Tim S wrote:

One day, when I get fancy, I'd love to put an electronic proximity lock on,
so I can just walk in when laden with shopping.


Simple way to do that. Trot along to the local vet and ask to be
microchipped (same as done to Fido the pet). Shouldn't cost or hurt (much).

Then ask about one of those RFID controlled cat flaps, which vets sell
at a discount rather than those offered online by JW ents. Gut one of
them and tie the electronics to an electrically operated lock and put
the sensor at a height somewhere close to the scruff of ye neck.

Sorted. Woof!

--
Adrian C