A simple IoT and Blockchain based application to demonstrate the use of blockchain in IoT.

• Node.js
• Python
• Windows 8+ (for simulating GPIO pins on Windows), Raspberry Pi (for using actual GPIO pins)
• Windows Build Tools - Only for Windows (Simulating GPIO pins on Windows)

Note: Windows Build Tools is required to install web3. Install through Powershell(Admin) if not installed already

npm install -g windows-build-tools

Before starting with app, you need to compile the smart contract and start a local blockchain. Follow the steps below to do so:

1. Install required dependencies:

npm install

2. Start a local blockchain using Hardhat:

npx hardhat node

3. Compile contract in a separate terminal:

npx hardhat compile

4. Install python dependencies and start the app:

pip install -r requirements.txt

python app.py

Open https://localhost:8000 in your browser to see the app and Interact with the IoT device.

• Flask - The web framework used for the backend
• Web3.py - Python library for interacting with Ethereum blockchain
• Hardhat - Ethereum development environment for compiling, testing, deploying, and interacting with smart contracts
• Solidity - Ethereum's smart contract programming language
• GPIO Simulator - Python library for simulating GPIO pins
• RPi.GPIO - Python library for accessing GPIO pins on Raspberry Pi

This is experimental software and subject to change over time.

This is a proof of concept and is not ready for production use. It is not audited and has not been tested for security. Use at your own risk. I do not give any warranties and will not be liable for any loss incurred through any use of this codebase.

This project is licensed under the MIT License - see the LICENSE file for details