Xiaomi has introduced a new gadget for smart home enthusiasts: the Mijia Smart Temperature and Humidity Sensor 3 Mini. The compact climate tracker is now available for crowdfunding on Xiaomi Mall and Xiaomi Youpin, with the campaign starting on February 19. While the suggested retail price is 34.9 yuan (~$5), backers can get it at a discounted 29.9 yuan (~$4) during the campaign.
Mijia Smart Temperature and Humidity Sensor 3 Mini Specs
At just 43 × 43 × 12.5mm, the Mijia 3 Mini is compact and lightweight, making it easy to place anywhere. Compared to its predecessor, the Mijia Bluetooth Temperature and Humidity Sensor 2, this model features a larger 2.1-inch LCD screen with a slimmer 5.1mm bezel. The upgraded design offers more screen space for better visibility, making temperature and humidity readings easier to check at a glance.
The sensor delivers 0.1°C accuracy for temperature and 1%RH precision for humidity, with real-time data refreshes every six seconds. Xiaomi says this level of precision helps users maintain a comfortable indoor climate, ideally between 19-27°C and 20%-85%RH.
Beyond basic monitoring, the Mijia 3 Mini connects to Xiaomi’s smart home ecosystem through Bluetooth Mesh. It can be paired with a Mijia Bluetooth gateway to automate home appliances via the Mijia app. Users can set up triggers for their air conditioners or humidifiers to activate automatically based on temperature changes.
It also supports voice control via Xiao Ai, Xiaomi’s smart assistant, allowing hands-free access to real-time temperature and humidity updates.
Battery performance is another highlight. The sensor runs on a CR2450 button battery, offering up to three years of battery life in long-lasting mode or two years in standard mode. The longer endurance setting increases battery life by about 50%, but at the cost of slightly slower automation response times.
Xiaomi has included a visual comfort indicator using emoji symbols. A smiley face appears when conditions are ideal, while a frowning face signals discomfort.
For users who want to track environmental changes over time, the sensor supports three months of on-device data storage and six months of cloud storage via the Mijia app. This makes it easier to analyze trends and adjust home conditions accordingly.
The Mijia 3 Mini is designed to fit seamlessly into any space. It comes with double-sided adhesive stickers for easy wall mounting, making it suitable for bedrooms, living rooms, offices, or even bathrooms, as long as it is kept away from direct water exposure. Its small size also makes it a convenient travel companion for monitoring hotel room conditions.
Built from high-quality ABS materials, the sensor is durable and resistant to wear. However, it is not waterproof, so users should avoid excessive moisture or submersion in water.
In related news, Xiaomi has expanded its smart home lineup with the Mijia Central Air Conditioner Pro and introduced a new ultra-thin smart fridge featuring dual cooling and a freezing capability of -30°C.
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