Build a 6-Circuit Home Energy Audit Logger with ESP32 and OLED Display

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Take control of your electricity bills with a professional-grade energy audit system that monitors six individual circuits simultaneously. This logger pairs two PZEM-004T sensors for full AC parameter capture on key appliance lines and four ACS712 modules for current-only tracking on lighting or socket circuits, storing hourly kWh data on SD card and serving a live web dashboard that displays your daily cost breakdown—ideal for Indian homes, rental properties, or small commercial setups aiming to identify power-hungry loads and shift usage patterns.

What You'll Build

By assembling this kit, you construct a DIN‑rail‑mountable energy logger that clamps onto six separate circuits, records real‑time power data with microsecond‑accurate timestamps from the DS3231, and generates a locally hosted web page showing per‑circuit kWh consumption and estimated daily cost. The OLED provides instant readouts at the panel, while the SD card stores long‑term logs you can analyse later. After 12–15 focused hours, you will have a working energy audit tool that makes it easy to spot inefficient appliances, track solar offset, or simply understand where your electricity rupees go each month.

What You'll Learn

• Wire and configure multiple PZEM‑004T and ACS712 sensors on a single ESP32 without electrical clashes
• Program an ESP32 web server that serves dynamic charts using real‑time sensor data
• Integrate a DS3231 RTC to timestamp every log entry precisely

  PZEM-004T on each of six circuits logs kWh per circuit per hour to SD. Web dashboard shows daily cost breakdown.

  What's in this kit

  • ESP32 Dev Board
  • PZEM-004T x2
  • ACS712 30A x4
  • DS3231 RTC
  • MicroSD Module
  • LM2596 Buck Converter
  • 0.96in OLED
  • 1000µF 25V Caps x4
  • 100nF Caps x10
  • PCB Prototype Board x3
  • DIN Rail Enclosure
  • 12V Adapter
  • Soldering Iron
  • Solder Wire

  Choose your assembly option:

  • Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
  • Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.