This is old but it came up first on Google for wyze cam hardwire so hopefully I can prevent some people from some of these replies. First, the wyze camera wants 5vdc & doesn’t care what method you use to get it to it as long as it’s end is a micro B USB. These replies that “never heard or saw a USB to 120vac adapter before”… Yes you have if you have ever charged your phone using a wall outlet! The little square block that comes with the camera is exactly this excerpt for hardwire it uses 2 prongs to connect to your homes electric.
Powering over POE is perfectly fine and you are running low voltage everywhere vs Romex … You can safely tuck rated network cable behind your siding, cut it to a perfect length, add length to it, without being an electrical engineer. “But wyze doesn’t support POE”? Again, the camera doesn’t have anything to do with how you deliver power. A POE injector plugged into an outlet in your garage, a network cable thru the garage attic and up the roof peak pushed thru an 1/8" hole and a dab of clear silicone… what could be easier? It doesn’t support 40v POE input but as long as you transform down to 5v on one end or the other you are doing exactly the same procedure as nearly every electrical device you own.
You need one end to get power from an outlet out breaker and the other end of the cable convereft to micro B USB. It doesn’t matter how you do this. You can direct wire to wire, rj45 to micro B adapter, cut the existing wyze camera cable… It doesn’t matter. Plug a USB A to rj45 adapter into a good 120vac to 5vdc power adapter. The one that came with the camera was good enough for them so use it or if you have a better one laying around maybe use it instead. Route your network cable to the location you wants the camera crimp on a male rj45 end or wire to a strip and screw down surface mount keystone jack. Plug this end into arj45 to micro B adapter and then the micro B into the wyze camera and I guarantee you that it isn’t going to know the difference.
This will not shock you or burn your house down. Your old telephone wiring stapled to the 2×4’s in your basement is 40vdc. Your coax cable going to your internet or cable box is 24vdc… you could lay in a mud puddle with these bare wires and not get shocked 