Sending Unicode Messages (such as in Persian and Arabic) in C# using AT Commands through GSM Modem

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I have finally found out how to resolve this problem. As I said in in the “Additional Information” section of my question, sending line ends with line feeds caused this mismatching between SerialPort in C# and AT commands in hyperterminal for sending Unicode messages. I have just replaced \r with \n line feeds. The modified code is as follow:

GSMPort.Write("AT\n");
Thread.Sleep(1000);
GSMPort.Write("AT+CSCS=\"UCS2\"\n");
Thread.Sleep(1000);
GSMPort.Write("AT+CMGF=1\n");
Thread.Sleep(1000);
GSMPort.Write("AT+CMGS=\"" + destinationNumber + "\"\n");
Thread.Sleep(1000);
GSMPort.Write("0633064406270645" + "\x1A");

Leave SerialPort.Encoding and SerialPort.NewLine properties unchanged. It is not necessary to change their default values, just set AT+CSCS="UCS2" to send messages in Unicode format.

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