8051多级通讯主机-从机1-从机2，主机作为中间环节；max485作为提供A\B线传送沟通； 手动改变滑动变阻器（从机2采集）控制电机调速（从机2）-max485_8051_master_slaver1_slaver2: 8051 multi-level communication master- slave slave 1- 2, the host as the intermediate links max485 provided as A \ B cable to transfer

用keil可以打开，8051单片机用pid算法控制电机转速313333333331(With keil can open, 8051 microcontroller with PID algorithm to control motor speed 313333333331)