Introduction
The ThermoPro TP357 is a digital Bluetooth-connected thermometer and hygrometer designed for monitoring indoor temperature and humidity. This device connects to your smartphone via a dedicated app, allowing for remote monitoring, historical data tracking, and real-time alerts. It helps you maintain a healthy and comfortable environment in various indoor spaces.

Package Contents

- 1 x ThermoPro TP357 Thermometer Hygrometer
- 1 x Instruction Manual
Note: One AAA battery is required and not included in the package.
Setup
1. Battery Installation
- Locate the battery compartment on the back of the device.
- Open the battery compartment cover.
- Insert one AAA battery, ensuring correct polarity (+/-).
- Close the battery compartment cover.
2. App Download and Pairing
- Download the ThermoPro APP from the App Store (for iOS devices) or Google Play (for Android devices).
- Enable Bluetooth on your smartphone.
- Open the ThermoPro APP. The app will automatically search for and connect to your TP357 device.
- Once connected, you will see the current temperature and humidity readings from your device on the app interface.
3. Device Placement
The TP357 offers multiple convenient placement options:
- Desktop Stand: Use the integrated stand to place the device on any flat surface, such as a table or shelf.
- Hanging Hole: Utilize the hanging hole on the back to mount the device on a wall.
- Magnetic Back: The device features a magnetic back, allowing it to be attached to metallic surfaces like refrigerators.

Operating Instructions
1. Device Display
The large LCD screen on the TP357 displays the current temperature and humidity. It also features a face icon comfort indicator to quickly assess the environment:
- Dry: Humidity below 30%
- Comfort: Humidity between 30% and 60%
- Wet: Humidity above 60%

2. Temperature Unit Selection
You can switch between Celsius (°C) and Fahrenheit (°F) directly on the device or through the smartphone app.
3. Smartphone App Features
The ThermoPro app provides enhanced monitoring capabilities:
- Remote Monitoring: View real-time temperature and humidity from up to 80 meters (260 feet) away via Bluetooth.
- Data History: Access historical temperature and humidity data for the last 24 hours, 1 week, or 1 year. The app also displays Max/Min records.
- Real-time Alerts: Set custom temperature and humidity ranges within the app. If readings go beyond these preset ranges, your smartphone will receive a notification.
- Fast Response: The sensor provides data updates every 10 seconds for accurate, real-time information.



Maintenance
1. Cleaning
Wipe the device with a soft, damp cloth. Do not use abrasive cleaners or immerse the device in water.
2. Battery Replacement
When the battery icon appears on the display, replace the AAA battery to ensure continuous operation and accurate readings.
Troubleshooting
- No Display: Check if the battery is installed correctly with the right polarity. Replace the battery if necessary.
- Bluetooth Connection Issues: Ensure Bluetooth is enabled on your smartphone and the device is within the 80m range. Try restarting both the device and the app.
- Inaccurate Readings: Ensure the device is placed in a stable environment away from direct sunlight, heat sources, or drafts that could affect readings. Allow some time for the sensor to stabilize after placement.
- App Notifications Not Working: Check your smartphone's notification settings for the ThermoPro app to ensure they are enabled. Verify that the temperature and humidity alarm ranges are correctly set in the app.
Specifications

| Feature | Specification |
|---|---|
| Model Number | TP357 |
| Temperature Range | -4°F to 140°F (-20°C to 60°C) |
| Temperature Accuracy | ±1.0°F (±0.5°C) |
| Humidity Range | 10% to 99% |
| Humidity Accuracy | ±2% RH |
| Wireless Range | 260ft / 80m (Bluetooth) |
| Power Source | 1 x AAA Battery (Not included) |
| Display Type | DIGITAL |
| Display Size | 2.0 - 3.9 Inches |
| Refresh Rate | 10 seconds |
| Comfort Indicator | Dry (<30%), Comfort (30-60%), Wet (>60%) |
| Certification | CE |
Applications
The ThermoPro TP357 is suitable for a wide range of indoor environments, including but not limited to:
- Bedrooms
- Offices
- Nurseries
- Wine Cellars
- Greenhouses
- Incubators

User Tips
- For optimal Bluetooth range, ensure there are no major obstructions (thick walls, large metal objects) between the device and your smartphone.
- Place the device in a central location within the room you wish to monitor for the most representative readings.
- Regularly check the app for historical data to identify trends in your indoor environment and make necessary adjustments.
Warranty and Support
ThermoPro products are designed for quality and reliability. If you encounter any issues or have questions regarding your TP357 device, please contact ThermoPro customer support for assistance. Refer to the official ThermoPro website or the contact information provided in your product packaging for support details.





