Abstract
AbstractThis paper presents a blockchain-based approach to machine data capturing and storage using Hyperledger Fabric with a low-cost, esp32 microcontroller. Our research focuses on the immutability of captured data to ensure that data on the blockchain is valid for use by customers and manufacturers. This requires an embedded implementation to sign collected data before it reaches modern IT environments like IoT gateways or programmable logic controllers (PLC). We discuss the challenges and advantages of using Hyperledger Fabric compared to an already validated implementation based on Ethereum technology. The proposed method demonstrates a solution to overcome the challenges that result from the Hyperledger Fabric communication protocol in an embedded environment. We thus illustrate both the technical design of the implemented logic on the microcontroller and the implementation of the distributed messaging protocol within Hyperledger Fabric. In our study, we validate the implemented method and perform a quantitative comparison with existing solutions from information technology. At last, we discuss the limitations of the proposed method and give an outlook on approaches that can potentially solve them.KeywordsImmutabilityData exchangeBlockchainData integrity
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