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

[Dave Mielke]

[quoted lines by Hammer Attila on 2024/12/30 at 17:53 +0100]

>I think the 1000 or 2000 MS perhaps will be too long wait time. What do you
>think?

I'd still like to know how high it needs to be to work reliably without hard-coding the baud.

>If you thinking need more increasing the wait time with larger value from 500
>Ms, I will be repeat the test.

Yes, I'd appreciate that testing.

>So, BRLTTY is more time right starting this USB adapter when I using the -d
>ttyACM0+baud=57600 option.

I think that's because there's a longer delay since that sets the 57600 baud a little bit earlier.

>Normal -d ttyACM0, or -d /dev/ttyACM0 newer automatically changing the baud
>rate in adapter side this usb serial adapter my experiences.

There are four variants that all mean the very same thing:

   serial:ttyACM0, serial:/dev/ttyACM0, ttyACM0, /dev/ttyACM0

This is all for backward compatibility to when brltty only supported serial communication, i.e. the /dev/ absolute path prefix is optional and the serial: communiction method is optional. The correct syntax is serial:ttyACM0.

You asked earlier (but I forgot to quote it) if you can specify the baud parameter in brltty.conf - yes, you can. For example:

   braille-device serial:ttyACM0+baud=57600

Since the delay seems to need to be so high, I think I'll probably add another serial device parameter for that.

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