1. Take Xiaomi 8 as an example, and open the "Temperature Control Baby" app dedicated to the little squirrel on the mobile phone, as shown in the following figure:

2. Then click the "+"in the figure to add a temperature control device.

There are "square" and "round" thermostats. Click on your own thermostat type.

4. Press and hold the "Set" and "+"keys on the thermostat panel for three seconds at the same time in the shutdown state to enter the engineering mode.

5. Then press and hold the "Set Key" to turn the page, and the interface will display "06" for one-key pairing.

6. Then press the "+"key, and the wifi status flashes, indicating that the constant temperature wifi connection is successful.

7. When the RF signal appears, it means that the thermostat is successfully connected with the wall-hung boiler.

8. Then manually adjust the temperature in the thermostat, as shown in the figure below:

Source-Baidu