Blockchain Energy Metering Node Kit with ESP32 + LED – Build a Tamper-Proof Energy Ledger

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

This kit taps directly into the intersection of energy monitoring and decentralized trust — the kind of project that’s landing top marks in Smart India Hackathon finals and redefining how we think about audit-ready power data. You’ll assemble a DIN-rail-mountable node that reads real-time energy consumption through dual INA219 front-ends and a PZEM-004T module, then cryptographically signs every reading before chaining them into an append-only ledger stored on an SD card. The ESP32 pushes selected blocks to the IOTA tangle, creating a permanent, publicly verifiable record. Every wire and component is included, from the prototyping boards to the soldering iron.

What You'll Build

You’ll put together a self-contained energy metering node that pulls precise voltage, current, and power metrics from the PZEM-004T and dual INA219s, timestamps them with a DS3231 RTC, and signs each data block with HMAC-SHA256. The ESP32 maintains a hash-linked chain on the microSD card — just like a lightweight blockchain — and optionally broadcasts the latest block to the IOTA tangle via masked authenticated messaging. The 0.96-inch OLED gives you on-device status, and the entire assembly fits inside a DIN rail enclosure ready for a real panel.

What You'll Learn

• Wiring and calibrating high-precision energy sensors such as PZEM-004T and INA219 with the ESP32
• Implementing HMAC-SHA256 digital signatures to guarantee data integrity at the edge
• Designing a hash-linked, immutable ledger on an SD card using block chaining techniques
• Transacting secured data into the IOTA tangle using public testnets and official libraries

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately