So Basically I'm working on this Desktop application using c# server and client and for some reason whenever I send a msg in chat it doesn't work for all users but when I send a private msg it's working and I'm not sure why.
my server code:
if (e.MessageString.Contains("#"))
{
if (e.MessageString.Substring(0, 3).Equals("All"))
{
if (!e.MessageString.Substring(4, 4).Equals("File"))
{
string toAll = e.MessageString.Substring(4, e.MessageString.Length - 4) + "\n";
server.Broadcast(toAll);
txtStatus.Dispatcher.Invoke((Action)delegate ()
{
txtStatus.Text += toAll;
});
}
else
{
System.Windows.MessageBox.Show("Cannot send a file to everyone!");
}
}
and this is my chat code:
private void btnSend_Click(object sender, RoutedEventArgs e)
{
System.Console.WriteLine("Send was clicked");
if (btnConnect.IsEnabled)
{
System.Windows.MessageBox.Show("Please connect to the local server!");
}
else if (listbox.SelectedIndex != -1)
{
if (txtMessage.Text.Length > 0 && !ifFileSelected && !txtMessage.Text.Equals(" ") && !txtMessage.Text.Equals("\n"))
{
client.WriteLine(listbox.SelectedItem.ToString().ToLower() + "#" + username + ": " + txtMessage.Text);
}
else if (ifFileSelected)
{
byte[] b1 = File.ReadAllBytes(op.FileName);
client.Write(listbox.SelectedItem.ToString() + "#File#" + fi.Name + "#");
client.Write(b1);
ifFileSelected = false;
}
else
{
System.Windows.MessageBox.Show("Please type something or choose a file to send!");
}
}
else
{
System.Windows.MessageBox.Show("Please select someone to send the message to!");
}
txtMessage.Text = "";
}
I have followed instructions found on this site, which was found when I researched Stack Overflow and found this question. However, I can't seem to figure out why my code is hitting the catch block. I have a break at the IInstallationResult line, which the code hits but then goes to the catch, stating 0x80240024 (There are no updates), even though there are certainly updates available and I list them in the text box.
What am I missing here?
using System;
using System.Windows.Forms;
using WUApiLib;
namespace TEST.DetectWindowsUpdate
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void GetUpdates(bool downloadUpdates, bool installUpdates)
{
UpdateSession uSession = new UpdateSession();
IUpdateSearcher uSearcher = uSession.CreateUpdateSearcher();
UpdateCollection updatesToInstall = new UpdateCollection();
UpdateDownloader downloader = uSession.CreateUpdateDownloader();
IUpdateInstaller installer = uSession.CreateUpdateInstaller();
uSearcher.Online = true;
try
{
ISearchResult sResult = uSearcher.Search("IsInstalled=0 And Type='Software'");
lblUpdateCount.Text = sResult.Updates.Count.ToString();
foreach (IUpdate update in sResult.Updates)
{
txtUpdatesList.AppendText("Title: " + update.Title + Environment.NewLine);
txtUpdatesList.AppendText("IsInstalled: " + update.IsInstalled.ToString() + Environment.NewLine);
txtUpdatesList.AppendText("Downloaded: " + update.IsDownloaded.ToString() + Environment.NewLine);
txtUpdatesList.AppendText("IsMandatory: " + update.IsMandatory.ToString() + Environment.NewLine);
txtUpdatesList.AppendText(Environment.NewLine);
if (downloadUpdates)
{
if (update.IsDownloaded == false)
{
do
{
downloader.Updates.Add(update);
downloader.Download();
}
while (update.IsDownloaded == false);
if (update.IsDownloaded == true)
{
updatesToInstall.Add(update);
}
}
else
{
updatesToInstall.Add(update);
}
}
if (installUpdates)
{
installer.Updates = updatesToInstall;
IInstallationResult installationRes = installer.Install();
for (int i = 0; i < updatesToInstall.Count; i++)
{
txtUpdatesList.AppendText("Installing " + updatesToInstall[i].Title + "...");
if (installationRes.GetUpdateResult(i).HResult == 0)
{
txtUpdatesList.AppendText("INSTALL SUCCESS FOR " + updatesToInstall[i].Title);
}
else
{
txtUpdatesList.AppendText("INSTALL FAIL FOR " + updatesToInstall[i].Title);
}
}
}
}
}
catch (Exception ex)
{
Console.WriteLine("Error: " + ex.Message + ": " + ex.HelpLink);
}
}
private void btnGetUpdates_Click(object sender, EventArgs e)
{
base.OnLoad(e);
txtUpdatesList.Clear();
GetUpdates(false, false);
}
private void btnInstallUpdates_Click(object sender, EventArgs e)
{
base.OnLoad(e);
txtUpdatesList.Clear();
GetUpdates(true, true );
}
}
}
Turns out it was an issue with privileges. I ran as administrator and it functioned appropriately.
I am writing winForm app which have to listem SerialPort and print the data into multi line textbox in real time.
Here is the code:
using System;
using System.Drawing;
using System.Windows.Forms;
using System.IO.Ports;
using System.Threading;
using System.ComponentModel;
namespace SCPListener
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
GetAvailablePortNames();
panel1.BackColor = ColorTranslator.FromHtml("#f44147");
cbDefaultValue();
}
String[] PortNames;
bool conn = true;
String data;
public string datetime;
Form2 frm = new Form2();
void GetAvailablePortNames()
{
PortNames = SerialPort.GetPortNames();
comboBox1.Items.AddRange(PortNames);
}
void RefreshAvailablePortNames()
{
comboBox1.Items.Clear();
PortNames = SerialPort.GetPortNames();
comboBox1.Items.AddRange(PortNames);
}
public string getDataTime()
{
DateTime time = DateTime.Now;
string date = time.ToString(#"hh\:mm\:ss");
return date;
}
public void GetData()
{
string date = getDataTime();
data = serialPort1.ReadLine();
textBox1.AppendText("[" + date + "] " + "Received: " + data + "\r\n");
}
public void cbDefaultValue()
{
comboBox1.SelectedIndex = 0;
comboBox5.SelectedIndex = 0;
comboBox2.SelectedIndex = 0;
comboBox3.SelectedIndex = 0;
comboBox4.SelectedIndex = 0;
}
private void button1_Click(object sender, EventArgs e)
{
try
{
if (comboBox1.Text == "" || comboBox2.Text == "" || comboBox3.Text == "" || comboBox4.Text == "" || comboBox5.Text == "")
{
MessageBox.Show("Please port settings", "Incorrect port settings", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
DateTime time = DateTime.Now;
string date = time.ToString(#"hh\:mm\:ss");
serialPort1.PortName = comboBox1.Text;
serialPort1.BaudRate = Convert.ToInt32(comboBox2.Text);
switch (comboBox3.Text)
{
case "5":
serialPort1.DataBits = 5;
break;
case "6":
serialPort1.DataBits = 6;
break;
case "7":
serialPort1.DataBits = 7;
break;
case "8":
serialPort1.DataBits = 8;
break;
default:
serialPort1.DataBits = 5;
break;
}
switch (comboBox4.Text)
{
case "None":
serialPort1.Parity = Parity.None;
break;
case "Odd":
serialPort1.Parity = Parity.Odd;
break;
case "Even":
serialPort1.Parity = Parity.Even;
break;
case "Mark":
serialPort1.Parity = Parity.Mark;
break;
case "Space":
serialPort1.Parity = Parity.Space;
break;
}
switch (comboBox5.Text)
{
case "One":
serialPort1.StopBits = StopBits.One;
break;
case "Two":
serialPort1.StopBits = StopBits.Two;
break;
case "OnePointFive":
serialPort1.StopBits = StopBits.OnePointFive;
break;
}
serialPort1.Open();
string CurrentPornName = comboBox1.Text;
label7.Text = "Opened " + CurrentPornName;
panel1.BackColor = ColorTranslator.FromHtml("#42f477");
comboBox1.Enabled = false;
comboBox2.Enabled = false;
comboBox3.Enabled = false;
comboBox4.Enabled = false;
comboBox5.Enabled = false;
//button5.Enabled = false;
//button6.Enabled = false;
}
}
catch (Exception ex)
{
if (ex is UnauthorizedAccessException)
{
MessageBox.Show("Unauthorized Acces","Access Error",MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else if (ex is System.IO.IOException)
{
MessageBox.Show("Please plug in your device", "IO Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
private void button2_Click(object sender, EventArgs e)
{
panel1.BackColor = ColorTranslator.FromHtml("#f44147");
string CurrentPornName = comboBox1.Text;
label7.Text = "Closed " + CurrentPornName; ;
serialPort1.Close();
comboBox1.Enabled = true;
comboBox2.Enabled = true;
comboBox3.Enabled = true;
comboBox4.Enabled = true;
comboBox5.Enabled = true;
//button5.Enabled = true;
//button6.Enabled = true;
}
private void button5_Click(object sender, EventArgs e)
{
RefreshAvailablePortNames();
}
private void button3_Click(object sender, EventArgs e)
{
//backgroundWorker1.RunWorkerAsync();
Thread thread = new Thread(start: ()=>
{
try
{
datetime = getDataTime();
string date = getDataTime();
startListening:
if (serialPort1.BytesToRead > 0)
{
datetime = getDataTime();
data = serialPort1.ReadLine();
textBox2.AppendText("[" + datetime + "] " + "Received: " + data + "\r\n");
}
else
textBox2.AppendText("[" + datetime + "] " + "Error: There is no data to read" + "\r\n");
if (conn)
goto startListening;
}
catch (Exception ex)
{
DateTime time = DateTime.Now;
string date = time.ToString(#"hh\:mm\:ss");
if (ex is TimeoutException)
{
textBox1.AppendText("[" + date + "] " + "Timuot Exception" + "\r\n");
}
else if (ex is InvalidOperationException)
{
MessageBox.Show("Plese check settings", "Error: Invalid Operation", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else if (ex is System.IO.IOException)
{
MessageBox.Show("Port opened, but device unpluged..", "IO Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
});
thread.Start();
}
private void button4_Click(object sender, EventArgs e)
{
conn = false;
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
try
{
datetime = getDataTime();
string date = getDataTime();
startListening:
if (serialPort1.BytesToRead > 0)
{
datetime = getDataTime();
data = serialPort1.ReadLine();
textBox2.AppendText("[" + datetime + "] " + "Received: " + data + "\r\n");
}
else
textBox2.AppendText("[" + datetime + "] " + "Error: There is no data to read" + "\r\n");
if (conn)
goto startListening;
}
catch (Exception ex)
{
DateTime time = DateTime.Now;
string date = time.ToString(#"hh\:mm\:ss");
if (ex is TimeoutException)
{
textBox1.AppendText("[" + date + "] " + "Timuot Exception" + "\r\n");
}
else if (ex is InvalidOperationException)
{
MessageBox.Show("Plese check settings", "Error: Invalid Operation", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else if (ex is System.IO.IOException)
{
MessageBox.Show("Port opened, but device unpluged..", "IO Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
}
}
About Code:
comboBox1 -> where the Ports are listed
comboBox2 -> where the Baud Rates options are listed
comboBox3 -> where the Stop Bits options are listed
comboBox4 -> where the Data Bits options are listed
comboBox5 -> where the Parity options are listed
button1 -> to connect chosen port
button2 -> to disconnect port
button3 -> to start listening and print data into textBox in real time
button4 -> to stop listening
button5 -> refresh available ports
panel1-> to identify port is connected or not (if connected it is green if it is not connected it is red)
So, what i want to do is that when I click the stop button (button4), program have to stop listening. I am trying to achieve this result using backgroundWorker .
Using this code when i try to listen port (clicking start button button3 there is opening the small error window and tell please check settings (so it catching InvalidOperationException according to my code); If I wont use backgoundWorker and also remove try{...} cath{...} program start do display the received data from port but blocking the UI. Any ideas will be very helpful.
button4_click needs to call backgroundWorker1.CancelAsync() instead of setting a bool. With BackgroundWorkers, you need to specify that you want them to end and then check for it, setting and checking an outside bool will not work. The try block in your backgroundWorker1_DoWork() method should look like the following. Keep in mind, it is easier for you and others to help you if you rename your variables (either done in the UI or by right clicking the variable and selecting 'Rename'). Another note before the code, it is almost never ok to use 'goto', there is almost always a better option (a while loop in this case).
datetime = getDataTime();
string date = getDataTime();
while (!backgroundWorker1.CancellationPending)
{
if (serialPort1.BytesToRead > 0)
{
datetime = getDataTime();
data = serialPort1.ReadLine();
textBox2.AppendText($"[{datetime}] Received: {data}\r\n");
}
else
{
textBox2.AppendText($"[{datetime}] Error: There is no data to read\r\n");
}
}
Edit to say: This should get you started, you will also want to check out this link to access your UI from backgroundWorker1, the problem is your UI is on one thread and your BackgroundWorker on another, threads do not work well together without some complimenting code
I want to create a service for Wifi Direct. If I try to add Reference, I don't see core->windows option in VS2013. I have updated the winSDK.
How do I add the Windows.Devices.WifiDirect api ?
you can use
public sealed class WiFiDirectDevice : IDisposable
this is a sample code to handle connections
Windows.Devices.WiFiDirect.WiFiDirectDevice wfdDevice;
private async System.Threading.Tasks.Task<String> Connect(string deviceId)
{
string result = "";
try
{
// No device Id specified.
if (String.IsNullOrEmpty(deviceId)) { return "Please specify a Wi- Fi Direct device Id."; }
// Connect to the selected Wi-Fi Direct device.
wfdDevice = await Windows.Devices.WiFiDirect.WiFiDirectDevice.FromIdAsync(deviceId);
if (wfdDevice == null)
{
result = "Connection to " + deviceId + " failed.";
}
// Register for connection status change notification.
wfdDevice.ConnectionStatusChanged += new TypedEventHandler<Windows.Devices.WiFiDirect.WiFiDirectDevice, object>(OnConnectionChanged);
// Get the EndpointPair information.
var EndpointPairCollection = wfdDevice.GetConnectionEndpointPairs();
if (EndpointPairCollection.Count > 0)
{
var endpointPair = EndpointPairCollection[0];
result = "Local IP address " + endpointPair.LocalHostName.ToString() +
" connected to remote IP address " + endpointPair.RemoteHostName.ToString();
}
else
{
result = "Connection to " + deviceId + " failed.";
}
}
catch (Exception err)
{
// Handle error.
result = "Error occurred: " + err.Message;
}
return result;
}
private void OnConnectionChanged(object sender, object arg)
{
Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus status =
(Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus)arg;
if (status == Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus.Connected)
{
// Connection successful.
}
else
{
// Disconnected.
Disconnect();
}
}
private void Disconnect()
{
if (wfdDevice != null)
{
wfdDevice.Dispose();
}
}
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.