One day I was wondering: how much electricity is flowing through my apartment right now? Looking online I found various sensor devices like Smappee and Sense, but those are relatively expensive and even require a subscription. So I decided to build my own with an ESP32 and the SCT-013 sensor. My very own Fitbit for electricity consumption!

Before jumping in, I set myself these goals for the project:

Make a non-invasive energy monitor for the entire apartment. Meaning: no wire-cutting and not putting a meter between every socket and light bulb.
Take measurements every second to get an accurate picture of electricity consumption.
Save all the data in the cloud for later use & analytics.
Have a simple app to visualize the data and analyze trends over time.
With those in mind, I started building my own home energy monitoring device!”


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