在前4个数码管上显示当前采集到的温度。注意显示温度精度程序的编写，用串口将采集到的温度数据实时发送至上位机，在上位机软件商显示当前温度值。-4 digital tube display currently collected temperature. Note to display the temperature accuracy of program preparation, real-time temperature data will be collected using the seri