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There are a good amount of IoT devices that work offline and don't use public internet at all.

I specifically buy devices that aren't bound to the Internet and I've found a good amount.



Where do you typically find them? I've had very little luck with that


For one... Philips Hue. The lights connect to a Zigbee base station, which has a local API for controlling the system.

(The base station does connect to a WAN server for remote control, but you could always block that at your firewall. The system works entirely fine in local mode.)


The last time that I looked, the Hue/Zigbee/whatever protocols were still fighting over each other to become the standard. Has that settled down?


I'm pretty sure by definition IoT devices use the internet..




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