this post was submitted on 12 Mar 2025
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It would be great if more smart devices had a LAN-only control mode like my 3D printer, TV and AV receiver.
I would be perfectly happy if my iRobot phone app only worked from inside my network.
Doesn't apply to iRobot but there are lots of robot vacuums that can be flashed with an open firmware with just a USB UART cable: https://valetudo.cloud/pages/general/supported-robots.html
As for the other devices, my 3D printer, projector and AV receiver are all locally controlled.
Big +1 for Valetudo. I use it on a refurbished Roborock S7+ I got on eBay and it's fantastic.
Make sure to read their disclaimers, they're really not interested in expanding features, so make double sure it's sufficient for what you want.
I think it's just using MQTT, so block network access and use HomeAssistant
Your 3d printer has a NIC?
It's pretty common for newer 3D printers to have WiFi. Start/stop jobs, monitor cameras, or just to have a more capable UI than the built-in screen. Lots of people add this capability to older printers (or new ones with sucky interfaces) with OctoPrint.
And some brands of 3D printers have started placing those functionalities behind remote servers and paywalls
cough cough Bambu Labs cough cough
At that point, I wouldn't trust ANY device that cannot be controlled locally, either natively or at least through some hacks.
My cheap Conga robot came with a remote controller. It stopped connecting to its server long ago, but I can still use it. The battery is getting worse and worse, though.