[BRLTTY] Rocker Switch Swap Vol. 14 Issue 95

[wmichaelb at fuse.net]

We've returned from a longish out of town trip, and I'm now retrying to install 
brltty on a new machine. The previous posting was as follows: 

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Today 's Topics: 

1. Power Braille 80 Rocker Switch Configuration ( wmichaelb at fuse.net ) 
2. Re: Power Braille 80 Rocker Switch Configuration (Dave Mielke) 


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Message: 1 
Date: Mon, 7 May 2018 09:58:43 -0400 (EDT) 
From: wmichaelb at fuse.net 
To: brltty at brltty.com 
Subject: [ BRLTTY ] Power Braille 80 Rocker Switch Configuration 
Message-ID: 
< 441511301.45548653.1525701523491.JavaMail.zimbra at fuse.net > 
Content-Type: text/plain; charset="utf-8" 

Hi, I've managed to get my friend's Linux setup to access his Power Braille 80 successfully, 
and I'm now trying to get the system preferences set up to what he prefers. I have read 
through the documentation on preferences and set some of them in the config file. Is there 
a way to reverse the functions of the two rocker bars on the Power Braille 80? I haven't 
been able to find a configuration entry that controls that preference. Thanks! 
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Message: 2 
Date: Mon, 7 May 2018 10:20:04 -0400 
From: Dave Mielke < dave at mielke.cc > 
To: "Informal discussion between users and developers of BRLTTY ." 
< brltty at brltty.com > 
Subject: Re: [ BRLTTY ] Power Braille 80 Rocker Switch Configuration 
Message-ID: < 20180507142004.GF24251 at beta.private.mielke.cc > 
Content-Type: text/plain; charset=us-ascii 

[quoted lines by wmichaelb at fuse.net on 2018/05/07 at 09:58 -0400] 

>I've managed to get my friend's Linux setup to access his Power Braille 80 
>successfully, and I'm now trying to get the system preferences set up to what 
>he prefers. I have read through the documentation on preferences and set some 
>of them in the config file. 

What do you mean by preferences? There are system-wide defaults (that are 
defined in /etc/ brltty .conf), and there are user-specific settings (that are 
stored in /var/lib/ brltty / brltty .prefs). It's the latter - the user-specific 
settings - that are commonly known as preferences because they can be (and 
really should be) modified from the braille device itself via brltty 's 
Preferences Menu. There's a way to do it from brltty .conf - with the 
override-preference directive - but that should only be done when absolutely 
necessary because it undoes changes made within the menu. 

>Is there a way to reverse the functions of the two rocker bars on the Power 
>Braille 80? I haven't been able to find a configuration entry that controls 
>that preference. Thanks! 

You can do that by editing the key table for the PB80. Assuming a normal 
install, you should be able to find it at: 

/etc/ brltty /Input/ts/pb80.ktb 

-- 
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: Dave at Mielke.cc | Ottawa, Ontario | Twitter: @Dave_Mielke 
Phone: +1 613 726 0014 | Canada K2A 1H7 | 


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------------------------------ 

End of BRLTTY Digest, Vol 14, Issue 95 
************************************** 
I used the Debian apt tool to install brltty from the debian repository; 
running the brltty command yields a version of 5.4. The 
operating system is Debian Linux 9.4. 
1.) I opened 
/etc/brltty/Input/ts/pb80.ktb 
with nano, and found five lines: 
title Power Braille 80 
assign routingRight1 81 
assign routingRight2 82 
assign routingRight3 79 
include pb_large.kti 
Neither I nor my friend understands what these entries refer to, 
and none mentions a rocker switch. What parameters should I 
change to reverse the rocker bar settings? Since I'm seven hours from 
his home in Chicago at the moment and could not connect a PB80 
to test or access the preferences file to see if that preference was there, 
I tried looking in /var/lib/brltty, but did not find brltty.prefs at all. 
2.) Also, to insure that the PB80 display starts at boot, I added the lines 



braille-driver ts 

braille-device serial:ttyS0 




to 

/etc/brltty.conf. 

Then, per another entry in the documentation, I edited 

/etc/default/brltty as follows: 


ARGUMENTS="-q -b ts -d /dev/ttyS0" 


Am I correct in assuming that these changes will automatically 

start brltty at boot? 


Thanks again for all your support. 








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