This example demonstrates how to use the X-NUCLEO-IDB05A1 component with one of the STM32 Nucleo platforms to obtain heart rate information:

X- NUCLEO-IDB05A1 Datasheet

For the sake of simplicity and portability, the sensor in this case has been abstracted using a counter which counts up to a threshold and then recycles. The code can be easily extended to use the real heart rate sensor.

Technical details are better presented in the mbed Classic equivalent of this example.

Setup¶

First, attach the X-NUCLEO-IDB05A1 to the STM32 Nucleo platform as shown here:

To see the heart rate information on your phone, you need download BLE Scanner App: - nRF Master Control Panel for Android - LightBlue for iPhone

Compile and Run¶

1. Import Program3_BLEHeartRate to your online compiler.
2. Update the BLE_API library if it is outdated.
3. Compile the example with flag: -DIDB0XA1_D13_PATCH or add the line #define IDB0XA1_D13_PATCH to X_NUCLEO_IDB0XA1/x_nucleo_idb0xa1/x_nucleo_idb0xa1_targets.h
4. Remove all instances of LED1 in main.cpp as the shield’s LED is on the same line as SPI CLK which will prevent the board from working
5. Now press Compile. A file downloads (BLE_HeartRate_IDB0XA1_NUCLEO_F429ZI.bin).
6. Drag the file to the 'NODE_F429ZI' disk. The LED on the board will flash.
7. After flashing, hit the 'Reset' button to start the program.
8. Now open the BLE scanner on your phone. Start a scan.
9. Find your device; it should be named `bluenrg!`.
10. Click the connect to establish the connection with your device.
11. Click the Heart Rate Measurement. If you can see some notification from the device, congratulations!