taipingwanzhongjiv4(1)

代码说明：

说明：  用STM32F103C8T6的3组串口，分别连接cdebyte的无线收发模块，usar1接收到上位机命令，通过usart2向下转发，USart2接收到下位机数据，再由USart1向上转发， 实现中继转发功能。(Three groups of serial ports of stm32f103c8t6 are used to connect the wireless transceiver module of cdebyte. Usar1 receives the command from the upper computer, usar2 forwards downward, usar2 receives the data, and then usar1 forwards upward to realize the relay forwarding function.)