Bluetooth Classic and Bluetooth LE examples for STM32 and Android
Bluetooth Classic tutorial: https://www.youtube.com/watch?v=TtpLcsQ4nMw
Works with HC-06 or HC-05 modules. Other Bluetooth classic modules should work too.
Bluetooth LE tutorial: https://www.youtube.com/watch?v=zRJctDUt-Zg
Works with JDY-08 module. For other Bluetooth LE modules, you need to modify UUIDs of service and characteristic which has read and write descriptor. It is located in BluetoothLeService.java file.
For RFID I have used this library, which I have modified: https://github.com/soonuse/pn532-lib/blob/master/examples/stm32/stm32.7z
RFID project example uses PN532 to read UID from RFID card and then send it as a string to the Android app via Bluetooth.
RFID Tutorial: https://www.youtube.com/watch?v=ARtuPrKluho
Displaying data from BMP280 in a chart: https://www.youtube.com/watch?v=MlOEx_Op3w8
For this project I have used this library via Gradle - those are amazing charts: https://github.com/PhilJay/MPAndroidChart
Wiring diagram:
Module wiring modification for I2C:
ECG tutorial video: https://www.youtube.com/watch?v=gboCV7RqehE
ECG 2 wire configuration (single lead):
ECG 3 wire configuration (single lead):
ECG electrode placement and heart potertial:
ECG waveform:
