C#上位机小软件：串口接收、实时显示温湿度传感器的数据（下位机已经处理好的，直接取出），不包含数据存储功能，包含一个灯的自定义控件，可用作提示报警。(C# upper computer small software,serial port receiving,real-time display of temperature and humidity sensor data (which has been processed by the lower computer and taken out