def METHOD_NAME(self, key, value, timestamp):
    self.round_trip_final_end = timestamp
    self.device_time_final = float(value)
    self.round_trip_final_time = self.round_trip_final_end - self.round_trip_final_start
    self.log("Device final time {} ".format(value))
    # compute the test results and send to device
    results = "pass" if self.compute_parameter() else "fail"
    self.send_kv(results, "0")