Problem Explanation：
1. Mi Temperature and Humidity Monitor and Mi Bluetooth gateway are bound under the same Xiaomi account.
2. Mi Temperature and Humidity Monitor is close to the Mi Bluetooth gateway (the closer the better).
3. Mi Bluetooth gateway has been connected to the network,after the above operation, the Mi Temperature and Humidity Monitor and the Bluetooth gateway can be automatically connected after waiting for a period of time. When the Mi Temperature and Humidity Monitor can display historical data, it means that Mi Temperature and Humidity Monitor and the Bluetooth gateway have been connected.If turn off phone Bluetooth at this time, the temperature and humidity meter value can also be checked, and the temperature and humidity meter reading can also be checked in the Bluetooth gateway. Taking Mi Home security camera as an example, the viewing path is: open Mi Home security camera >>click the three points in the upper right corner >>click general Settings >>and click the Bluetooth gateway.