A little off topic, i don´t know your use case, but you can use an old phone as webcam, they will be better in quality than any IP camera.
A little example using my old galaxy s11. ( its connected to a pc using usb, airplane mode, no internet )
A little example using my old galaxy s11. ( its connected to a pc using usb, airplane mode, no internet )
Although, this probably works well for a device with a removable battery and that can be powered by USB alone.
Otherwise you may run into various issues caused by phone self-limiting power it takes from USB port. Some kind of negotiation needs to happen before the phone can safely raise the input power limits. If it needs more than currently allowed, it will just poweroff immediately, instead of satisfying the excess need from the battery.
I had assembled something like that for my old SGS2 alarm clock out of a POE-5V splitter, an USB otg adapter, an Uhubctl-compatible USB-HUB powered by the POE-Splitter, and assorted cabling including a lead to the internal battery terminal with the top bar of an old battery (It contains some electronics). UGLY. Does anybody know a pre-made device like that?
As an analogy, you have a 40 year old Ferrari in pristine condition that really doesn't have much work value, but still a fast classic car. also you daily drive a 5 year old cheap truck. if your daily breaks down, would you replace it with your Ferrari which is certainly "faster" and better quality?