I see multiple recommendations for Odroid N2+. I’ve run HA on multiple platforms. Raspberry pi works, but its performance is lacking. The intel stuff takes too much power for a smart home controller. I support multiple family member all using Odroid N2+ with USB dongle for zigbee/zwave integration and have had no issues over multiple years. I believe the N2+ 4G memory is the best option when power, cost and performance are used to drive the decision. While I’m partial this is the route I’d go to get a debian bullseye image. The guys on the site that support that distro are very helpful. It has an integrate script to fully install HA supervised version. If you can’t figure out how to build the image file they will usually post one for you. A great platform with a great bullseye distribution. The Odroid also gives you standard GPIO pins, which can be used to integrate hardwired security sensors from an existing alarm system. You can even use a cell phone connected to USB to provide Cellular backup communication.
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