使用AT命令通过双卡手机发送短信

本文关键字：手机 AT 命令 使用 | 更新日期: 2023-09-27 18:13:14

我编写了一个使用AT命令发送SMS的应用程序，如下所示:

SerialPort _serialPort = new SerialPort("COM40", 115200);
Thread.Sleep(1000);
_serialPort.Open();
Thread.Sleep(1000);
_serialPort.Write("AT+CMGF=1'r");
Thread.Sleep(1000);
_serialPort.Write("AT+CMGS='"" + toPhoneNumber + "'"'r'n");
Thread.Sleep(1000);
_serialPort.Write("Test" + "'x1A");
Thread.Sleep(1000);
_serialPort.Close();

如果安装了电话并且COM端口号可用，则此代码可以正常工作。

当双卡手机连接到电脑时，是否有办法选择从哪个SIM卡发送信息?

使用AT命令通过双卡手机发送短信

3GPP规范中没有定义标准的AT命令。似乎各个设备制造商已经定义了自己的AT命令来选择SIM卡，例如这个。

联系设备制造商，询问他们对此有什么定义

public string ExecCommand(SerialPort port, string command, int responseTimeout, string errorMessage)
    {
        try
        {
            port.DiscardOutBuffer();
            port.DiscardInBuffer();
            receiveNow.Reset();
            Thread.Sleep(200);
            port.Write(command + "'r");
            string input = ReadResponse(port, responseTimeout);
            if ((input.Length == 0) || ((!input.EndsWith("'r'n> ")) && (!input.Contains("'r'nOK'r'n"))))
                throw new ApplicationException("No success message was received.");
            return input;
        }
        catch (Exception ex)
        {
            //int a = ErrorCmd(port);
            throw ex;
        }
    }
    public void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
    {
        try
        {
            if (e.EventType == SerialData.Chars)
            {
                receiveNow.Set();
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
    public string ReadResponse(SerialPort port, int timeout)
    {
        string buffer = string.Empty;
        try
        {
            do
            {
            //Thread.Sleep(5000);
            jump: if (receiveNow.WaitOne(timeout, false))
                {
                    string t = port.ReadExisting();
                    buffer += t;
                }
                else
                {
                    if (buffer.Length == 0)
                    {
                        goto jump;
                    }
                    if (buffer.Length > 0)
                    {
                        //goto jump;
                        throw new ApplicationException("Response received is incomplete.");
                    }
                    else
                        throw new ApplicationException("No data received from phone.");
                }
            }
            while (!buffer.Contains("'r'nOK'r'n") && !buffer.EndsWith("'r'n> ") && !buffer.EndsWith("'r'nERROR'r'n"));
        }
        catch (Exception ex)
        {
            throw ex;
        }
        return buffer;
    }
public string ExecCommand(SerialPort port, string command, int responseTimeout, string errorMessage)
    {
        try
        {
            port.DiscardOutBuffer();
            port.DiscardInBuffer();
            receiveNow.Reset();
            Thread.Sleep(200);
            port.Write(command + "'r");
            string input = ReadResponse(port, responseTimeout);
            if ((input.Length == 0) || ((!input.EndsWith("'r'n> ")) && (!input.Contains("'r'nOK'r'n"))))
                throw new ApplicationException("No success message was received.");
            return input;
        }
        catch (Exception ex)
        {
            //int a = ErrorCmd(port);
            throw ex;
        }
    }
    public void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
    {
        try
        {
            if (e.EventType == SerialData.Chars)
            {
                receiveNow.Set();
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
    public string ReadResponse(SerialPort port, int timeout)
    {
        string buffer = string.Empty;
        try
        {
            do
            {
            //Thread.Sleep(5000);
            jump: if (receiveNow.WaitOne(timeout, false))
                {
                    string t = port.ReadExisting();
                    buffer += t;
                }
                else
                {
                    if (buffer.Length == 0)
                    {
                        goto jump;
                    }
                    if (buffer.Length > 0)
                    {
                        //goto jump;
                        throw new ApplicationException("Response received is incomplete.");
                    }
                    else
                        throw new ApplicationException("No data received from phone.");
                }
            }
            while (!buffer.Contains("'r'nOK'r'n") && !buffer.EndsWith("'r'n> ") && !buffer.EndsWith("'r'nERROR'r'n"));
        }
        catch (Exception ex)
        {
            throw ex;
        }
        return buffer;
    }
相关文章：