     int left = analogRead(PIN_LDR_LEFT);
     int right = analogRead(PIN_LDR_RIGHT);
     
+    light_level = left;
     
     Serial.print(left); 
     Serial.print(':');

  // Reset after 8 seconds, 
  // unless wdt_reset(); has been successfully called
  wdt_enable(WDTO_8S);
}

void goToSleep()
{
 
   // disable ADC
  ADCSRA = 0;  
  
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);

  //cli();
  
  power_all_disable();  // power off ADC, Timer 0 and 1, serial interface
  sleep_enable();
  // turn off brown-out enable in software
  MCUCR = bit (BODS) | bit (BODSE);  // turn on brown-out enable select
  MCUCR = bit (BODS);        // this must be done within 4 clock cycles of above
  sleep_cpu ();              // sleep within 3 clock cycles of above
  //sleep_enable();

  //sei();
  //sleep_cpu();                             
  sleep_disable();  
  MCUSR = 0; // clear the reset register 
  power_all_enable();    // power everything back on
  
  ADCSRA = (1 << ADEN); // ADC back on
  
} 

/**

    vw_set_tx_pin(PIN_TX);

    servo_horz.attach(SERVO_PIN_HORZ, SERVO_HORZ_MIN, SERVO_HORZ_MAX);
    servo_horz.writeMicroseconds(servo_horz_pos);

}

void loop()
