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Iot Blockchain

Iot Blockchain is an open-source proof-of-concept web application that demonstrates IoT device interaction through an Ethereum smart contract, using Flask, Web3.py, Solidity and a locally run Hardhat blockchain.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Iot Blockchain — OpenViST project profile in Apps & dApps.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when you want a local proof-of-concept environment for exploring IoT interaction through a smart contract, rather than a production-ready device service.

Who it is for

  • Developers exploring how a web app, Ethereum smart contract and IoT device can be connected.
  • Learners using a local sandbox to study Flask, Web3.py, Solidity and Hardhat together.
  • Raspberry Pi users interested in the project's optional GPIO control path.

Documented uses

  • Interact with an IoT device through the browser-based app.
  • Explore smart-contract-mediated device interaction on a local blockchain.
  • Study or adapt the components of a Python and Ethereum IoT demonstration.
Before you choose

Requirements & limits

The documented use is a locally run app opened at http://localhost:8000. The repository is public and licensed under MIT.

  • The blockchain is started locally with Hardhat; the documented workflow does not describe using a public Ethereum network.
  • Node.js 22+ and Python 3+ are prerequisites.
  • A Raspberry Pi is optional and specified for actual GPIO control.
  • The project is explicitly experimental, not production-ready, and not audited or security-tested.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Set up and open the local IoT demo

Start the documented local blockchain and Flask app, then open the web interface.

Before you start

  • Node.js 22 or later
  • Python 3 or later
  • A Raspberry Pi only if using actual GPIO control

Steps

  1. Install the project dependencies with npm install.

  2. Start the local blockchain with npx hardhat node.

  3. In a separate terminal, compile the contract with npx hardhat compile.

  4. Install Python dependencies from requirements.txt and start the app with python app.py.

  5. Open http://localhost:8000 in a browser.

Expected outcome

The local web app is available in a browser for interacting with the IoT device; actual GPIO control is associated with optional Raspberry Pi hardware.

Guide limitations

  • The project describes itself as experimental proof-of-concept software and not ready for production use.
  • The README says it has not been audited or security-tested.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
9 October 2026
Original website title
Salmandabbakuti/IOT-Blockchain · Official homepage title · retained in its source language
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