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
}
}
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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