   }
   else
   {
-    Serial.print("'NaN'");
+    Serial.print("null");
   }
   
   if (separator){

  }
}

int pingCoordinator(void){
    
    for(int i = 0; i<10; i++){
      blink(i);
      while(getCh() != NULL) ;       //Drain any pending chars on the serial.
      Serial.println("@PING");
      int c=0;
      while(Serial.available()<2 && c++<10){
          delay(400);
          blink(2, 50);
      }
      if (getCh()=='O' && getCh()=='K'){

  }
  else
  {
    Serial.print("null, ");
  }
}

