The best known interface is USB. I show in this article, how to connect and catch data from STM32 bluepill board in 15 minutes.
If you have issue with flashing BluePill I have for you 2 solutions.
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Accelerometer is a very usefull sensor for detecting movement. In this project I use simply settings LSM303D sensor and LCD PCD8544 display. In this settings I choose BluePill board – STM32F103C8T6 microprocessor
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RFID reader is device to read card and lock/unlock some kind of functions. General driver RFID is RC522 module. Microcontroler send information to alphanumerical display HD44780 and Bluetooth terminal HC-05.