Arduino串口通讯，发送1开始采集，对A0-A4口轮询采集，并打印出来，每一路数据分别以a,b,c,d,e标识,适合新手-Arduino serial communication, send 1 to start collection, the A0-A4 port polling collection, and print out, each way the data were a, b, c, d, e logo