Recently I’d been delving into some Arduino Wifi projects using the following shields/modules;

• Arduino Mega 2560
• Official Wireless Proto Shield
• Roving Network WiFly RN-XV

There seemed a lack of documentation for these three components so this is how I got them to work together;

Bending pins 1 and 2 of the Proto shield inward so they don’t connect to the Arduino Board, and then connecting pins to the Serial1 bus;

• Shield Pin 0 to Arduino Mega Pin 19
• Shield Pin 1 to Arduino Pin 18

Using the WiFlyHQ library, and then altering the initialization line within projects like the following;

...
  wifiSerial.begin(9600);
  if (!wifly.begin(&wifiSerial, &Serial)) {
...

to

...
  Serial1.begin(9600);
  wifly.begin(&Serial1, NULL);
...