I want to use my security system wires as well. I am doing some things you may want to be aware of. First, I has sent an email asking the Wyze tech support for the current draw for the camera. Note, the label on the bottom says 1 Amp. That seems high to me but I hope to have it confirmed. Once I have that value, I can run a voltage drop calculation. Here is a website to use. https://www.calculator.net/voltage-drop-calculator.html?material=copper&wiresize=26.42&voltage=5&phase=dc&noofconductor=1&distance=50&distanceunit=feet&eres=1&x=68&y=18
To use this calculator, you need to know the wire size, the voltage (5 V), the current, and the length of the wire. My four wire cables have size 22 AWG conductors. Using the suggestion above, if I couple both pairs to “create” two wires, the wire size is very close to AWG 19.
Anyway, using 1 amp, 5 volts DC, copper wire, 50 foot wire length, 19 AWG wire size, the calculator indicates the voltage drop is 0.81 volts. Then, Wyze will need to answer the question "will it operate at 4.19 volts?
If the answer is yes or if the real current draw is below 1 amp, then the next challenge is to find a way to make a connection. My plan, as probably yours, is to put my 5 volt power supply in the basement where my security wiring is located. I assume I need to take a USB cable, cut it and use the wiring in it to attach to the security wiring. In the other end, I will take the other part of the USB cable and attach to the security wiring and plug into the Wyze supplied power supply.
So, if anyone has and additional information, please share.