Sms via a nokia phone over a serial port
- by abigblackman
Hi,
I'm trying to send a sms via a Nokia phone over serial which is easy enough via putty. The commands from the nokia documentation works fine.
However, trying to send the same commands from a c# application fails miserably. I've run Sysinternals PortMon and can see the commands come through OK, the only difference I can see is in the way it connects but I am having trouble finding the commands that would iron out those differences.
The code I'm running looks a little bit like this
using (SerialPort port = new SerialPort(comPort, 9600, Parity.None, 8, StopBits.One))
{
port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
port.ErrorReceived += new SerialErrorReceivedEventHandler(port_ErrorReceived);
//port.ReceivedBytesThreshold = 1;
port.DtrEnable = true;
port.RtsEnable = true;
port.ReadTimeout = 1;
port.Handshake = Handshake.XOnXOff;
try
{
port.Open();
port.WriteLine("AT");
port.WriteLine("AT+CMGF=1");
port.WriteLine("AT+CMGS=\"" + number + "\"");
port.WriteLine(message);
port.Write(new byte[] { (byte)26 }, 0, 1);
}
finally
{
if (port.IsOpen)
{
port.Close();
}
}
The differences I'm seeing in the trace from the serial port are
At the start
0.00001844 aspnet_wp.exe IOCTL_SERIAL_SET_HANDFLOW USBSER001 SUCCESS Shake:1 Replace:43 XonLimit:4096 XoffLimit:4096
And at the very end
0.00061153 aspnet_wp.exe IOCTL_SERIAL_PURGE USBSER001 SUCCESS Purge: RXABORT RXCLEAR
0.00004442 aspnet_wp.exe IOCTL_SERIAL_PURGE USBSER001 SUCCESS Purge: TXABORT TXCLEAR
Has anyone got any tips on how to iron out these issues? I also notice that the phone is not responding back to the application with any acknowledgement when I issue a command so I suspect the problem is with the connection, not those messages at the end.
