Command enable-secure-admin executed successfully.

vi /etc/ssh/sshd_config

Find PermitRootLogin then change it to

PermitRootLogin no

Restart sshd

/etc/init.d/sshd restart

sudo apt-get install python-software-properties
sudo add-apt-repository ppa:ferramroberto/java
sudo apt-get update
sudo apt-get install sun-java6-jdk sun-java6-plugin

You may want to also add the following

sudo update-alternatives --config java

You should get the following

  Selection    Path                                      Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-6-openjdk/jre/bin/java   1061      auto mode
  1            /usr/lib/jvm/java-6-openjdk/jre/bin/java   1061      manual mode
  2            /usr/lib/jvm/java-6-sun/jre/bin/java       63        manual mode

Press enter to keep the current choice[*], or type selection number: 2

Select (2) and press enter

Now running:

java -version

Returns:

java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Server VM (build 20.1-b02, mixed mode)

Enjoy it!

using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading;

namespace ATCommand
{

    class Program
    {
        const string comPort = "COM3";
        const int baudRate = 115200;
        const int dataBits = 8;
        const int parityBit = 1;
        const int readTimeOut = 30000;
        const int writeTimeOut = 30000;
        static Dictionary phoneDict = new Dictionary();
        public AutoResetEvent receiveNow;
        static void Main(string[] args)
        {
            phoneDict.Add('+', "002b");
            phoneDict.Add('0', "0030");
            phoneDict.Add('1', "0031");
            phoneDict.Add('2', "0032");
            phoneDict.Add('3', "0033");
            phoneDict.Add('4', "0034");
            phoneDict.Add('5', "0035");
            phoneDict.Add('6', "0036");
            phoneDict.Add('7', "0037");
            phoneDict.Add('8', "0038");
            phoneDict.Add('9', "0039");

            Program p = new Program();
            SerialPort port = p.OpenPort(comPort, baudRate, dataBits, readTimeOut, writeTimeOut);
            p.sendMsg(port, "+66858989398", "ทดสอบ test2 ^^!    ");
        }

        public SerialPort OpenPort(string p_strPortName, int p_uBaudRate, int p_uDataBits, int p_uReadTimeout, int p_uWriteTimeout)
        {
            receiveNow = new AutoResetEvent(false);
            SerialPort port = new SerialPort();

            try
            {
                port.PortName = p_strPortName;                 //COM1
                port.BaudRate = p_uBaudRate;                   //9600
                port.DataBits = p_uDataBits;                   //8
                port.StopBits = StopBits.One;                  //1
                port.Parity = Parity.None;                     //None
                port.ReadTimeout = p_uReadTimeout;             //300
                port.WriteTimeout = p_uWriteTimeout;           //300
                port.Encoding = Encoding.GetEncoding("iso-8859-1");
                //port.Encoding = Encoding.GetEncoding("UTF-8");
                port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
                port.Open();
                port.DtrEnable = true;
                port.RtsEnable = true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return port;
        }
        /*
        private static byte[] DecodeUtf8(string s_Input)
        {
            bool isOnlyEnglish = true;

            for (int i = 0; i < s_Input.Length; i++)
            {
                if (s_Input[i] > 255)
                {
                    isOnlyEnglish = false;
                    break;
                }
            }
            byte[] u8_Utf;
            if (isOnlyEnglish)
            {
                //return s_Input;
                u8_Utf = new byte[s_Input.Length  + 2];
                for (int i = 0; i < s_Input.Length; i++)
                {
                    u8_Utf[ i ] = (byte)s_Input[i];
                }
                u8_Utf[s_Input.Length] = (byte)0x0d;
                u8_Utf[s_Input.Length + 1] = (byte)0x1A;
                return u8_Utf;
            }
            else
            {
                 u8_Utf = new byte[s_Input.Length*2+2];
                for (int i = 0; i < s_Input.Length; i++)
                {
                    if (s_Input[i] > 255)
                    {
                        u8_Utf[2 * i] = (byte)0x0E;
                    }
                    else
                    {
                        u8_Utf[2 * i] = (byte)0x00;
                    }
                    u8_Utf[2 * i + 1] = (byte)s_Input[i];
                }
                u8_Utf[2 * s_Input.Length] = (byte)0x0d;
                u8_Utf[2 * s_Input.Length + 1] = (byte)0x1A;
                return u8_Utf;
            }

        }
        */
        public static string ConvertPhoneNumber(string phoneNumber)
        {
            StringBuilder sb = new StringBuilder();
            foreach (char c in phoneNumber)
            {
                sb.Append(phoneDict[c]);
            }
            return sb.ToString();
        }
        public static string ConvertMessage(string input)
        {
            StringBuilder sb = new StringBuilder();
            byte[] utf8Byte = Encoding.Unicode.GetBytes(input);
            //for (int i = utf8Byte.Length-1; i >= 0; i--)
            for(int i=0; i 255)
                {
                    isHaveThai = true;
                    break;
                }
            }
            return isHaveThai;
        }
        public bool sendMsg(SerialPort port, string PhoneNo, string Message)
        {
            bool isSend = false;

            //bool isThai = isHaveThai(Message);

            //string tmp = ConvertMessage(Message);
            //return true;

            try
            {

                string recievedData= ExecCommand(port, "AT", 300, "No phone connected");
                recievedData = ExecCommand(port, "AT+CMGF=1", 300, "Failed to set message format.");
                recievedData = ExecCommand(port, "AT+CSCS=\"UCS2\"", 300, "Failed to set unicode format.");
                //recievedData = ExecCommand(port, "AT+CSCA=\"002B00360036003800310036003100310030003400300030\",145", 300, "Failed to set true sms center.");
                recievedData = ExecCommand(port, "AT+CSMP=17,167,0,25", 300, "Failed to set csmp.");

                String command = "AT+CMGS=\"" + ConvertPhoneNumber(PhoneNo) +"\"";

                recievedData = ExecCommand(port, command, 30000, "Failed to accept phoneNo");

                //command = Message + char.ConvertFromUtf32(26) + "\r";
                //command = "0E02" + "001A";// +"\r";//+ "240D";
                command = ConvertMessage(Message) + char.ConvertFromUtf32(26) + "\r";
                recievedData = ExecCommand(port, command, 10000, "Failed to send message"); //3 seconds
                if (recievedData.EndsWith("\r\nOK\r\n"))
                {
                    isSend = true;
                }
                else if (recievedData.Contains("ERROR"))
                {
                    isSend = false;
                }
                return isSend;
            }
            catch (Exception ex)
            {
                throw ex;
            }

        } 

        //Execute AT Command
        public string ExecCommand(SerialPort port, string command, int responseTimeout, string errorMessage)
        {
            try
            {

                port.DiscardOutBuffer();
                port.DiscardInBuffer();
                receiveNow.Reset();
                port.Write(command + "\r");

                string input = ReadResponse(port, responseTimeout);
                if ((input.Length == 0) || ((!input.EndsWith("\r\n> ")) && (!input.EndsWith("\r\nOK\r\n"))))
                    throw new ApplicationException("No success message was received.");
                return input;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public string ReadResponse(SerialPort port, int timeout)
        {
            string buffer = string.Empty;
            try
            {
                do
                {
                    if (receiveNow.WaitOne(timeout, false))
                    {
                        string t = port.ReadExisting();
                        buffer += t;
                    }
                    else
                    {
                        if (buffer.Length > 0)
                            throw new ApplicationException("Response received is incomplete.");
                        else
                            throw new ApplicationException("No data received from phone.");
                    }
                }
                while (!buffer.EndsWith("\r\nOK\r\n") && !buffer.EndsWith("\r\n> ") && !buffer.EndsWith("\r\nERROR\r\n"));
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return buffer;
        }

        public void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            try
            {
                if (e.EventType == SerialData.Chars)
                {
                    receiveNow.Set();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }
}

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