On 01/02/2018 12:17, Chris Green wrote:
Bill Wright wrote:

Any ideas anyone?

Quite separate from the door entry device, how about a little bullet
camera (or one with IR, or whatever) feeding into an AV input on the
telly? She'd need to know how to select the AV input but I expect she
could be trained. The cam could be positioned to make the best use of
the available light, which often means that the view of the caller is a
profile, which is OK I've found. Cam could be disguised if necessary.

Now that's an idea, separate the video completely from the door
opener. There's a key safe anyway so she could always tell the
visitor the number if she recognises them and, if she doesn't want to
do that, she can ask them to wait while she gets to her feet to answer
the door.

Thank you for the idea.

A slight variation which I have used a few times is to have a very small
monitor so they don't have to mess with the telly remote. It can be on
the shelf of the TV stand, or the sideboard, or on a coffee table near
the person's favorite chair. I've used little Roadstar 7" sets for this.
They're pretty good, if they're still available.

If you wanted the sound to come through the telly you could do it easy
with a little mike module costing less than a tenner (Google CCTV audio).

Incidentally, I'd suggest you avoid HD for this because of problems
interfacing it with the TV set or monitor (unless you want to spend real
money).