Print Spark Core MAC address

gistfile1.cpp

// Read the MAC address of a Spark Core which can't connect to the cloud yet.
// This is useful if you're on a network that requires MAC-based registration.
// Steven Bell <[email protected]>
// 28 November 2014
 
SYSTEM_MODE(MANUAL); // We can't connect to the internet anyway...
 
byte mac[6];
 
void setup() {
  Serial.begin(9600);
 
  // We have to turn WiFi on and try to connect, or else the MAC
  // call will just give us 0:0:0:0:0:0
  WiFi.on();
  WiFi.setCredentials("YOUR_WIFI_NETWORK");
  WiFi.connect();
}
 
void loop() {
  WiFi.macAddress(mac);
 
  Serial.print(mac[5],HEX);
  Serial.print(":");
  Serial.print(mac[4],HEX);
  Serial.print(":");
  Serial.print(mac[3],HEX);
  Serial.print(":");
  Serial.print(mac[2],HEX);
  Serial.print(":");
  Serial.print(mac[1],HEX);
  Serial.print(":");
  Serial.println(mac[0],HEX);

  delay(1000);
}