[BRLTTY] Focus 1 70 display and USB to serial adapter: possible connecting this scenario?

[Hammer Attila]

Dear List,


Unfortunatelly, possible my old Alva display are defected, so I tryed my 
another home have Focus 1 70 display.

Normal serial cable and normal serial 9 pin port the display work, but 
my second machine not have a general serial pin cable hardvare 
connector, so I buied a Genbird USB to serial 9 pin cable.

Both Ubuntu 20.04 and Debian 12 are correct detected my usb to serial 
cable, and created correct the /dev/ttyACM0 device.

In /etc/brltty.conf file I set braille driver related config key, and 
added following line into the config file:

braille-device    serial:ttyACM0    # First serial device.


Because the display shows only the focus 70 related status message and 
not the actual braille output, I restarted BRLTTY with sudo brltty -d 
/dev/ttyACM0 and -D fs command, and used the -L option.

I translated the possible relevant log file entries from hungarian to 
english with Google translator, but I don't what means the missing 
libraryes related error messages, and how possible correcting these issues.

The log file is created In Ubuntu 20.04 Mate edition, with Brltty 6.5 
revision.

If need, I have possibility to create a log file my test machine the 
Debian 12 Bookworm release, I not remember BRLTTY come my system from 
the backport repo or not.

Log file says following:

2024-12-21 at 15:18:38.446 [brltty] BRLTTY 6.5 rev BRLTTY-6.5 
[https://brltty.app/]
2024-12-21 at 15:18:38.447 [brltty] executing as the invoking user: root
2024-12-21 at 15:18:38.953 [brltty] BrlAPI Server: release 0.8.4
2024-12-21 at 15:18:38.954 [brltty] fs/libbrlttyxlx.so: cannot open shared 
object file: No such file or directory
2024-12-21 at 15:18:38.954 [brltty] cannot load screen driver: 
fs/libbrlttyxlx.so
2024-12-21 at 15:18:38.954 [brltty] screen driver not loadable: lx
2024-12-21 at 15:18:38.954 [brltty] fs/libbrlttybfs.so: cannot open shared 
object file: No such file or directory
2024-12-21 at 15:18:38.954 [brltty] cannot load braille driver: 
fs/libbrlttybfs.so
2024-12-21 at 15:18:38.954 [brltty] braille driver not loadable: fs
2024-12-21 at 15:18:38.954 [brltty] Speech Driver: no [NoSpeech]
2024-12-21 at 15:18:38.956 [server-main] another BrlAPI server is already 
listening on 0 (file /var/lib/BrlAPI/.0 exists)
2024-12-21 at 15:18:38.956 [server-main] error while creating socket 0


I forgot any grouping adding command, or set different the permissions 
if need use a braille display with an usb to serial cable?

Since eleven years I use my previous display with USB cable.


If anybody have any useful idea, please tell a hint if have a little time.


Kind regards,


Attila
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