Administrator Log Your Energy Data to an SD Card with Arduino — Timestamped CSV, No Cloud The monitors show it, the relay acts on it — this one keeps it . An rbAmp module, an Arduino, and a microSD card make a standalone data logger : timestamped voltage, current, power and kilowatt-hours ... Arduino csv data-logger energy monitor ESP32 I2C sd-card 30.07.2026
Administrator Meter Several Circuits with One Arduino — a Multi-Module rbAmp Bus The standalone monitor put one module on a screen. Real installations have more than one circuit — mains plus a few branches, or three phases. The naive answer (one meter per circuit, each on its own ... Arduino energy monitor ESP32 I2C multi-channel 30.07.2026
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 30.07.2026
Administrator Three-Phase Energy Monitoring in Home Assistant: 3× rbAmp UI on One ESP32 If you've read why three single-phase meters can't measure your 3-phase power , you know the trap: three independent meters sample at different instants, so their numbers don't add up. This is the bui... energy-monitoring ESP32 esphome home-assistant I2C three-phase 29.07.2026
Administrator Migrating from PZEM-004T to rbAmp — Keep All Your Home Assistant History Why leave a PZEM that works? A PZEM-004T is a fine little meter. It keeps its own kilowatt-hour total in EEPROM, so your energy survives a reboot, and for one circuit it does the job. You outgrow it f... energy-monitoring esphome home-assistant I2C migration pzem-004t 29.07.2026
