I would like to fit a very simple camera at my mother's front door so that she can see who is calling without opening the door. She has a glass spy hole but they are not easy to view through (especially for the older folk).
1 Distance from camera to likely viewing point is only a few feet and could easily be cabled.2 It must either use common or garden batteries (and they must last well) such as AA or C - or it should run on mains.
3 I am not seeking an expensive solution - simple is fine.3 It must just work!
Any advice, suggestions, etc. warmly welcomed.