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Emulate stentura SRT 200 stenograph machine serial protocol on arduino

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StenturaArduino

The goal of this project is to make a US Stentura 200 SRT stenograph machine compatibile with italian stenotype system. Since I was not able to reverse engineer RS232 pin layout, I used an Arduino Micro to interface switches and convert data. I did not implement the Stentura SRT Protocol, but a simpler one used by WinSteno 2000 softare.

Story of the project

Reverse engineer serial pin layout - FAIL

does not work maybe custom voltage are used? there's a 3k5 resistor on I/O after MAX232 TTL to RS level converter need to buy stentura srt cable and try again

Interface an arduino controller to the key latches board - WORKS

he did the hardwork before me: https://github.com/balthamos/steno-arduino

Italian SRT 200 machine - WORKS

On italian market, the distributor company changes all the boards with a custom PIC and custom protocol. I reversed engineered the WinSteno protocol to be compatible with PC Software used by italian stenotypists.

Next steps

  1. Reverse engineer RS232 with stentura srt cable (so that other people can save 30$ )
  2. Document arduino board layout / develop a PCB for more robust handling
  3. Develop a Plover driver using WinSteno protocol, just to get rid of proprietary software...

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Emulate stentura SRT 200 stenograph machine serial protocol on arduino

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