ISO/IEC TR 30166:2020 pdf. Internet of things (IoT) — Industrial IoT. ISO/IEC TR 30166:2020 (E) describes the following: general Industrial IoT (IIoT) systems and landscapes which outline characteristics, technical aspects and functional as well as non-functional elements of the IIoT structure and a listing of standardizing organisations, consortia and open-source communities with work on all aspects on IIoT; ...