Is it safe to place Spark Core Token number in a Webpage?

Good advice to keep your token secret! Here’s how to read you mac address:

  byte mac[6];
  Network.macAddress(mac);
  Serial.print("MAC=");
  for( int i=0; i<6; i++) {
    Serial.print(mac[i]>>4,HEX);
    Serial.print(mac[i]&0x0f,HEX);
    if (i != 5) {
      Serial.print(":");
    }
  }