一对蓝牙模块相互通信，一块接电脑，另一块接单片机。单片机通过串口将接受 到的数据在lcd上显示出来-A Bluetooth module to communicate with each other, one connected to the computer, another a connected microcontroller. Microcontroller through the serial port to receive the data displayed on the lcd

可以通过串口1发送指令控制4个IO口，以实现小车8个方向的行驶，带差速转弯功能(You can control 4 IO ports by sending 1 commands through the serial port, so that the car can drive in 8 directions, with differential turn function.)