Sure. The purpose of the wyze app is to connect to the camera via the internet whether that be while in you’re home or when away.
When you’re home and connected to your network, you don’t necessarily need any other credentials to send and receive data or connect to devices that are already on the same network unless they are secured with a username and password. This is how computers on the same network share printers, storage devices, etc. They can talk to each other with or without a modem that has a connection to the outside. You just wont be able to access the internet.
Think about casting a video to your tv. All you need to do is have both devices connected to the same network router. If you’ve already downloaded the movie/show, you can cast without an internet connection. There is no need to send the video from your phone - to the cloud (internet) - to be downloaded again by your tv.
Wyze cams cant be setup until you download the app, create an account then enter your network credentials. The connection to the camera is then made when you scan the QRC code. Try doing this without internet and you’ll see what I mean.
If you’re connected to the camera viewing the live feed and unplug your internet, you’ll loose the connection. Even though both devices are still connected to wifi. Your camera will then show offline.
Let me be clear, the camera will still record view to the SD card, but it will not be online. You won’t receive anymore event notifications, events in the cloud wont be accessible and your app will tell you that it’s trying to reconnect.
In theory, you should still be able to access your camera using the assigned IP address. Logging into your modem/router when you’re not home is a way to do this remotely. You can use a browser, terminal or the command line to do so. Apps like iSpy replace the fore-mentioned methods making this process much more user friendly. This is not the case with wyze cams. They require you to access them via their app only. And the app needs an internet connection to work even in your own home/office.
The only way I’ve been able to use the camera without it sending data to the cloud first is to block TCP/UDP services in my router. That way the internet connection is active, but the camera can no longer communicate with wyze servers. The live feed works as it normally would, but I no longer have access to events in the app, nor do I receive alerts. It also disconnects when I lock my phone and has to be manually reconnected. When services are allowed all works as it should.
All companies are targets to hackers if they have valuable data. Feeding it to wyze even if encrypted from your phone to camera still gives hackers opportunity to access and review data that is not encrypted ON their servers. This is a security concern. Even 2FA can’t stop that from happening.
Hope that was a thorough explanation without putting you to sleep.