D2.1 Interface specification and system architecture preliminary requirements

D2.1 represents the Software Requirements Specifications (SRS) of the CRISTAL technology platform. CRISTAL technology platform acquires data from sensors technologies developed in CRISTAL, stores and processes them to provide useful, easily accessible, and usable information to the pilots, in terms of KPIs, via dedicated Apps and Dashboards. D2.1 specifies the intended use, the intended audience (i.e. stakeholders, asset managers, etc.) and the user needs of CRISTAL technology platform for each of the pilots. D2.1 specifies the following requirements for CRISTAL technology platform: functional requirements, external interface requirements, interoperability with existing and already in use platforms at the pilots, system features, non-functional requirements (e.g. performance, safety, security, quality).