[Swansea Hackspace] TechHub Buzzer/Access Project

[Justin Mitchell]

On Tue, 2014-11-04 at 14:04 +0000, Alan Cox wrote:
> On Tue, 4 Nov 2014 13:52:46 +0000
> Paul Harwood <paul at harwood-leon.com> wrote:
> 
> > Simply put - to answer the door remotely from within the building (not being tied to the handset).
> > 
> > Voice is required both ways really.
> 
> Probably the best you can easily do for wireless operation is to have a
> selectable pre-recorded messages so you can tell it to say
> 
> 	"Your call is important to us, my pet human has been summoned"
> 
> or similar while you get the actual unit itself.
> 
> Beyond that you are into trying to wire it into a VOIP box as a handset.

I wonder if this could be done with a Raspberry Pi class device with a
USB audio adapter for interfacing with the door system.

but putting together the software for the portable end, assuming use of
a mobile phone or tablet, is non-trivial