Breezer is an NFT marketplace that uses IoTeX-based ERC-721 tokens ("breeze NFTs") to bring transparency to food and pharmaceutical supply chains. The platform bridges real-world IoT sensor data with blockchain to rate, certify, and trade fresh produce and medicine batches.

Hackathon: IoTeX India Hackathon Online Prize: Integration Prize ($200 grant) Registrations: 1,500+ pan-India Status: Selected for live demo day pitch

Traditional food safety and pharmaceutical quality certifications rely on periodic inspections and paper trails. These systems are:

Slow — certificates reflect a point in time, not continuous conditions

Opaque — consumers cannot verify the actual handling of their goods

Centralized — a single authority controls the data, creating trust bottlenecks

For perishable goods — crops and medicines — storage conditions (temperature, humidity, pressure, light exposure) directly affect quality. Without continuous verifiable data, buyers cannot distinguish properly handled goods from compromised ones.

Breezer replaces static certifications with dynamic, IoT-backed NFTs. Each NFT represents a specific batch of crop or medicine and carries a freshness rating derived from real-time sensor data.

IoT sensors (via Tru-Stream) collect environmental data — temperature, humidity, pressure, light — throughout a batch's journey

Smart contract (CropNFT.sol) mints an ERC-721 token with a URI pointing to the aggregated sensor metadata on IPFS

Rating algorithm computes a freshness score (1–5) based on deviation from optimal storage ranges

Marketplace contract (Market.sol) lists the NFT for peer-to-peer trading

Buyers see verifiable provenance and freshness data before purchasing

ContractAddress (testnet) / Purpose

CropNFT - 0xF4E016aC4ddFf02946C997aEfd941Ce1d48Daa6b / Mint ERC-721 tokens with IoT metadata

URIMarket - 0x3160a2cf5A2649fe372262D775848d1bB75FC56F / List, buy, and manage NFT listings

Each batch receives a composite freshness rating based on four sensor dimensions:

The rating algorithm computes deviation from optimal ranges and normalizes the result to a 1–5 scale. This gives buyers a single at-a-glance metric backed by raw sensor data they can verify on-chain.

From 1,500+ registrations across India, Breezer was one of the few projects selected for live demo day pitching. The judges awarded the Integration Prize ($200) for:

Creative use of IoTeX's real-world data capabilities — Tru-Stream IoT data was not simply displayed but used as an active input to the rating algorithm and NFT minting pipeline

End-to-end workflow — from sensor → IPFS → smart contract → marketplace, the full data loop was demonstrated

Market fit — the intersection of IoT, blockchain, and supply chain transparency addressed a genuine pain point in agriculture and pharmaceuticals

Breezer's model applies directly to:

Farm cooperatives — prove organic handling, command premium pricing

Pharma logistics — demonstrate cold-chain compliance for regulators

Consumers — verify freshness before purchase with tamper-proof data

Insurance — validate storage conditions for claims

The same architecture can extend to any perishable supply chain — dairy, seafood, flowers, or vaccines — by adjusting sensor parameters and rating formulas.

The project was developed as a hackathon prototype. The core smart contracts are deployed on IoTeX testnet, the frontend demonstrates the full mint-to-market flow with simulated IoT data, and the design system ("Nebula Drift") provides a dark, premium visual identity.

For a production deployment, the next steps would involve connecting live Tru-Stream feeds, deploying to IoTeX mainnet, and building a backend service for continuous data ingestion and rating computation.