Administrator rbAmp — Frequently Asked Questions Quick answers to the most common rbAmp questions — power, accuracy, I²C, addressing, energy, and integration. Power hardware Why is rbAmp 5 V-powered but the I²C bus is 3.3 V? Do I need external I²C p... Arduino energy-monitoring ESP32 esphome home-assistant I2C Jul 30, 2026 FAQ
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 Jul 29, 2026 Projects and Tutorials
Administrator Why Three Single-Phase Meters Can't Measure Your 3-Phase Power The setup everyone builds You have a three-phase supply and you want it in Home Assistant, so you do the obvious thing: three single-phase meters — a PZEM, a Shelly EM, an ATM90E32 board — one per pha... accuracy energy-monitoring home-assistant power-measurement sampling three-phase Jul 29, 2026 Tech Articles
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 Jul 29, 2026 Projects and Tutorials
Administrator rbAmp in the Home Assistant Energy Dashboard in 15 Minutes The problem this solves You want one honest number in Home Assistant: how much power this appliance is actually pulling, right now, and how many kilowatt-hours it burns over a month. The usual DIY ans... ct-clamp energy-monitoring ESP32 esphome home-assistant Jul 28, 2026 Projects and Tutorials
Administrator How CT Energy Measurement Really Works — From Clamp to Kilowatt-Hours You clip a current transformer around a wire, wire it into an ESP32, and Home Assistant lights up with watts and kilowatt-hours. Then you check it against the meter on the wall — and the numbers don't... accuracy ct-clamp current-transformer energy-monitoring home-assistant power-factor Jul 28, 2026 Tech Articles
