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 t