[BRLTTY] Using Brltty for Android without TalkBack

[Dave Mielke]

[quoted lines by Siena Trigiani on 2018/06/02 at 21:41 -0400]

>The Braille Display I have is a BraillePen 12 Touch. It doesn't have USB
>support, and can only be connected via Bluetooth. On the Android app, there
>doesn't seem to be any drivers for that particular display, but Brltty
>auto-detects the BraillePen when it's paired via Bluetooth to my tablet.

Assuming that you have a newer model of the Braille Pen, it emulates the Alva
EL12's protocol so it's most likely being handled by brltty's Alva driver.
Older Braille Pen models emualte the Voyager protocol. Doing what you did -
letting brltty autodetect it - is the best way.

>Will try to google the commands and see what I can find.

The commands are documented on brltty's web site. Go to brltty.app and click on
Documenation, then on Key Binding Lists, and then on Braille Device Bindings.
Now you have two choices - you can either click on Alva and then on Voyager
Protocol Converter or on Voyager and then on Braille Pen 12.

You mentioned not wanting to have TalkBack speaking: There's an unfortunate bit
of historical Android accessibility design that I don't think has been "fixed"
yet. Brltty uses an Android feature known as Accessibility Focus.
Unfortunately, this feature doesn't run as an entirely separate component. It's
buried within Explore By Touch, which, in turn, is buried within TalkBack. So,
for now, the most you can probably do is tell TalkBack to not talk.

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