Is there a community specific to FOSS or just general privacy oriented IoT? With plenty of hardware discussion along with software. Routers, piholes, Meshtastic, anything IoT but open source. If it touches a network but you want it to do something it doesn’t. Flashing a doorbell camera with FOSS firmware. Hosting media servers on your phones Hotspot. Loading gcode to a printer from anywhere. There are so many things and possibilities.
If there isn’t someone should start one, OpenIoT or something catchy and relevant.
Could you tell me more about how secure the key exchange is?
Check the link I posted above, or you can look at the 802.15.4 wiki for an overview.
https://en.m.wikipedia.org/wiki/IEEE_802.15.4, scroll to the security section.
Thanks