MMC Temperature Humidity Sensor Smart Linkage Indoor Hygrometer Thermometer PM2 5 HCHO Air…

Miaomiaoce Air Quality Detector is a smart sensor. It is designed to report environmental or occupancy events for monitoring and automation. Protocol, gateway and app requirements are important because they determine which automations are available.

The product is compatible with Xiaomi Home / Mi Home for the exact version described here. The Miaomiaoce detector content explicitly states that it works with the Mijia app.

Listed variants is MHO-H301 (HCHO) / MHO-H501 (PM2.5+HCHO); Battery is 2500 mAh rechargeable lithium battery; Wireless connectivity is Wi-Fi 2.4 GHz; Power input is 5 V / 1 A; Temperature range is 0–60 °C; Humidity range is 0–99% RH.

For reliable automations, position the sensor according to its documented range and avoid obstacles or environmental conditions that can distort readings. Battery-powered sensors should also be checked periodically even when the app reports battery status. A compatible gateway is required whenever the device does not communicate directly over Wi-Fi.

For automations, match the sensor to the documented protocol and gateway. Region-specific Mi Home devices may require the Mainland China region, while Smart Life, Aqara Home or other ecosystems are not interchangeable with Mi Home.