NModbus4 读取串口设备数值

使用NModbus4 读取串口

public static void aget()
  {
      byte[] array = new byte[8];
      using (SerialPort port = new SerialPort("COM3"))
      {
          port.BaudRate = 9600;
          port.DataBits = 8;
          port.Parity = Parity.None;
          port.StopBits = StopBits.One;
          port.Open();
          array[0] = 253;
          array[1] = 3;
          array[2] = 1;
          array[3] = 0;
          array[4] = 0;
          array[5] = 2;
          array[6] = 209;
          array[7] = 203;
          port.Write(array, 0, 8);
          port.ReadTimeout = 1000;
          Thread.Sleep(800);
          if (port.BytesToRead > 0)
          {
 
              IModbusSerialMaster master = ModbusSerialMaster.CreateRtu(port);
 
              byte slaveId = 1;
              ushort startAddress = 100;
              ushort[] registers = new ushort[] { 1, 2, 3 };
 
              // write three registers
              //ushort[] shorts =  master.r(slaveId, 0, 80);
 
              while (true)
              {
                  ushort[] shorts2 = master.ReadHoldingRegisters(slaveId, 0, 5);
 
                  double sd = double.Parse(shorts2[0].ToString());
                  double wd = double.Parse(shorts2[1].ToString());
                  Console.Clear();
                  Console.ForegroundColor = ConsoleColor.Green;
                  Console.WriteLine("湿度:" + sd / 10 + "%");
 
                  Console.WriteLine("温度:" + wd / 10 + " ℃");
                  Thread.Sleep(1000);
              }
 
          }
          //port.BytesToRead
      }
  }