My Company's designing a new IoT system. To date, we've just used a whiteboard to visually represent the system, being network, devices and the power/data layers interconnections & flow.
Is there any off-the-shelf (ideally free) IoT-system-friendly planning software?
For reference, a result looking like the attachment would be fine - graphics are intuitive & simple.
We've gone with DrawIO, importing icons from a few different icon sites. DrawIO had pretty much no learning curve, made it easy to add text/notes & the arrows linking items were dynamic when the objects were dragged around... I can recommend.
That other pic was just a reference... Ours ended up looking readable enough, see below: