ModbusType.Rtu question

[SirJo]

my code
var comPort = GetComPort(); //COM5
var slaveAddress = GetSlaveAddress(); //3
//var registerAddresses = GetRegisterAddresses();

var _utility = new ModbusUtility(ModbusType.Rtu, comPort, slaveAddress, 0, Endian.BigEndianLsb);
await _utility.ConnectAsync();

while (true)
{
object[] receivedBytes = (await _utility.GetDatasAsync("4X 0", new KeyValuePair<Type, int>(typeof(ushort), 2))).Datas;

}

question
receivedBytes is always null and I am sure I get this data by serialPort
10 00 00 00 02 04 04 80 00 00 F8 CF

What am i doing wrong?

[DannielZhang]

I didn't working on this for a long time… did u fixed it?