> LED lights consume not much power. How does that compare with the power used by a wifi + motion detector system running 24/7? It's barely a rounding error. S

> LED lights consume not much power. How does that compare with the power used by a wifi + motion detector system running 24/7? It's barely a rounding error. Sleeping the microcontroller, average current draw is a couple mA. LED lights draw around 500 mA. Regarding the HVAC, what I made is more focused on keeping the temperature balanced by taking a weighted average of temperatures across the house, with the weights adapting to where people are, similar to the Ecobee thermostats but DIY. It also has a web interface where you can view temperatures and power usage, which is far more useful than I thought it would be.