Blockchain application in internet of things for securing transaction in ethereum TestNet

Abstract

This system is designed by using Lolin D32 as the processor dan MPL3115A2 for the sensors. This system is designed to show that devices that based on Internet of Things (IoT) could be secured by using blockchain technology. The blockchain technology is based on Ethereum which will be tested in Ropsten Testnet network. Processor module connects to Internet through WiFi module which is one of the Lolin D32 features. This WiFi module connects to router which is used for designing and testing the system. This system wants to prove that the data which are acquired from sensor module MPL3115A2 (altitude, temperature and pressure) and positioning data could be sign and verify within the processor Lolin D32. Before sending the data, the data will be formatted. Data will be stored in smart contract. The smart contract is an Ethereum program which is written using Solidity language. This smart contract is delployed into Ropsten network. The numbers of testing that have been carried out are 516 times. These testings proved as success. The data which were sent to Ropsten network could be proved that they were recorded successfully. These are done by checking through etherscan.io.