How does stm32 set the threshold with Bluetooth

How Stm32 sets the threshold with Bluetooth is as follows:

1, liquid crystal display temperature and humidity value.

2. There are three buttons, through which the alarm thresholds of temperature and humidity can be set. You can also set the alarm threshold of temperature and humidity through Bluetooth APP and GSM SMS. If the temperature exceeds the temperature threshold or the humidity is lower than the humidity threshold, the water pump is started and the buzzer gives an alarm; Otherwise, the water pump will not start and give an alarm.

3. Through the fourth key, you can control the on-off of the relay with one key. You can also control the on-off of the relay through mobile phone Bluetooth and GSM.

4. The temperature and humidity information is uploaded to the mobile APP in real time. If the temperature and humidity exceed the threshold, the mobile APP will receive an alarm message and report the information via GSM SMS.