单片机与PC机串口通信程序，单片机采集温度和电压通过1602显示并传到PC上显示。1602可以换屏显示三个界面，还有修改上下门限。还有报警功能。-Microcontroller serial communication with the PC program, microcontroller collection display temperature and voltage through 1602 and reached the PC display. 1602 exchange for the three interface screen display, as well as modify the upper and lower threshold. There are alarm.