_handle = _scheduledThreadPoolExecutor.scheduleAtFixedRate(
					new Runnable() {
						@Override
						public void run() {
							try {
								float newTemperature = readTemperature();
								if (Math.abs(_temperatureRef - newTemperature) > .1f) {
									notifyListeners("temperature",
											newTemperature);
									_temperatureRef = newTemperature;
								}
								[b]boolean newLightState = readLightState();
								if(newLightState != _lightState) {
									notifyListeners("light", newLightState);
									_lightState = newLightState;
								}[/b]
							} catch (IOException e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
							}
						}
					}, 0, 5000, TimeUnit.MILLISECONDS);