I built a Decentralized IoT Data Sharing Marketplace where IoT devices can securely share and monetize sensor data. Each dataset is tokenized as an NFT to ensure ownership, authenticity, and traceability. Smart contracts enforce role-based access control for providers and buyers. The project solves trust and ownership issues in traditional IoT data sharing and helped me gain hands-on experience with Solidity, Hardhat, Ethers.js, and React.js.