I’ve moved all of the PCB work associated with specific IoT applications, as distinct from ‘raw’ prototyping, to the Arduino area of the website. As this project has progressed, this has become the more logical place for future developments in this area to be documented.
The IoT link still exists under the PCB menu item, but this link just redirects to the Arduino section. I will remove the PCB > IoT link altogether when the restructuring is complete.