The hardware was assembled by connecting the Arduino UNO R4 WiFi, the PZEM 004T, the current transformer, and the OLED ...

Justin has helped readers get more out of their tools since 2009, writing tutorials, features, and reviews for a variety of publications.

Remember, today's documents aren't everything - just the first batch. That brings our live coverage to a close, but you can read more in our news story here and our piece detailing the day's key ...