Dear Dave, Thank you for the comments. I will update the firmware accordingly. Actually this is what I am looking for to develop the firmware.
Can you point me to other standards that I need to comply with? Blessings Song On Fri, Nov 19, 2021 at 7:23 PM Dave Mielke <[email protected]> wrote: > [quoted lines by Songpakorn Punongong on 2021/11/19 at 11:28 +0700] > > >The protocol for braille code in Bluetooth strings is very simple. It > >starts with [brl] followed by a hexadecimal number for each column of > >braille stream. > > I think it'd be a good idea if you were to add a cell count before the > braille cells as that'd allow you to have braille displays of various sizes > without altering the protocol. Of course, you should then also have a way > to query the cell count. > > >Each bit of that number represents each row of braille cells. For example, > >the bluetooth string "[brl]703370337033" will display "LGLGLG" on the > >device. > > I think you should be using the official standard for this, i.e. ISO > 11548-1. Dot1 is 0X01, Dot2 is 0X02, ..., Dot8 is 0X80. Not only is this a > standard, but it's also compatible with the Unicode Braille Patterns row. > > -- > I believe the Bible to be the very Word of God: http://Mielke.cc/bible/ > Dave Mielke | 2213 Fox Crescent | WebHome: http://Mielke.cc/ > EMail: [email protected] | Ottawa, Ontario | Twitter: @Dave_Mielke > Phone: +1 613 726 0014 | Canada K2A 1H7 | > _______________________________________________ > This message was sent via the BRLTTY mailing list. > To post a message, send an e-mail to: [email protected] > For general information, go to: http://brltty.app/mailman/listinfo/brltty > -- Songpakorn Punongong, Mr. CEO & CTO ReadRing Co., Ltd. Tax ID: 0105560141347 www.read-ring.com 328/1 Memorial Building of Ray C. and Elizabeth Downs, 2nd Floor PhayaThai Road, Thanon Phetchaburi Sub-district, Ratchathewi District Bangkok 10400, THAILAND +66813510162
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