Hi Dan!

09 Nov 2017 21:12, from Dan Clough -> TONY TOON:

 TT>> Not software, and you're probably already aware of it, but there's
 TT>> the WiFi232. It's designed to attach to old devices and acts like a
 TT>> modem but routes the connection over TCP/IP. It accepts
 TT>> ATDT127.0.0.1 and functions exactly like you're looking.
 DC> Yes, that is exactly what he's looking for.

 DC> Problem is, they are not available.  The guy who makes them only turns
 DC> out small batches and it's been sold out for months.  Supposedly going
 DC> to be more coming "some day".  Arggghhh.

It uses an ESP8266 with a specific programming.
See eg here https://github.com/jsalin/esp8266_modem

You will also need level converters to shift to the correct voltages.

CU, Ricsi

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