Added SPPMulti example

examples/Bluetooth/SPPMulti/SPPMulti.ino

@@ -0,0 +1,68 @@
+/*
+ Example sketch for the RFCOMM/SPP Bluetooth library - developed by Kristian Lauszus
+ For more information visit my blog: http://blog.tkjelectronics.dk/ or 
+ send me an e-mail:  kristianl@tkjelectronics.com
+ */
+
+#include <SPP.h>
+USB Usb;
+BTD Btd(&Usb); // You have to create the Bluetooth Dongle instance like so
+
+// This will set the name to the defaults: "Arduino" and the pin to "1234" for both connections
+SPP SPP_1(&Btd); // This will allow you to communicate with two SPP devices simultaneously
+SPP SPP_2(&Btd);
+//SPP SPP_3(&Btd); // You can create as many instances as you like, but it will take up a lot of RAM!!
+
+// You can also set the name and pin like so
+//SPP SerialBT(&Btd, "Lauszus's Arduino","0000");
+
+SPP* SerialBT[2]; // We will use this pointer to store the two instance, you can easily make it larger if you like
+const uint8_t length = sizeof(SerialBT)/sizeof(SerialBT[0]); // Get the lenght of the array
+boolean firstMessage[length] = { true }; // Set all to true
+uint8_t buffer[50];
+
+void setup() {
+  SerialBT[0] = &SPP_1; // This will point to the first instance
+  SerialBT[1] = &SPP_2; // This will point to the second instance
+  //SerialBT[2] = &SPP_3; // You only need to uncomment this if you wanted to use another instance
+  
+  Serial.begin(115200);
+  if (Usb.Init() == -1) {
+    Serial.print(F("\r\nOSC did not start"));
+    while(1); //halt
+  }
+  Serial.print(F("\r\nSPP Bluetooth Library Started"));
+}
+void loop() {
+  Usb.Task();
+  for(uint8_t i=0;i<length;i++) {
+    if(SerialBT[i]->connected) {
+      if(firstMessage[i]) {
+        firstMessage[i] = false;
+        SerialBT[i]->println(F("Hello from Arduino")); // Send welcome message
+      }
+      if(SerialBT[i]->available())
+        Serial.write(SerialBT[i]->read());
+    } 
+    else 
+      firstMessage[i] = true;
+  }
+  if(Serial.available()) {
+    delay(10); // Wait for the rest of the data to arrive
+    uint8_t i = 0;
+    while(Serial.available()) // Read the data
+      buffer[i++] = Serial.read();
+    /* 
+      Set the connection you want to send to using the first character
+      For instace "0Hello World" would send "Hello World" to connection 0 
+    */
+    uint8_t id = buffer[0]-'0'; // Convert from ASCII
+    if(id < length && length > 1) { // And then compare to length and make sure there is any text
+      if(SerialBT[id]->connected) { // Check if a device is actually connected
+        for(uint8_t i2 = 0; i2 < i-1; i2++) // Don't include the first character
+          buffer[i2] = buffer[i2+1];
+        SerialBT[id]->println(buffer,i-1); // Send the data
+      }
+    }
+  } 
+}