 
   // flashDebugLEDs();
   showUpdatedMembersOnLCD();
+}
+
+void wipeMembers(const char *event, const char *data) {
+  numCards = 0;
 }
 
 void checkCode(int code) {


  pinMode(LED_PIN, OUTPUT);

  Particle.subscribe("sentry/update-members", updateMembers);

  lcd.begin(16, 2);
  lcd.print("Connecting...");

// * rfid: string rfid code. Max 32 characters.
// * allow: 1 if the card access, 0 if it does not.
// * greeting: string that will be shown when the card is scanned. Max 32 characters.
void appendMembers(const char *event, const char *data) {

  // Split the data on tabs and new lines, since we know each row has 3 fields.
  const char delim[3] = "\t\n";
