// the interrupt handler for the button
static void button_OnInterrupt(uint data1, uint data2, DateTime time)
{
// Send our message
NetduinoMQTT.PublishMQTT(mySocket, "/iot/status", "Ow! Quit it!");
return;
}
// The function that the timer calls to ping the server
// Our keep alive is 15 seconds - we ping again every 10.
// So we should live forever.
static void pingIt(object o)
{
Debug.Print("pingIT");
NetduinoMQTT.PingMQTT(mySocket);
}
public static void Mqtt2()
{
int returnCode = 0;
// You can subscribe to multiple topics in one go
// (If your broker supports this RSMB does, mosquitto does not)
// Our examples use one topic per request.
//
//int[] topicQoS = { 0, 0 };
//String[] subTopics = { "test", "test2" };
//int numTopics = 2;
int[] topicQoS = { 0 };
String[] subTopics = { "test" };
int numTopics = 1;
// Get broker's IP address.
//IPHostEntry hostEntry = Dns.GetHostEntry("test.mosquitto.org");
IPHostEntry hostEntry = Dns.GetHostEntry("192.168.100.8");
// Create socket and connect to the broker's IP address and port
mySocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try
{
mySocket.Connect(new IPEndPoint(hostEntry.AddressList[0], 1883));
}
catch (SocketException SE)
{
Debug.Print("Connection Error: " + SE.ErrorCode);
return;
}
// Send the connect message
// You can use UTF8 in the clientid, username and password - be careful, this can be a pain
//returnCode = NetduinoMQTT.ConnectMQTT(mySocket, "tester\u00A5", 2000, true, "roger\u00A5", "password\u00A5");
returnCode = NetduinoMQTT.ConnectMQTT(mySocket, "guest001", 20, true, "guest", "guest");
if (returnCode != 0)
{
Debug.Print("Connection Error: " + returnCode.ToString());
return;
}
// Set up so that we ping the server after 1 second, then every 10 seconds
// First time is initial delay, Second is subsequent delays
Timer pingTimer = new Timer(new TimerCallback(pingIt), null, 1000, 10000);
// Setup and start a new thread for the listener
listenerThread = new Thread(mylistenerThread);
listenerThread.Start();
// setup our interrupt port (on-board button)
InterruptPort button = new InterruptPort(Pins.ONBOARD_SW1, false, Port.ResistorMode.Disabled, Port.InterruptMode.InterruptEdgeLow);
// assign our interrupt handler
button.OnInterrupt += new NativeEventHandler(button_OnInterrupt);
// Subscribe to our topic(s)
returnCode = NetduinoMQTT.SubscribeMQTT(mySocket, subTopics, topicQoS, numTopics);
//***********************************************
// This is just some example stuff:
//***********************************************
// Publish a message
NetduinoMQTT.PublishMQTT(mySocket, "/iot/status", "Testing from NetduinoMQTT");
// Subscribe to "test/two"
subTopics[0] = "/iot/status";
returnCode = NetduinoMQTT.SubscribeMQTT(mySocket, subTopics, topicQoS, numTopics);
// Send a message to "test/two"
NetduinoMQTT.PublishMQTT(mySocket, "/iot/status", "Testing from NetduinoMQTT to test/two");
// Unsubscribe from "test/two"
returnCode = NetduinoMQTT.UnsubscribeMQTT(mySocket, subTopics, topicQoS, numTopics);
// go to sleep until the interrupt or the timer wakes us
// (mylistenerThread is in a seperate thread that continues)
Thread.Sleep(Timeout.Infinite);
}
// The thread that listens for inbound messages
private static void mylistenerThread()
{
NetduinoMQTT.listen(mySocket);
}