In this video, I used an extra Haloview wireless backup/rearview camera I have and repurposed it as my RV entrance door security camera. I mounted it over the RV entrance door using the porch light wiring to supply 12VDC power.
The Haloview wireless camera system records to a micro SD card located on the LCD display. So I'm able to have it record video and audio of anyone that comes to the door. Maybe I may even catch some wildlife on it.
I bought the 7" version Haloview for our travel trailer but do not want to make any holes for the camera mount as we plan to trade up after this summer season. I am fashioning a ladder bracket and also bought the haloview battery pack to make it even simpler. $70 US is a bit steep but the battery case is watertight and comes with 12v and a usb 5v adapter for charging plus has a magnet mount for those that have metal available. Quality battery (10,000 mah/19 hour run time) and adapters help to make the price palatable. While at camp I will remove it from the ladder and place it in the kitchen window for a security camera. Ray, thanks for the review and ideas.