Appendix (Energy Monitoring with MQTT)

• http://hackaday.com/2014/12/29/reading-power-use-data-with-a-webcam-and-python/
• http://hackaday.com/2014/08/01/electricity-monitoring-with-a-light-to-voltage-sensor-mqtt-and-some-duct-tape/
• http://jonarcher.info/2014/03/arduino-based-electricity-monitor/
• http://nicegear.co.nz/blog/electricity-meter-usage-over-mqtt/