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Processing Braille

Small picture of Braille Sense

Collection of braille experiments with processing, using an ancient (2004) HIMS Braille Sense.

  • can be used as braille terminal via serial port or USB
  • modern versions of Braille Sense still use the same protocol, but connect via bluetooth.

Sketches

  • braillekeyboard — simulation of a perkins keyboard with an on-screen braille line
  • brailleascii — translating keyboard input to braille using Braille ASCII
  • braillesense_input — simple demo of receiving input from a braille-sense device
  • braillesense – controlling the braillesense braille line from processing

Hardware

  • Braille Sense H-200

    • Portable Braille Computer
    • Perkins style keyboard, i.e. 8 keys for braille input
    • space, function and cursor routing keys
    • Braille line with 32 braille chars

  • Serial to USB Adapter (FTDI)

  • Make sure to start terminal mode on the braille sense and select the serial port:
    utilies > terminal for screenreader > serial port

Braille Sense Protocol

  • Reverse-engineered the incoming packages using HTerm
  • Discovered the structure of outgoing packages in the sourcecode of brlltty (See here)

License

MIT licensed