Start work on UDP auto-discovery system.

WiFiConnection/WiFiConnection.ino

@@ -7,22 +7,31 @@
 
 #include <ESP8266WiFi.h>
 
-char ssid[] = "AJ_HullFromHome_F1EAA6E5";
-char password[] = "humberbridge";
+char ssid[] = "ssid";
+char password[] = "password";
+
+// The address that the PixelHub beacon is broadcasting on.
+IPAddress beaconAddress(239, 62, 148, 30);
+// The port number that the PixelHub beacon is broadcasting on.
+unsigned int beaconPort = 5050;
+
+// A UDP Client to allow us to recieve UDP datagrams.
+WiFiUdp UdpClient;
+// A buffer to store recieved datagrams in.
+int datagramBufferSize = 256;
+byte datagramBuffer[datagramBufferSize];
 
 void setup()
 {
-  // put your setup code here, to run once:
+  // Setup the serial connection
   Serial.begin(4800);
 
   Serial.println("Hello, world!");
   
-  // Make sure that WiFi is supported
-
   Serial.println("Beginning connection sequence.");
   Serial.print("Attempting to connect to ");
-  Serial.print(" - ");
   Serial.print(ssid);
+  Serial.print(" - ");
   
   WiFi.begin(ssid, password);
   
@@ -35,13 +44,13 @@ void setup()
   }
   
   Serial.println("success!");
+
+  printWiFiInfoLocal();
 }
 
 void loop()
 {
-  delay(1000);
-  printWiFiInfoLocal();
-  delay(1000);
+  
 }
 
 void printWiFiInfoLocal()
@@ -49,3 +58,38 @@ void printWiFiInfoLocal()
   Serial.print("IP Address: ");
   Serial.println(WiFi.localIP());
 }
+
+void findServer()
+{
+  Serial.print("Initialising PixelHub auto detection system - ");
+  Udp.beginMulticast(WiFi.localIP(), beaconAddress, beaconPort);
+  Serial.println("success!");
+
+  Serial.println("Listening for PixelHub beacon pings.");
+  while(true) {
+    int datagramSize = UdpClient.parsePacket();
+    if(!datagramSize) continue;
+    
+    Serial.print("Received datagram #");
+    Serial.print(datagramSize);
+    Serial.print(" bytes in size from ");
+    Serial.print(Udp.remoteIP());
+    Serial.print(":");
+    Serial.print(Udp.remotePort());
+    if(datagramSize > datagramBufferSize) {
+      Serial.println(", but the message is larger than the datagram buffer size.");
+      continue;
+    }
+    Serial.println(".");
+    
+    Udp.read(datagramBuffer, datagramSize);
+    
+    Serial.print("Content: ");
+    for(int i = 0; i < datagramSize; i++) {
+      Serial.print(datagramBuffer[i], HEX);
+      Serial.print(" ");
+    }
+    Serial.print("\n");
+  }
+}
+