Smart Energy Meter Using IoT with MQTT & SMS Alerts (ESP32 + PZEM-004T)

Ever wondered how much power your home actually consumes in real time? Not just the monthly bill, but live voltage, current, and power usage while things are running. That’s where this project comes in. It’s a Smart Energy Meter Using IoT that gives you real-time data and even sends alerts when something goes wrong. No bulky setup. No complicated hardware. Just an ESP32, a PZEM module, and a clean IoT workflow. What This Project Does At its core, this system tracks electrical parameters like voltage, current, power, and power factor. It sends this data to an MQTT dashboard so you can monitor everything remotely. And when something abnormal happens, like high voltage or unusual current, it sends an SMS alert straight to your phone. That extra layer of safety makes this more than just a monitoring tool. It feels like a smart watchdog for your home. Why PZEM-004T Makes Things Easy If you’ve worked with voltage or current sensors before, you know calibration can get messy. The PZEM-004T so