BalancedCar 藍芽透過MCU傳資料到電腦顯示 藍芽與MCU連接要TX和RX相接 Motor 1 PWM control (PA0) Motor 1 Direction control (PA2) Motor 2 PWM control (PA1) Motor 2 Direction control (PA3) 參考資料 : https://github.com/QCopter