Payment Layer for Unattended Merchandising (PLUM)

July 5, 2022

Quotidian Engineering and Development Corp. (Q.E.D. Co.) have released the first PLUM based products, integrating blockchain, cryptocurrency (e.g., Bitcoin, Ethereum, ERC-20 tokens including PLUM Coin), and “smart contract” technologies for vending. PLUM hardware also has interfaces for traditional unattended payments (bills, coins, credit/debit cards). Driver software for x86 PC and ARM embedded systems has been released as open source. PLUM eases accepting a variety of digital payments and offering loyalty rewards respecting customer privacy. Visit for more information.