To achieve this temperature alarm, two modules must be used: the temperature sensor temperature to retrieve the temperature value and the buzzer module which will serve as an alert to the user. 

Here is the connection to be made: 
- Connect the Shield Grove to the card connectors. 
- Connect, using the Grove cable, the temperature module to one of the analog ports. We will choose port A1.
- Connect the buzzer using the Grove cable to port D3.



Be careful to check the position of the 3V slider on the Grove shield to obtain good values.

Let's get to programming now! 

The program that we are going to create will make it possible to trigger the buzzer according to a temperature limit threshold. 
In a refrigerator, the temperature should not exceed 5°C to ensure good food preservation. 

We are going to use a condition: if 'the temperature exceeds 5°C' then "activate the buzzer" in the program.

Here are the 3 blocks to use: 
- "If .... then", available in the Logic of the blocks to define the condition
- "[T° sensor] temperature in °C on pin A1", available in the Sensors, to retrieve the value of the module
- [Buzzer/Speaker] play the frequency ... during ...on D3", available in the Actuators of the block locker.




Use the interface to create the temperature alarm program: 


Launch the simulator to check that your program is running correctly or download it to the card. 

You succeeded ? Perfect, you now know how to program a temperature alarm using your NUCLEO-L476RG card! 
Discover the other activities of the Starter kit by clicking on the icons below.