/// <summary>
/// Send string message to IoT hub
/// </summary>
/// <param name="message">Message content</param>
/// <param name="userContextCallback">User data</param>
/// <returns>Zero if successful</returns>
public IOTHUB_CLIENT_RESULT SendEvent(string message, UIntPtr userContextCallback)
{
IOTHUB_CLIENT_RESULT ret;
IoTMessage iotMessage = new IoTMessage(message);
ret = SendEvent(iotMessage, userContextCallback);
iotMessage.Dispose();
return(ret);
}
/// <summary>
/// Clone the message
/// </summary>
/// <remarks>
/// The new instance will destory the message handle when disposed
/// </remarks>
/// <returns>New instance of IoTMessage for clone</returns>
public IoTMessage Clone()
{
IsDisposed();
UIntPtr clone = IoTHubMessage_Clone(MessageHandle);
if (clone == UIntPtr.Zero)
{
throw new InvalidOperationException("Failed to clone IoT message");
}
IoTMessage ret = new IoTMessage(clone);
// Since the new message handle is completely invisible to the client
// set this to owned so it is released when the instance is destroyed
ret.Owned = true;
return(new IoTMessage(clone));
}
/// <summary>
/// Send an IoT message to the IoT hub
/// </summary>
/// <param name="message">IoT message wrapper</param>
/// <param name="userContextCallback">User data</param>
/// <returns>Zero if successful</returns>
public IOTHUB_CLIENT_RESULT SendEvent(IoTMessage message, UIntPtr userContextCallback)
{
IsDisposed();
return((IOTHUB_CLIENT_RESULT)IoTHubClient_LL_SendEventAsync(_iotHandle, message.MessageHandle, _messageConfirmationCallback, userContextCallback));
}
/// <summary>
/// Send an IoT message to the IoT hub
/// </summary>
/// <param name="message">IoT message wrapper</param>
/// <returns>Zero if successful</returns>
public IOTHUB_CLIENT_RESULT SendEvent(IoTMessage message)
{
return(SendEvent(message, UIntPtr.Zero));
}
static void Main(string[] args)
{
IOTHUB_CLIENT_RESULT ret;
bool quit = false;
int counter = 0;
// Create my reported device twin
JObject twin = null;
//IoTConnection_LL.Protocols protocol = IoTConnection_LL.Protocols.AMQP;
IoTConnection_LL.Protocols protocol = IoTConnection_LL.Protocols.AMQP_WebSocket;
//IoTConnection_LL.Protocols protocol = IoTConnection_LL.Protocols.MQTT;
//IoTConnection_LL.Protocols protocol = IoTConnection_LL.Protocols.MQTT_WebSocket;
IoTConnection_LL conn = new IoTConnection_LL(CONNECTIONSTRING, protocol);
// Optional - turn on SDK detailed logging with true
ret = conn.SetLogging(false);
// Optional - route via a web proxy
//ret = conn.SetProxy("proxyname", 9999, null, null);
// For MQTT use URL encode and decode
if (protocol == IoTConnection_LL.Protocols.MQTT || protocol == IoTConnection_LL.Protocols.MQTT_WebSocket)
{
ret = conn.SetUrlEncodeDecode(true);
}
// Required for X.509 authentication
string certificate;
string privateKey;
// Certificates can be hardcoded as in this example
/*
* certificate = string.Join(Environment.NewLine,
* "-----BEGIN CERTIFICATE-----",
* "<<< SNIP >>>",
* "-----END CERTIFICATE-----");
*
* privateKey = string.Join(Environment.NewLine,
* "-----BEGIN RSA PRIVATE KEY-----",
* "<<< SNIP >>>",
* "-----END RSA PRIVATE KEY-----");
*/
// or certificates can be read from a file for flexibility
certificate = File.ReadAllText(@"C:\Users\markrad\OneDrive\Documents\AzureSamples\Certificates\MarkRadHub2_X509SSTest1_Certs\public1.cer");
privateKey = File.ReadAllText(@"C:\Users\markrad\OneDrive\Documents\AzureSamples\Certificates\MarkRadHub2_X509SSTest1_Certs\private1.key");
ret = conn.SetCertificateAndKey(certificate, privateKey);
// Callback for message confirmation
conn.ConfirmationCallback += (o, i) =>
{
Console.WriteLine("Message calback with " + i.ToString());
};
// Callback for cloud to device call
conn.MessageCallback += (o, i) =>
{
string message = i.ReceivedMessage.MessageType == IoTMessage.MessageTypes.String
? i.ReceivedMessage.Message
: i.ReceivedMessage.GetByteArrayAsString();
Console.WriteLine("Received {0}", message);
i.Success = true;
};
// Callback for direct method call
conn.DeviceMethodCallback += (o, i) =>
{
Console.WriteLine("Method = {0}", i.Method);
JObject input = JObject.Parse(Encoding.Default.GetString(i.Payload));
Console.WriteLine("Payload = \r\n{0}", input.ToString());
JObject response = new JObject(
new JProperty("success", "true"),
new JProperty("message", "Method complete"));
i.Response = response.ToString();
i.Result = 200;
};
conn.DeviceTwinCallback += (o, i) =>
{
// A little explanation here.
//
// The first time the device connects the hub will send the complete reported and desired JSON document. One can
// determine if it is a new connection if the JSON contains a "desired" element. In this instance one would
// compare desired to reported, make changes as necessary and report back a status.
//
// If the device twin is updated at the hub then an update will be sent. This will consist of the modified
// values. One would update the status and send a new report.
//
// Note that this code has been simplified to the bare minimum to demonstrate the logic flow.
//
// See https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins for further information.
JObject payload = JObject.Parse(i.Payload);
Console.WriteLine("Update state = {0}", i.UpdateState);
Console.WriteLine("Payload = \r\n{0}", payload.ToString());
try
{
bool updateRequired = false;
// The first call after connection will be a complete JSON document for desired and reported
if (payload.ContainsKey("desired"))
{
twin = payload;
if ((string)payload["desired"]["mark"] != (string)twin["reported"]["mark"])
{
twin["reported"]["mark"] = (string)payload["desired"]["mark"];
twin["reported"]["$version"] = (string)payload["desired"]["$version"];
updateRequired = true;
}
}
else
{
if ((string)payload["mark"] != (string)twin["reported"]["mark"])
{
twin["reported"]["mark"] = (string)payload["mark"];
updateRequired = true;
}
}
if (updateRequired)
{
JObject report = new JObject(
new JProperty("mark", twin["reported"]["mark"].ToString()));
Console.WriteLine("Reporting \r\n{0}", report.ToString());
conn.SendReportedTwinState(report.ToString());
}
}
catch (NullReferenceException e)
{
Console.WriteLine("Expected JSON element was not found or was wrong data type in twin request: " + e.Message);
}
};
conn.ReportedStateCallback += (o, i) =>
{
Console.WriteLine("Twin state callback = {0}", i.StatusCode);
};
conn.ClientConnectionStatusCallback += (o, i) =>
{
Console.WriteLine(i.ToString());
};
// Optional - use proxy for WebSockets
// ret = conn.SetProxy("<Proxy Address>", 8888);
Console.CancelKeyPress += (s, e) =>
{
Console.WriteLine("Exiting");
e.Cancel = true;
quit = true;
};
int messageNumber = 0;
bool flipflop = true;
while (!quit)
{
if (counter++ % 200 == 0)
{
flipflop ^= true;
IoTMessage message = new IoTMessage("Message at : " + counter.ToString());
message["Number"] = messageNumber++.ToString();
Debug.Assert(message["Number"] == (messageNumber - 1).ToString());
Debug.Assert(message["novalue"] == null);
message["Name"] = flipflop
// ? Uri.EscapeDataString("Mark+Radbourne")
? "Mark+Radbourne"
: "MarkRadbourne";
Console.WriteLine("Name=" + message["Name"]);
string[] keys = message.GetPropertyKeys();
Debug.Assert(keys.Length == 2 && keys.Contains("Number") && keys.Contains("Name"));
conn.SendEvent(message);
}
conn.DoWork();
Thread.Sleep(10);
}
}
public MessageCallbackArgs(IoTMessage message, UIntPtr userContextCallback)
{
ReceivedMessage = message;
UserContextCallback = userContextCallback;
Success = true;
}
