Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Brand | Xiaomi |
| Model Number | LYWSD03MMC |
| Connectivity | Bluetooth 5.0 BLE |
| Display Type | LCD E-Ink Screen |
| Power Source | 1 x CR2032 Battery |
| Battery Life | Approx. 12 Months |
| Temperature Range | -9.9°C to 60°C |
| Humidity Range | 0% to 99% RH |
| Measurement Accuracy | ±0.3°C, ±3% RH |
| Product Dimensions | 43 x 43 x 13 mm |
Anonymous
Apr 09, 2026
Rating: 5/5
Perfect for wine cellar
Keeping track of storage conditions is easy now. Compact size fits anywhere without being obtrusive.
Anonymous
Feb 23, 2026
Rating: 5/5
Great little sensor
Very accurate compared to my old thermometer. The screen is easy to read and the battery life seems solid so far.
Anonymous
Feb 04, 2026
Rating: 4/5
Good but range limited
Bluetooth range is okay for single room use. If you walk too far away the app disconnects, but that is expected for BLE.
Anonymous
Jan 27, 2026
Rating: 3/5
App connectivity issues
Sometimes disconnects and requires re-pairing. Hardware is fine but the software experience could be smoother.
Anonymous
Jan 21, 2026
Rating: 5/5
Best value monitor
Bought three for different rooms. They all sync well with the gateway. Highly recommend for smart home setups.
Q: Does it alert on high temperature?
A: Yes, you can set custom temperature and humidity thresholds in the app to receive notifications.
Q: Is it waterproof for outdoor use?
A: No, this device is designed for indoor use only and is not water-resistant.
Q: How do I replace the battery?
A: Slide the bottom cover open gently using the notch, replace the CR2032 battery, and close the cover.
Q: Does it work with Apple HomeKit?
A: Not directly. It requires a Xiaomi gateway or third-party bridge to integrate with HomeKit.
Q: Can I view history data?
A: Yes, the Mi Home app stores temperature and humidity history graphs for up to 30 days.
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