I have just finished a unit for a year 8 STEM class. This is based on the resources available at Apps for good. Students team up to set up their own startup company and work together to design an IoT project that solves a problem. They back up their ideas with market research consult potential users. After this they create an IoT prototype and pitch their design to potential investors.
It is mapped against both Digital and Design Technologies ACARA standards.
Please find the pdf or OneNote or on this page: https://www.throughtheclassroomdoor.com/dt-resources/