Yes the ESP-12 works really well.  The ESP-8266 is now integrated with the 
Arduino IDE so moving code around is a breeze.  Although there are still some 
issues with sleep etc.  There are also a bunch of libraries like WiFi Scan, 
FTP, TELNET, NTP and OTA updating which make it quite simple to add in those 
features.  The 8266 is a bit of a power hog but otherwise it worked really well 
as a WiFi link and SD-Card interface.    I did put together a OSH board some 
time ago to build an ESP-TPDD based interface, it should be shared on OSH

In my case I just used the TELECOM program to set up the FTP or TELNET.  The 
FTP is only to the local SD-Card which can then be accessed via TP-DOS.  The 
only clunky part was booting from the ESP-TPDD as it does not support the 
control lines – too few pins – to react to the Model Ts serial pin status.

There are also some ESP-12 boards available with RS-232 ports that can be 
plugged directly into the Model T, I do not have the link though.

From: M100 
<[email protected]<mailto:[email protected]>> 
on behalf of c646581 <[email protected]<mailto:[email protected]>>
Reply-To: <[email protected]<mailto:[email protected]>>
Date: Wednesday, January 30, 2019 at 11:46 AM
To: <[email protected]<mailto:[email protected]>>
Subject: Re: [M100] TPDD emulator on Arduino

I've been thinking about an ESP8266-based TPDD emulator that can link up to an 
FTP site or act as a telnet to serial bridge at the flip of a switch.

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