N) wires from your AC 85-250V power supply.
- Connect the Live (L) wire to the 'L' terminal under 'IN' on the Smart Switch.
- Connect the Neutral (N) wire to the 'N' terminal under 'IN' on the Smart Switch.
- Identify the Live (L) and Neutral (N) wires of the appliance you wish to control.
- Connect the appliance's Live (L) wire to the 'L' terminal under 'OUT' on the Smart Switch.
- Connect the appliance's Neutral (N) wire to the 'N' terminal under 'OUT' on the Smart Switch.
- Plug the cht8305 temperature and humidity sensor into the designated port on the Smart Switch.

Image: Wiring diagram showing input and output connections for the Smart Switch.
3.3 App Installation and Device Pairing
- Download the App: Search for "Tuya Smart" or "Smart Life" in your mobile device's app store (iOS App Store or Google Play Store) and install it.
- Register/Login: Open the app and register for a new account or log in if you already have one.
- Reset Device: Power on the Smart Switch. Hold down the 'Reset' button for approximately 6 seconds until the network indicator (red light) starts blinking fast (0.5 seconds/time). This puts the device into pairing mode.
- Add Device in App: In the app, click the "+" icon in the top right corner. The app will search for nearby devices. Once the Smart Switch is found, click "Add".
- Connect to Wi-Fi: Select your 2.4GHz Wi-Fi network and enter the correct password.
- Name Device: Once connected, you can name your device for easy identification.

Image: Visual guide for app installation, device reset, and pairing process.
4. Operating Instructions
4.1 App Remote Control
Once the device is successfully paired, you can control and monitor it using the Tuya Smart / Smart Life app:
- Real-time Data: View current temperature and humidity readings from the cht8305 sensor.
- Switch Control: Manually turn the connected appliance ON or OFF.
- Autowork Mode: Enable 'Autowork' to automatically control the appliance based on preset temperature or humidity ranges.
- Heating Mode: Set a target temperature. The switch will turn on the heating appliance when the current temperature falls below the target.
- Cooling Mode: Set a target temperature. The switch will turn on the cooling appliance when the current temperature rises above the target.
- Statistics: Access historical data for temperature, humidity, and energy consumption (daily, monthly, yearly).
- Scheduling: Set up countdowns, single-time, or recurring schedules to automate appliance operation.
- Device Sharing: Share control of the switch with other users through the app.

Image: App interface showing current temperature, humidity, and switch control.

Image: App interface demonstrating heating mode settings and automatic control.

Image: App interface displaying real-time and historical power consumption data.
4.2 Voice Control
The Smart Switch is compatible with Amazon Alexa, Google Home, and Google Nest. Link your Tuya Smart / Smart Life account to your voice assistant app to enable voice commands.
Example Commands:
- "Alexa, turn on power switch."
- "Hey Google, turn off the heater."
Video: Demonstration of Alexa voice control, heating mode, cooling mode, and statistics.

Image: Visual representation of voice control compatibility with Amazon Alexa and Google Assistant.
4.3 Wi-Fi + BLE Functionality
The device supports both Wi-Fi and Bluetooth Low Energy (BLE) connectivity. If the Wi-Fi network becomes disconnected, the Smart Switch will automatically switch to a Bluetooth connection, allowing you to maintain local control via your phone.

Image: Diagram illustrating the Wi-Fi + BLE feature for continuous control.
5. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Environment: Avoid exposing the device to extreme temperatures, high humidity, or direct sunlight.
- Wiring Check: Periodically inspect the wiring connections to ensure they are secure and free from damage.
- Firmware Updates: Keep the Tuya Smart / Smart Life app updated to ensure the latest features and security patches for your device.
6. Troubleshooting
6.1 Common Issues and Solutions
- Device not connecting to Wi-Fi:
- Ensure your Wi-Fi network is 2.4GHz.
- Verify the Wi-Fi password is correct.
- Check if your router's MAC filtering is disabled or the device's MAC address is allowed.
- Ensure your phone's Bluetooth is enabled during pairing.
- Try resetting the device and re-pairing.
- App not finding device during pairing:
- Make sure the device is in fast blinking mode (red light).
- Ensure your phone is close to the device and connected to the same 2.4GHz Wi-Fi network.
- Voice control not working:
- Ensure your Tuya Smart / Smart Life account is correctly linked to your voice assistant (Alexa, Google Home).
- Check your internet connection.
- Verify the device name in the voice assistant app matches the name in the Tuya app.
- Temperature/Humidity readings are inaccurate:
- Ensure the cht8305 sensor is properly connected and not obstructed.
- Avoid placing the sensor in direct sunlight or near heat/cold sources that could affect readings.
6.2 Remote Control Matching (for models with RF Remoter)
If your model includes an RF Remoter, follow these steps for matching:
- Hold the manual switch on the Smart Switch for 3 seconds. The RF pairing indicator (blue light) will turn on.
- Long press the buttons on the remote control.
- Matching is successful when the blue light on the Smart Switch responds.
6.3 Clear Code (for models with RF Remoter)
To clear the remote control code:
- Long press the manual switch on the Smart Switch for 15 seconds.
- Loosen the switch when the RF pairing indicator (blue light) turns off and then flashes rapidly for 5 times.
Note: The matching/clear code method is only available with RF function switch/module reference.

Image: App interface showing settings and troubleshooting options, including remote control matching/clear code instructions.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | MS22100801 |
| Input Voltage | AC 85V-250V |
| Max Current | 16A |
| Total Power | 3000W |
| Wireless Standard | 2.4GHz, 802.11 b/g/n |
| WiFi Frequency | 2.4G |
| Communication Method | RF, Wi-fi |
| Security Mechanism | WPA-PSK/WPA2-PSK |
| Control Mode | Mobile APP Tuya Smart / Smart Life |
| Platform Support | Android, iOS |
| Voice Control Compatibility | Alexa, Google Home |
| Gang | 1 |
| TH Sensor | cht8305 |
| Display Resolution | 0.1 ℃ / 1% RH |
| Temperature Range | -20℃ - 100℃ (Error < ±0.5℃) |
| Humidity Range | 5% RH - 90% RH (Error < ±5.0%RH) |
| Enclosure Material | Fire-retardant ABS V0 |
| Operating Temperature | 0ºC-40ºC |
| Smart Switch Size | 94*57*32 mm |
| State of Assembly | Ready-to-Go |
| Compatibility | All Compatible |
| Certification | CE, FCC, RoHS |
| Origin | Mainland China |
8. User Tips
- The compact size (93*55*31mm) makes it versatile for various installations.
- Leverage voice control with Alexa or Google Home for hands-free operation of connected devices.
- The wide temperature range of -20℃ to 100℃ allows for monitoring in diverse environments.
- This product is compatible with a broad range of scenarios, making it a flexible smart home solution.
- With a total power capacity of 3000W, it can handle most household appliances.
- For optimal performance, ensure a stable 2.4GHz WiFi connection.
9. Warranty and Support
For technical support, troubleshooting assistance, or warranty inquiries regarding your mumubiz Smart Switch (Model: MS22100801), please contact the seller or refer to the support section within the Tuya Smart / Smart Life application. Keep your purchase records handy for any warranty claims.