Below are listed only the uncommented items in my current brltty.conf on the  rpi4. I will send the full  conf file also.


braille-driver	fs	# FreedomScientific; VFO, Vispero
quiet-if-no-braille	on	# [off,on]
pid-file /run/brltty/brltty.pid
privilege-parameters lx:path=/usr/sbin:/sbin:/usr/bin:/bin
privilege-parameters lx:scfmode=no # [no,log,fail,kill]
privilege-parameters lx:shell=/bin/sh
privilege-parameters lx:user=brltty
screen-driver	lx	# Linux
screen-parameters lx:HFB=auto # [auto,vga,fb,0-7]
screen-parameters lx:LogSFM=no # [no,yes]
screen-parameters lx:RpiSpacesBug=no # [no,yes]
screen-parameters lx:Unicode=yes # [yes,no]
screen-parameters lx:VT=0 # [0-63]
screen-parameters lx:WidecharPadding=no # [no,yes]
log-file /home/briantew/brltty.log
log-level debug,brldrv,inpkts,outpkts,scrdrv