can some one take a look to my C# source that has a crash issue? The program is supposed to omit unwanted double clicks the mouse sometimes sends and it works but after a while using the program it crashes.
The line that crashes:
Application.Run(new TheContext());
This is the error code:
An unhandled exception of type 'System.NullReferenceException' occurred in Gma.System.MouseKeyHook.dll
I'm using Visual studio community 2017
Source:
program.cs:
https://pastebin.com/AX9VRi00
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
namespace MouseFixer
{
static class Program
{
static Mutex pmu;
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
// Console.WriteLine("Hello");
try
{
Mutex.OpenExisting("MouseFixer");
MessageBox.Show("MouseFixer is already running", "", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return;
}
catch
{
pmu = new Mutex(true, "MouseFixer");
}
Application.Run(new TheContext());
}
}
}
thecontext.cs:
https://pastebin.com/G1cNzj4d
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Gma.System.MouseKeyHook;
using System.Diagnostics;
namespace MouseFixer
{
public class TheContext : ApplicationContext
{
// https://stackoverflow.com/questions/30061813/intercept-mouse-click
StringBuilder logText;
long lastClickTime;
long lastMouseUp;
bool ignoreClick = false;
void writeLog(string msg)
{
logText.Append(msg + Environment.NewLine);
File.AppendAllText("log.txt", logText.ToString());
logText.Clear();
}
bool errorShown = false;
void errorMsg(string str)
{
if(!errorShown)
MessageBox.Show(str);
errorShown = true;
}
long getTime()
{
return DateTimeOffset.Now.ToUnixTimeMilliseconds();
}
public TheContext()
{
Application.ApplicationExit += new EventHandler(this.OnExit);
logText = new StringBuilder();
lastClickTime = getTime();
lastMouseUp = getTime();
Hook.GlobalEvents().MouseDownExt += async (sender, e) =>
{
if (e.Button == MouseButtons.Left)
{
// e.Handled = true;
// writeLog("Handling click DOWN! " + e.Delta);
long lmu = (getTime() - lastMouseUp);
if (lmu < 10)
{
Debug.WriteLine("Too fast click - ignoring " + (getTime() - lastMouseUp) + Environment.NewLine);
e.Handled = true;
ignoreClick = true;
}
long lct = getTime() - lastClickTime;
lastClickTime = getTime();
Debug.WriteLine("MouseDOWN " + lct + " ( " + lmu + " ) " + Environment.NewLine);
}
};
Hook.GlobalEvents().MouseUpExt += async (sender, e) =>
{
if (e.Button == MouseButtons.Left)
{
if (!ignoreClick)
{
// e.Handled = true;
// writeLog("Handling click UP! " + e.Delta);
long lct = getTime() - lastClickTime;
lastClickTime = getTime();
Debug.WriteLine("MouseUP " + lct + Environment.NewLine);
lastMouseUp = getTime();
}
else
{
Debug.WriteLine("Ignoring click " + Environment.NewLine);
e.Handled = true;
ignoreClick = false;
}
}
};
}
private void OnExit(object sender, EventArgs e)
{
// File.AppendAllText("log.txt", logText.ToString());
}
}
}
I have managed to connect to the RFID USB reader using the code below... However, whenever my tag is placed near the reader. It does not run the function and produce an output of "Reading Data...". Anyone can provide me a functioning RFID coding? Below is my codes written.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO.Ports;
using System.Threading;
using System.Windows.Forms;
using Gtk;
namespace Testing1
{
public class Testing1
{
public static SerialPort iSerialPort = new SerialPort();
static int Main()
{
string strException = string.Empty;
string strComPort = "COM17";
int nBaudrate=Convert.ToInt32(9600);
int nRet = OpenCom(strComPort, nBaudrate, out strException);
if (nRet != 0)
{
string strLog = "Connect reader failed, due to: " + strException;
Console.WriteLine(strLog);
//return;
}
else
{
string strLog = "Reader connected " + strComPort + "#" + nBaudrate.ToString();
Console.WriteLine(strLog);
}
Console.WriteLine("Press any key to exit.");
Console.ReadKey();
iSerialPort.Close();
return 0;
}
public static int OpenCom(string strPort, int nBaudrate, out string strException)
{
strException = string.Empty;
if (iSerialPort.IsOpen)
{
iSerialPort.Close();
}
try
{
iSerialPort.PortName = strPort;
iSerialPort.BaudRate = nBaudrate;
iSerialPort.ReadTimeout = 3000;
iSerialPort.DataBits = 8;
//iSerialPort.Parity = Parity.None;
//iSerialPort.StopBits = StopBits.One;
//iSerialPort.Handshake = Handshake.None;
iSerialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
iSerialPort.Open();
}
catch (System.Exception ex)
{
strException = ex.Message;
return -1;
}
return 0;
}
private static void DataReceivedHandler(object sender,SerialDataReceivedEventArgs e)
{
SerialPort sp = (SerialPort)sender;
string indata = sp.ReadExisting();
Console.WriteLine("Data Received:");
Console.Write(indata);
}
}
}
I want to send SMS using way2sms. I have tried following code
login.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class Login : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnconnect_Click(object sender, EventArgs e)
{
Session["id"] = txtmobileno.Text;
Session["pw"] = txtpw.Text;
Response.Redirect("/send.aspx");
}
}
}
send.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
namespace WebApplication1
{
public partial class send : System.Web.UI.Page
{
string mbno, mseg, ckuser, ckpass;
private HttpWebRequest req;
private CookieContainer cookieCntr;
private string strNewValue;
public static string responseee;
private HttpWebResponse response;
protected void Page_Load(object sender, EventArgs e)
{
if (Session["id"] == null && Session["pw"] == null)
{
Server.Transfer("login.aspx");
}
connect();
try
{
lblError.Text = "";
lblError.Visible = false;
if (!(IsPostBack))
{
btnSend.Attributes.Add("onclick", "return Validate('" + txtTo.ClientID + "','" + txtMessage.ClientID + "');");
txtMessage.Attributes.Add("onchange", "TextChange('" + txtMessage.ClientID + "','" + lblLeft.ClientID + "');");
txtMessage.Attributes.Add("onkeyup", "TextChange('" + txtMessage.ClientID + "','" + lblLeft.ClientID + "');");
}
}
catch (Exception ex)
{
lblError.Text = ex.Message;
lblError.Visible = true;
}
}
protected void btnSend_Click(object sender, EventArgs e)
{
try
{
mbno = txtTo.Text;
mseg = txtMessage.Text;
sendSms(mbno, mseg);
txtTo.Text = "";
txtMessage.Text = "";
}
catch (Exception ex)
{
lblError.Text = ex.Message;
lblError.Visible = true;
}
}
public void connect()
{
ckuser = Session["id"].ToString();
ckpass = Session["pw"].ToString();
try
{
this.req = (HttpWebRequest)WebRequest.Create("http://wwwd.way2sms.com/auth.cl");
this.req.CookieContainer = new CookieContainer();
this.req.AllowAutoRedirect = false;
this.req.Method = "POST";
this.req.ContentType = "application/x-www-form-urlencoded";
this.strNewValue = "username=" + ckuser + "&password=" + ckpass;
this.req.ContentLength = this.strNewValue.Length;
StreamWriter writer = new StreamWriter(this.req.GetRequestStream(), Encoding.ASCII);
writer.Write(this.strNewValue);
writer.Close();
this.response = (HttpWebResponse)this.req.GetResponse();
this.cookieCntr = this.req.CookieContainer;
this.response.Close();
this.req = (HttpWebRequest)WebRequest.Create("http://wwwd.way2sms.com//jsp/InstantSMS.jsp?val=0");
this.req.CookieContainer = this.cookieCntr;
this.req.Method = "GET";
this.response = (HttpWebResponse)this.req.GetResponse();
responseee = new StreamReader(this.response.GetResponseStream()).ReadToEnd();
int index = Regex.Match(responseee, "custf").Index;
responseee = responseee.Substring(index, 0x12);
responseee = responseee.Replace("\"", "").Replace(">", "").Trim();
this.response.Close();
pnlsend.Visible = true;
lblErrormsg.Text = "connected";
}
catch (Exception ex)
{
lblErrormsg.Text = "Error connecting to the server...";
Session["error"] = "Error connecting to the server...";
lblError.Text = ex.ToString();
lblError.Text= ex.ToString();
//Server.Transfer("login.aspx");
}
}
public void sendSms(string mbno, string mseg)
{
if ((mbno != "") && (mseg != ""))
{
try
{
this.req = (HttpWebRequest)WebRequest.Create("http://wwwd.way2sms.com//FirstServletsms?custid=");
this.req.AllowAutoRedirect = false;
this.req.CookieContainer = this.cookieCntr;
this.req.Method = "POST";
this.req.ContentType = "application/x-www-form-urlencoded";
this.strNewValue = "custid=undefined&HiddenAction=instantsms&Action=" + responseee + "&login=&pass=&MobNo=" + this.mbno + "&textArea=" + this.mseg;
string msg = this.mseg;
string mbeno = this.mbno;
this.req.ContentLength = this.strNewValue.Length;
StreamWriter writer = new StreamWriter(this.req.GetRequestStream(), Encoding.ASCII);
writer.Write(this.strNewValue);
writer.Close();
this.response = (HttpWebResponse)this.req.GetResponse();
this.response.Close();
lblErrormsg.Text = "Message Sent..... " + mbeno + ": " + msg;
}
catch (Exception)
{
lblErrormsg.Text = "Error Sending msg....check your connection...";
}
}
else
{
lblErrormsg.Text = "Mob no or msg missing";
}
}
protected void btnLogOut_Click(object sender, EventArgs e)
{
Session["id"] = null;
Session["pw"] = null;
Session["error"] = null;
Server.Transfer("login.aspx");
}
}
}
But it doesn't work. Is there any changes in this code that I have to do?
Please tell me any other way to send sms from desktop application or web application
I dont know way2sms but the easiest SMS API I have found is http://cp.bulksmsportal.co.za/sms_default.aspx
Code is really simple as well
public static void sendSMS(string Recepient, string Message)
{
//Recepient is the cellno in string format
StringBuilder sb = new StringBuilder();
sb.Append("http://www.mymobileapi.com/api5/http5.aspx?");
sb.Append("Type=sendparam");
sb.Append("&username={yourusername}");//add your username here
sb.Append("&password={yourpassword}");//add your password here
sb.AppendFormat("&numto={0}", Recepient);
string message = HttpUtility.UrlEncode(Message, ASCIIEncoding.ASCII);
sb.AppendFormat("&data1={0}", message);
try
{
////Create the request and send data to the SMS Gateway Server by HTTP connection
HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(sb.ToString());
//Get response from the SMS Gateway Server and read the answer
HttpWebResponse myResp = (HttpWebResponse)myReq.GetResponse();
System.IO.StreamReader respStreamReader = new System.IO.StreamReader(myResp.GetResponseStream());
string responseString = respStreamReader.ReadToEnd();
respStreamReader.Close();
myResp.Close();
}
catch (Exception ex)
{
}
}
I used this : GSM Communication Library (GSMComm)
Situation:
1. Linux TCP server
2 Windows C# client application
The server receives messages from client, but when I try to send messages from server to the client nothing happens. When I disconnect I get the error:
"Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall." and it points to the line ---> string Response = swRead.ReadLine();
Here is the Client code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;
namespace AsynClient
{
public partial class Form1 : Form
{
private TcpClient client;
private StreamWriter swSend;
private StreamReader swRead;
private bool connected = false;
string bojaTekst = "", bojaPoz = "";
private delegate void UpdateLogCallback(string strMessage);
private Thread thrMessag;
public Form1()
{
Application.ApplicationExit += new EventHandler(OnApplicationExit);
InitializeComponent();
}
private void btnConnect_Click(object sender, EventArgs e)
{
if (connected == false)
{
InitializeConnection();
}
else
MessageBox.Show("Vec je uspostavljenja konekcija.");
}
private void InitializeConnection()
{
client = new TcpClient();
client.Connect("192.168.100.82", 3456);
swSend = new StreamWriter(client.GetStream()); //prvo mora da se konektuje, pa onda ova komanda
thrMessag = new Thread(new ThreadStart(ReceiveMessages));
thrMessag.Start();
connected = true;
btnSend.Enabled = true;
btnDisconnect.Enabled = true;
txtMsg.Enabled = true;
btnConnect.Enabled = false;
}
private void UpdateLog(string strMessage)
{
txtServ.AppendText(strMessage + "\r\n");
}
private void ReceiveMessages()
{
swRead = new StreamReader(client.GetStream());
string Response = swRead.ReadLine();
while (connected)
{
// Show the messages in the log TextBox
this.Invoke(new UpdateLogCallback(this.UpdateLog), new object[] { swRead.ReadLine() });
}
}
private void btnSend_Click(object sender, EventArgs e)
{
if (listBoxTekst.SelectedIndex == -1)
listBoxTekst.SelectedIndex = 0;
if (listBoxPozadina.SelectedIndex == -1)
listBoxPozadina.SelectedIndex = 0;
bojaTekst = listBoxTekst.Text;
bojaPoz = listBoxPozadina.Text;
SendMessage();
}
private void SendMessage()
{
txtMsg.Text);
if (txtMsg.Lines.Length >= 1)
{
swSend.WriteLine(bojaPoz + "\t" + bojaTekst + "\t" + txtMsg.Text + "\t");
swSend.Flush();
txtMsg.Lines = null;
}
txtMsg.Text = "";
}
private void btnDisconnect_Click(object sender, EventArgs e)
{
char[] quit = new char[5];
quit[0] = 'q'; quit[1] = 'w'; quit[2] = 'w'; quit[3] = 'w'; quit[4] = '\0';
connected = false;
btnConnect.Enabled = true;
btnSend.Enabled = false;
btnDisconnect.Enabled = false;
txtMsg.Enabled = false;
swSend.WriteLine(quit);
swSend.Flush();
swSend.Close();
client.Close();
}
public void OnApplicationExit(object sender, EventArgs e)
{
if (connected == true)
{
connected = false;
swSend.WriteLine("qwww"); //proveri da li radi f-ja kako treba
swSend.Flush();
swSend.Close();
client.Close();
}
}
}
}
The server side receives the messages with the read() function and it works fine, but when it sends with write() the C# client doesn't receive the message.
Just one thing (there mioght be other problems):
You have a connected variable, which value you set to true, after you start your listening thread. The loop within the thread doesnt even run once.
thrMessag = new Thread(new ThreadStart(ReceiveMessages));
thrMessag.Start();
connected = true; //here is your first bug, should come before the previos line
I wrote code to send an SMS using my GSM phone which is attached to the computer through COM port. The code is below.
The problem is I do see that it is in the outbox of the phone and it actually appears to have been sent, but when I contact the recipient they say that I have not received the message.
I test the phone, and I create and send a message using only the phone and it works perfectly. However, when I do this with my code, it APPEARS to have been sent, and I am getting all the correct AT COMMAND responses from the phone, but the message is actually NOT sent.
Here is the code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.IO.Ports;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
SerialPort serialPort1;
int m_iTxtMsgState = 0;
const int NUM_MESSAGE_STATES = 4;
const string RESERVED_COM_1 = "COM1";
const string RESERVED_COM_4 = "COM4";
public Form1()
{
InitializeComponent();
this.Closing += new CancelEventHandler(Form1_Closing);
}
private void Form1_Load(object sender, EventArgs e)
{
serialPort1 = new SerialPort(GetUSBComPort());
if (serialPort1.IsOpen)
{
serialPort1.Close();
}
serialPort1.Open();
//ThreadStart myThreadDelegate = new ThreadStart(ReceiveAndOutput);
//Thread myThread = new Thread(myThreadDelegate);
//myThread.Start();
this.serialPort1.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);
}
private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
serialPort1.Close();
}
private void SendLine(string sLine)
{
serialPort1.Write(sLine);
sLine = sLine.Replace("\u001A", "");
consoleOut.Text += sLine;
}
public void DoWork()
{
ProcessMessageState();
}
public void ProcessMessageState()
{
switch (m_iTxtMsgState)
{
case 0:
m_iTxtMsgState = 1;
SendLine("AT\r\n"); //NOTE: SendLine must be the last thing called in all of these!
break;
case 1:
m_iTxtMsgState = 2;
SendLine("AT+CMGF=1\r\n");
break;
case 2:
m_iTxtMsgState = 3;
SendLine("AT+CMGW=" + Convert.ToChar(34) + "+9737387467" + Convert.ToChar(34) + "\r\n");
break;
case 3:
m_iTxtMsgState = 4;
SendLine("A simple demo of SMS text messaging." + Convert.ToChar(26));
break;
case 4:
m_iTxtMsgState = 5;
break;
case 5:
m_iTxtMsgState = NUM_MESSAGE_STATES;
break;
}
}
private string GetStoredSMSID()
{
return null;
}
/* //I don't think this part does anything
private void serialPort1_DataReceived_1(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
string response = serialPort1.ReadLine();
this.BeginInvoke(new MethodInvoker(() => textBox1.AppendText(response + "\r\n")));
}
*/
void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
try
{
Thread.Sleep(500);
char[] msg;
msg = new char[613];
int iNumToRead = serialPort1.BytesToRead;
serialPort1.Read(msg, 0, iNumToRead);
string response = new string(msg);
this.BeginInvoke(new MethodInvoker(() => textBox1.AppendText(response + "\r\n")));
serialPort1.DiscardInBuffer();
if (m_iTxtMsgState == 4)
{
int pos_cmgw = response.IndexOf("+CMGW:");
string cmgw_num = response.Substring(pos_cmgw + 7, 4);
SendLine("AT+CMSS=" + cmgw_num + "\r\n");
//stop listening to messages received
}
if (m_iTxtMsgState < NUM_MESSAGE_STATES)
{
ProcessMessageState();
}
}
catch
{ }
}
private void button1_Click(object sender, EventArgs e)
{
m_iTxtMsgState = 0;
DoWork();
}
private void button2_Click(object sender, EventArgs e)
{
string[] sPorts = SerialPort.GetPortNames();
foreach (string port in sPorts)
{
consoleOut.Text += port + "\r\n";
}
}
private string GetUSBComPort()
{
string[] sPorts = SerialPort.GetPortNames();
foreach (string port in sPorts)
{
if (port != RESERVED_COM_1
&& port != RESERVED_COM_4)
{
return port;
}
}
return null;
}
}
This is my code that works (tested) with U9 Telia cellular modem:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Configuration;
using UsbEject.Library;
using Utils;
namespace Hardware
{
public class TeliaModem : IDisposable
{
public delegate void NewSmsHandler(InboundSMS sms);
public event NewSmsHandler OnNewSMS;
#region private data
System.IO.Ports.SerialPort modemPort;
Timeouter _lastModemKeepAlive;
private delegate void DataReceivedDelegate();
private DataReceivedDelegate dataReceivedDelegate;
Queue<OutboundSMS> _outSmses = new Queue<OutboundSMS>();
enum ModemState
{
Error = -1, NotInitialized, PowerUp, Initializing, Idle,
SendingSMS, KeepAliveAwaitingResponse
};
Timeouter ModemStateTimeouter = new Timeouter(timeout_s: 10, autoReset: false);
ModemState _modemState = ModemState.NotInitialized;
ModemState CurrentModemState
{
get
{
return _modemState;
}
set
{
_modemState = value;
ModemStateTimeouter.Reset();
NihLog.Write(NihLog.Level.Debug, "State changed to: " + value.ToString());
}
}
private System.Windows.Forms.Control _mainThreadOwnder;
#endregion
public TeliaModem(System.Windows.Forms.Control mainThreadOwnder)
{
_mainThreadOwnder = mainThreadOwnder;
dataReceivedDelegate = new DataReceivedDelegate(OnDataReceived);
}
public void SendSMS(string phone, string text)
{
_outSmses.Enqueue(new OutboundSMS(phone, text));
HeartBeat();
}
private void SendSmsNow()
{
OutboundSMS sms = _outSmses.Peek();
sms.Attempt++;
if (sms.Attempt > sms.MaxTries)
{
NihLog.Write(NihLog.Level.Error, "Failure to send after " + sms.MaxTries + " tries");
_outSmses.Dequeue();
return;
}
NihLog.Write(NihLog.Level.Info, "Sending SMS: " + sms.ToString());
WriteToModem("AT+CMGS=\"" + sms.Destination + "\"\r");
System.Threading.Thread.Sleep(500);
WriteToModem(sms.Text);
byte[] buffer = new byte[1];
buffer[0] = 26; // ^Z
modemPort.Write(buffer, offset:0, count:1);
CurrentModemState = ModemState.SendingSMS;
}
public void Dispose()
{
UninitModem();
}
public void HeartBeat()
{
if (CurrentModemState == ModemState.NotInitialized)
{
TryInitModem();
return;
}
if (IsTransitionalState(CurrentModemState) && ModemStateTimeouter.IsTimedOut())
{
NihLog.Write(NihLog.Level.Error, "Modem error. Timed out during " + CurrentModemState);
CurrentModemState = ModemState.Error;
return;
}
if (CurrentModemState == ModemState.Idle && _lastModemKeepAlive.IsTimedOut())
{
// Send keepalive
WriteToModem("AT\r");
CurrentModemState = ModemState.KeepAliveAwaitingResponse;
return;
}
if (CurrentModemState == ModemState.Error)
{
NihLog.Write(NihLog.Level.Debug, "Reenumerating modem...");
UninitModem();
return;
}
if (_outSmses.Count != 0 && CurrentModemState == ModemState.Idle)
{
SendSmsNow();
return;
}
}
private string pendingData;
private void OnDataReceived()
{
// Called in the main thread
string nowWhat = modemPort.ReadExisting();
pendingData += nowWhat;
string[] lines = pendingData.Split(new string[] { "\r\n" }, StringSplitOptions.None);
if (lines.Length == 0)
{
pendingData = string.Empty;
return;
}
else
{
pendingData = lines[lines.Length - 1];
}
// This happens in main thread.
for (int i = 0; i < lines.Length - 1; i++)
{
string line = lines[i];
if (line.Length >= 5 && line.Substring(0, 5) == "+CMT:")
{
// s+= read one more line
if (i == lines.Length - 1) // no next line
{
pendingData = line + "\r\n" + pendingData; // unread the line
continue;
}
string line2 = lines[++i];
NihLog.Write(NihLog.Level.Debug, "RX " + line);
NihLog.Write(NihLog.Level.Debug, "RX " + line2);
InboundSMS sms = new InboundSMS();
sms.ParseCMT(line, line2);
if(OnNewSMS != null)
OnNewSMS(sms);
}
else // Not a composite
NihLog.Write(NihLog.Level.Debug, "RX " + line);
if (line == "OK")
{
OnModemResponse(true);
}
else if (line == "ERROR")
{
OnModemResponse(false);
NihLog.Write(NihLog.Level.Error, "Modem error");
}
}
}
private void ProcessSmsResult(bool ok)
{
if (!ok)
{
OutboundSMS sms = _outSmses.Peek();
if (sms.Attempt < sms.MaxTries)
{
NihLog.Write(NihLog.Level.Info, "Retrying sms...");
return;
}
NihLog.Write(NihLog.Level.Error, "Failed to send SMS: " + sms.ToString());
}
_outSmses.Dequeue();
}
private void OnModemResponse(bool ok)
{
if (CurrentModemState == ModemState.SendingSMS)
ProcessSmsResult(ok);
if (!ok)
{
NihLog.Write(NihLog.Level.Error, "Error during state " + CurrentModemState.ToString());
CurrentModemState = ModemState.Error;
return;
}
switch (CurrentModemState)
{
case ModemState.NotInitialized:
return;
case ModemState.PowerUp:
WriteToModem("ATE0;+CMGF=1;+CSCS=\"IRA\";+CNMI=1,2\r");
CurrentModemState = ModemState.Initializing;
break;
case ModemState.Initializing:
case ModemState.SendingSMS:
case ModemState.KeepAliveAwaitingResponse:
CurrentModemState = ModemState.Idle;
break;
}
}
private void CloseU9TelitNativeApp()
{
bool doneSomething;
do
{
doneSomething = false;
Process[] processes = Process.GetProcessesByName("wirelesscard");
foreach (Process p in processes)
{
p.CloseMainWindow();
doneSomething = true;
NihLog.Write(NihLog.Level.Info, "Killed native U9 app");
System.Threading.Thread.Sleep(1000); // Will not wait if no native app is started
}
} while (doneSomething);
}
void WriteToModem(string s)
{
modemPort.Write(s);
NihLog.Write(NihLog.Level.Debug, "TX " + s);
}
void UninitModem()
{
if (modemPort != null)
modemPort.Dispose();
modemPort = null;
CurrentModemState = ModemState.NotInitialized;
}
private bool IsTransitionalState(ModemState ms)
{
return ms == ModemState.Initializing
|| ms == ModemState.SendingSMS
|| ms == ModemState.PowerUp
|| ms == ModemState.KeepAliveAwaitingResponse;
}
Timeouter _initFailureTimeout =
new Timeouter(timeout_s: 10, autoReset:false, timedOut:true);
void TryInitModem()
{
// Try pistoning the modem with higher frequency. This does no harm (such as redundant logging)
PrepareU9Modem(); // Will do nothing if modem is okay
if (!_initFailureTimeout.IsTimedOut())
return; // Don't try too frequently
if (modemPort != null)
return;
const string modemPortName = "Basecom HS-USB NMEA 9000";
const int speed = 115200;
string portName = Hardware.Misc.SerialPortFromFriendlyName(modemPortName);
if (portName == null)
{
NihLog.Write(NihLog.Level.Error, "Modem not found (yet). ");
_initFailureTimeout.Reset();
return;
}
NihLog.Write(NihLog.Level.Info, string.Format("Found modem port \"{0}\" at {1}", modemPortName, portName));
modemPort = new System.IO.Ports.SerialPort(portName, speed);
modemPort.ReadTimeout = 3000;
modemPort.NewLine = "\r\n";
modemPort.Open();
modemPort.DiscardInBuffer();
modemPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(delegate { _mainThreadOwnder.Invoke(dataReceivedDelegate); }); // called in different thread!
_lastModemKeepAlive = new Timeouter(60, true);
WriteToModem("AT+CFUN=1\r");
CurrentModemState = ModemState.PowerUp;
}
void CheatU9Telit()
{
// U9 telit appears as USB CDrom on the bus, until disk eject is sent.
// Then, it reappears as normal stuff.
VolumeDeviceClass volumeDeviceClass = new VolumeDeviceClass();
foreach (Volume device in volumeDeviceClass.Devices)
{
if (device.FriendlyName == "PCL HSUPA Modem USB Device")
{
NihLog.Write(NihLog.Level.Info, "Trying to initialize: " + device.FriendlyName);
device.EjectCDRomNoUI();
}
}
}
void PrepareU9Modem()
{
CloseU9TelitNativeApp(); // Closes the autorun native app
CheatU9Telit();
}
}
public class OutboundSMS
{
public string Destination;
public string Text;
public int MaxTries;
public int Attempt = 0;
public OutboundSMS(string dest, string txt)
{
Destination = dest;
Text = txt;
MaxTries = 3;
}
override public string ToString()
{
if(Attempt > 1)
return string.Format("\"{0}\" to {1}, attempt {2}",
Text, Destination, Attempt);
else
return string.Format("\"{0}\" to {1}",
Text, Destination);
}
}
public class InboundSMS
{
public string SourcePhone;
public DateTime ReceiveTime;
public string Text;
public void ParseCMT(string line1, string line2)
{
string[] fields = line1.Split(new char[] { ',', ' ', '/', ':', '"' });
if (fields.Length < 12)
throw new ApplicationException("CMT message too short. Expected 2 fields");
SourcePhone = fields[3];
ReceiveTime = DateTime.Parse("20" + fields[7] + "-" + fields[8] + "-" + fields[9] + " " + fields[10] + ":" + fields[11] + ":" + fields[12].Substring(0, 2)); //test carefully
Text = line2;
}
};
}
Usage example in a winforms application:
Hardware.TeliaModem _modem;
public Form1()
{
InitializeComponent();
_modem = new Hardware.TeliaModem(this);
_modem.OnNewSMS += new Hardware.TeliaModem.NewSmsHandler(ProcessNewSMS);
_timer.Interval = 1000; // milliseconds
_timer.Tick += new EventHandler(OnTimerTick);
_timer.Start();
}
To send an SMS:
_modem.SendSMS(sms.SourcePhone, "Aircon is now " + BoolToString.ON_OFF(_aircon.On));
On timer event, once every second:
private void OnTimerTick(object o, EventArgs e)
{
_modem.HeartBeat();
}
This is registered as Winforms timer handler, so that modem will not have a thread.
Some utility classes used:
namespace Utils
{
public class StopWatch
{
protected DateTime _resetTime;
public StopWatch() { Reset(); }
public void Reset() { _resetTime = DateTime.Now; }
public double TotalSeconds { get { return (DateTime.Now - _resetTime).TotalSeconds; } }
public TimeSpan Time { get { return DateTime.Now - _resetTime; } }
};
public class Timeouter : StopWatch
{
private bool _autoReset;
private double _timeout_s;
public Timeouter(double timeout_s, bool autoReset, bool timedOut = false)
{
_timeout_s = timeout_s;
_autoReset = autoReset;
if (timedOut)
_resetTime -= TimeSpan.FromSeconds(_timeout_s + 1); // This is surely timed out, as requested
}
public bool IsTimedOut()
{
if (_timeout_s == double.PositiveInfinity)
return false;
bool timedout = this.TotalSeconds >= _timeout_s;
if (timedout && _autoReset)
Reset();
return timedout;
}
public void Reset(double timeout_s) { _timeout_s = timeout_s; Reset(); }
public double TimeLeft { get { return _timeout_s - TotalSeconds; } }
}
}
I implemented this in order to turn on air conditioner with SMS (yeah, I live in a hot country). It works. Please feel free to use any of this code.
Enjoy.
Microsoft provides a pretty decent VB.Net example in a KB article "How to access serial and parallel ports by using Visual Basic .NET". I'm not sure what your phone returns, however, if you change the buffer loop in the example, you can at least print out the reply:
MSComm1.Output = "AT" & Chr(13)
Console.WriteLine("Send the attention command to the modem.")
Console.WriteLine("Wait for the data to come back to the serial port...")
' Make sure that the modem responds with "OK".
' Wait for the data to come back to the serial port.
Do
Buffer = Buffer & MSComm1.Input
Console.WriteLine("Found: {0}", Buffer)
Loop Until InStr(Buffer, "OK" & vbCrLf)
GSMComm is a C# library that will allow you to easily interact with a GSM mobile in text or PDU mode. (The site also has a bunch of testing utilities)
Working with GSM modem to send SMS has never been a good idea as such. Here's a checklist to make sure your SMS is sent out properly.
You are sending the SMS in text mode. Try sending it in PDU mode.
Try this library http://phonemanager.codeplex.com/
Do you change SMSC number before sending out the SMS, if so make sure the SMSC is correct.
Also make sure your SIM card has enough credits to let you send outbound SMS.
Check the network status especially when you're sending out SMS from your program. This might be a problem.
I recommend you checkout the Lite edition of NowSMS gateway that comes for free and lets you work with GSM modem very continently. NowSMS will give you api abstraction over a GSM modem connection, so you wil just need to call the Http Api of NowSMS gateway, rest will be taken care by the NowSMS gateway.
Above all this, if your end-users are going to remain internet connected while using your application or if your application is web-based and hosted over internet, I strongly recoomend to do away with GSM modem option and opt-in for reliable Http SMS gateway service providers.