“Elkrem is a Blockchain hardware development board. It allows Blockchain developers to integrate Dapps with hardware prototypes in an easy way without having deep knowledge in hardware development, and also allows electrical engineers and hardware developers to connect Blockchain to their hardware projects without having deep knowledge of how the Blockchain works,” said Saleh. “So they both can trigger actuators through smart contracts and log sensors data to smart contracts as well.”
The board is similar to an Arduino and has two processors, storage, and WiFi model. One processor runs a specialized Linux variant with interfaces to Ethereum, IPFS, Swarm, Whisper, Bitcoin, Status.im, and others. The other processor can do anything else you throw at it.
https://techcrunch.com/2018/08/21/elkrem-is-a-blockchain-dev-board-for-tinkerers/Vending Machine using elkrem board :
https://www.youtube.com/watch?v=ji5poE6WNeE