基于51的MODBUS-RTU多机主从通信，汇编语言编写-It is written in assembly language, with beginners learning, has a certain model.

温控器程序，实现温度采集，开关控制，实时时钟，液晶驱动，modbus通信等功能-Thermostat procedures, temperature acquisition, switch control, real-time clock, an LCD driver, modbus communications and other functions