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Re: [Linphone-users] hardware with secure key for linphone


From: Stuart D. Gathman
Subject: Re: [Linphone-users] hardware with secure key for linphone
Date: Mon, 04 May 2020 14:52:08 -0400
User-agent: Evolution 3.34.4 (3.34.4-1.fc31)

On Mon, 2020-05-04 at 20:00 +0200, Louis Holbrook wrote:
> Russell,
> 
> right :) the whole point of this exercise was NOT to use a PC. 

Mount an rPi3 in an old phone case.  If impedence of handset doesn't
match rPi audio input/output, buy one of the "retro" handsets with
smartphone compatible audio jack - it has impedence matching built in.

P
ros: mostly already done except for buttons/display and final
assembly/mounting cleverness (standoffs for the win!).

Cons: you'll have
to hook up buttons to GPIO and test how to read them.  Ditto for
display, or buy a designed for rPi display.

Anticipated answer: right :) the whole point of this exercise was NOT
to spend a week in hardware hacking.

Maybe it's easier to just buy a
retro handset, and plug it into an existing rPi case or other mini-pc
with more standard keypad/display.




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