PC机利用MSCOMM控件通过串口访问下位机，下位机实现DS18B20温度采集，采集数据通过串口上传PC机，PC机利用NTGRAPH控件绘制出温度曲线图！-PC, via serial port access control using MSCOMM the lower position, the next crew to achieve DS18B20 the temperature acquisition, collecting data through serial port PC, up