[BRLTTY] Help to create a new braille device

[Dave Mielke]

[quoted lines by Jagdish Panda on 2021/06/25 at 15:43 +0530]

>the display is based on mini vibrators where the user can feel the point vibration of each dots on the braille display. 

What's that like on the battery, though.

>This is more affordable than expensive piezoelectro mechanical display. 

The Piezzo electric crystal approach may be more expensive per dot, but it only draws on the battery whenever a dot's position needs to be changed. After that, the dot's position is maintained by a charged capacitor which only needs to be replenished every once in a long while. So, although the hardware cost is greater, the battery cost is lower. It's an interesting trade-off so I'm curious.

>After having a glance at the code, I couldn't figure out what is the protocol to be followed to communicate with BRLTTY, how to send key inputs and receive data. Also what drivers to use.

Brltty doesn't have a specific protocol. If you've looked at the code then you know that it has a lot of drivers. That's because, for the most part, each braille device manufacturer uses its own protocol. And, in case you're going to ask, no, I don't think there's such a thing as the best protocol. Each one has typically been designed to support the kinds of controls that it's manufacturer is using.

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