Have considered a plain old doorbel and a peep hole on the door?
Low tech, cheap, cheap to install, lasts a lifetime.
Heck, if safety is the concern, install a periscope. Yes, mirrora inside a tube, to get to see, from a distance, who is at the door.
You want footage? Photos?
Install a local camera. Like one of those that are setup by biologists to film animals in the wild. Triggered by motion sensing. Or talk with someone technically inclined and install a local system.
Have considered a plain old doorbel and a peep hole on the door?
Low tech, cheap, cheap to install, lasts a lifetime.
Heck, if safety is the concern, install a periscope. Yes, mirrora inside a tube, to get to see, from a distance, who is at the door.
You want footage? Photos?
Install a local camera. Like one of those that are setup by biologists to film animals in the wild. Triggered by motion sensing. Or talk with someone technically inclined and install a local system.