51单片机通过18B20温度传感器采集温度数据，通过单片机串口接收指令，然后通过串口发出。串口接蓝牙模块，实现了温度在手机上的显示。-51 single-chip temperature data collected by 18B20 temperature sensor, through the microcontroller serial receive instruction, and then sent through the serial port. Serial port to ac