Administrator Build a Standalone Arduino Energy Monitor with rbAmp — Watts on an OLED, No Network Not every energy project needs Home Assistant, a cloud, or even Wi-Fi. Sometimes you just want a little box on the bench that says 230 V · 0.21 A · 48 W · 0.97 PF on a screen, updating every second — ... Arduino energy monitor ESP32 I2C oled 30 lug 2026 Projects and Tutorials
