How to access parse cloud functions using arduino?
I read api of Parse and there i got the class to call cloud function from 
Arduino.I hope it will help others.

 ParseCloudFunction cloudFunction;
 cloudFunction.setFunctionName(fnname); //String ("hello")
 cloudFunction.add("light_sensor", 139); //parameter

 ParseResponse response = cloudFunction.send();
 Serial.println(response.getJSONBody());