NModbus4 读取串口设备数值

使用NModbus4 读取串口

1　　　　  public static void aget()
2        {
3            byte[] array = new byte[8];
4            using (SerialPort port = new SerialPort("COM3"))
5            {
6                port.BaudRate = 9600;
7                port.DataBits = 8;
8                port.Parity = Parity.None;
9                port.StopBits = StopBits.One;
10                port.Open();
11                array[0] = 253;
12                array[1] = 3;
13                array[2] = 1;
14                array[3] = 0;
15                array[4] = 0;
16                array[5] = 2;
17                array[6] = 209;
18                array[7] = 203;
19                port.Write(array, 0, 8);
20                port.ReadTimeout = 1000;
21                Thread.Sleep(800);
22                if (port.BytesToRead > 0)
23                {
24
25                    IModbusSerialMaster master = ModbusSerialMaster.CreateRtu(port);
26
27                    byte slaveId = 1;
28                    ushort startAddress = 100;
29                    ushort[] registers = new ushort[] { 1, 2, 3 };
30
31                    // write three registers
32                    //ushort[] shorts =  master.r(slaveId, 0, 80);
33
34                    while (true)
35                    {
36                        ushort[] shorts2 = master.ReadHoldingRegisters(slaveId, 0, 5);
37
38                        double sd = double.Parse(shorts2[0].ToString());
39                        double wd = double.Parse(shorts2[1].ToString());
40                        Console.Clear();
41                        Console.ForegroundColor = ConsoleColor.Green;
42                        Console.WriteLine("湿度:" + sd / 10 + "%");
43
44                        Console.WriteLine("温度:" + wd / 10 + " ℃");
45                        Thread.Sleep(1000);
46                    }
47
48                }
49                //port.BytesToRead
50            }
51        }

设备信息

精讯畅通的 高精度温湿度传感器RS485温湿度计 大棚防雨水工业级4-20ma

设备的数值

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