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Is it time to ring the alarm on internet door cameras?
(www.theguardian.com)
This is a most excellent place for technology news and articles.
I think you only need the controller or phone app for setup or config changes. Though it is easier, in my opinion, to just run a controller. You can (at least last time I checked) still self host one if you like. If you’re just doing network config and monitoring, you don’t need much in terms of performance.