This project introduced me to Arduino, when in early 2013 I was looking around for home electricity monitoring systems. I found quite a few off the shelf products available, but they all seemed limited in flexibility, and expensive too. That’s how I discovered the excellent¬†OpenEneryMonitoring¬†project, a lively open source platform for energy monitoring. This was exactly what I was looking for, although it went far beyond my hardware and software knowledge. It has introduced me to the wonderful world of Arduino.

Over the years I have expanded this system to included temperature and humidity monitoring, and solar powered sensors, as in the overview graph below.

emon system overview

current configuration of my home energy monitoring system based on OpenEnergyMonitor.org

This setup allows me to store my data on a cloud server accessible from anywhere, and keep an eye on e.g. indoor humidity levels. I will add more sensors, probably based on recently made available cheap wifi chips rather than the original RF system above.

data visualisation on the cloud server showing humidity measurements of 4 sensors

data visualisation on the cloud server showing humidity measurements of 4 sensors

This project is documented in detail on a separate blog: Lantau kilowatt counter.

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