1. Introduction
Thank you for choosing the ThermoPro TP357 Bluetooth Indoor Thermometer and Hygrometer. This device is designed to provide accurate temperature and humidity readings for your indoor environment, allowing you to monitor conditions in various rooms with ease. With its smart app connectivity and data logging capabilities, maintaining an optimal indoor climate has never been simpler.

Image: Three ThermoPro TP357 units alongside a smartphone showing the companion app interface with temperature and humidity graphs. This illustrates the product's core functionality and smart features.
2. Key Features
- 80m Bluetooth Range: Monitor temperature and humidity from an extended range, even across different rooms in your home.
- Highly Accurate Measurement: Temperature readings from -20 ℃ to 60 ℃ (± 0.5 ℃ accuracy) and humidity from 10% to 99% rH (± 2% accuracy).
- Real-time Updates: Readings update automatically every 10 seconds for current environmental conditions.
- Innovative Smart App: Connect and track data from up to 20 sensors. Set custom temperature and humidity alerts.
- 1-Year Graphical Data: Review historical temperature and humidity data through clear graphs within the app for up to one year.
- Compact Design with Large Digits: Easy-to-read display with a comfort emoticon indicator. Features a foldable table stand and wall-mounting option.

Image: An illustration highlighting key features of the ThermoPro TP357, including Comfort Indicator, F/C Selector, Large Numbers, Smart App, Alert Notifications, and Historic Data. The device is shown in a home environment.
3. Setup Guide
3.1. Installing Batteries
- Locate the battery compartment on the back of the ThermoPro TP357 unit.
- Open the battery cover.
- Insert 3 AAA batteries (included) into the compartment, ensuring correct polarity (+/-).
- Close the battery cover securely. The device will power on automatically.
3.2. Downloading the ThermoPro Sensor App
The ThermoPro Sensor App is essential for accessing all smart features and historical data. It is compatible with both iOS and Android devices.
- Scan the QR code provided in the product packaging or search for "ThermoPro Sensor" in your device's app store (Apple App Store for iOS, Google Play Store for Android).
- Download and install the app.
- Ensure Bluetooth is enabled on your smartphone or tablet.
3.3. Pairing the Device with the App
- Open the ThermoPro Sensor App on your smartphone.
- Follow the on-screen instructions to add a new device. The app will automatically search for nearby TP357 units.
- Select your TP357 device from the list to establish a Bluetooth connection.
- Once connected, the current temperature and humidity readings will appear in the app.

Image: A visual representation of the ThermoPro TP357 integrated into a smart home monitoring system, demonstrating its 80m Bluetooth coverage and the ability to monitor multiple sensors via the app.
4. Operating Instructions
4.1. Understanding the Display
The TP357 features a clear LCD display showing current temperature and humidity. An emoticon icon indicates the comfort level based on humidity:
- Dry: Humidity below 30%
- Comfort: Humidity between 30% and 60%
- Wet: Humidity above 60%

Image: The ThermoPro TP357 display showing the comfort indicator with a face icon, illustrating the different humidity levels (Dry, Comfort, Wet) and their corresponding ranges.
4.2. Using the Smart App
The ThermoPro Sensor App provides advanced monitoring and control features:
- Real-time Monitoring: View live temperature and humidity readings from all connected sensors.
- Historical Data: Access daily, weekly, and yearly graphs of temperature and humidity trends. This data helps identify patterns and optimize your environment.
- Customizable Alerts: Set minimum and maximum temperature and humidity thresholds. Receive push notifications on your smartphone if readings fall outside your desired range.
- Multiple Device Support: Connect and manage up to 20 TP357 sensors simultaneously.

Image: A smartphone screen displaying the ThermoPro app with alarm settings for temperature and humidity, and a notification bell indicating real-time alerts. This demonstrates the app's ability to notify users when conditions exceed preset limits.

Image: The ThermoPro app interface illustrating the device's 10-second fast response time, showing how quickly data is updated and displayed in real-time graphs.
5. Maintenance
5.1. Cleaning
To clean your ThermoPro TP357, wipe it with a soft, damp cloth. Do not use abrasive cleaners or immerse the device in water.
5.2. Battery Replacement
When the display becomes dim or the device loses connectivity, it's time to replace the batteries. Follow the steps in Section 3.1 to replace the 3 AAA batteries. Use alkaline or lithium batteries for optimal performance.
5.3. Storage
If storing the device for an extended period, remove the batteries to prevent leakage and damage.
6. Troubleshooting
| Problem | Possible Cause / Solution |
|---|---|
| Device not turning on. | Check battery polarity. Replace batteries if they are depleted. |
| Cannot connect to the app. |
|
| Inaccurate readings. |
|
| App not showing historical data. | Ensure the device has been connected to the app regularly to sync data. Data is stored on the device and transferred to the app when connected. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | TP357-3 |
| Temperature Range | -20 ℃ to 60 ℃ (-4 ℉ to 140 ℉) |
| Temperature Accuracy | ± 0.5 ℃ (± 0.9 ℉) |
| Humidity Range | 10% to 99% RH |
| Humidity Accuracy | ± 2% RH |
| Bluetooth Range | Up to 80 meters (260 feet) |
| Update Rate | Every 10 seconds |
| Power Source | 3 x AAA Batteries (included) |
| Product Dimensions | 5.4 x 5.4 x 1.7 cm (2.1 x 2.1 x 0.7 inches) |
| Weight | 150 grams (5.3 ounces) |
| Mounting Options | Tabletop stand, Wall mount, Integrated magnet |

Image: A visual comparison of the ThermoPro TP357's compact size next to an egg, highlighting its small footprint and large, easy-to-read digits.
8. Warranty and Support
ThermoPro products are designed for durability and reliability. For warranty information and customer support, please refer to the official ThermoPro website or contact their customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
For further assistance, visit the ThermoPro support page or contact their customer service team. Details can typically be found on the product packaging or the official ThermoPro website.





