The context of this thesis is the development of the Envoy middleware software, a solution minded to simplify the integration of hardware peripherals for the automation of cash handling. This thesis has been developed within the innovation department of ARCA Technologies S.r.l., the producer of these devices. The company, based in Bollengo (TO), is the Italian branch of a wider company based in Mebane, North Carolina, USA. This project has successfully integrated, into the Envoy platform, the most successful cash automation device sold by ARCA, the CM18. Envoy is a middleware software, written in C++, that exposes an API (Application Programming Interface) that simplifies the integration of this kind of hardware devices into software applications.