[BRLTTY] Brailliant Bi40X and bluetooth

[Dave Mielke]

[quoted lines by Isabel Ruffell on 2025/05/05 at 13:58 +0100]

>I have been using a HumanWare Brailliant BI 40X with a laptop running Debian Stable for a couple of years, and the connection via usb is reasonable. But I would like to get the bluetooth connection working, and have never managed to do so. Can this list help?

We can certainly try.

>This is where I have reached:
>
>1. I can see, pair and trust the device.
>2. I can induce the unit to think that it has connected with the laptop, and save the connection

What do you mean? Do you mean that you did an rfcomm connect? When trying to figure out a problem it helps to know the details.

>3. I can initiate a connection from the laptop.

By doing what?

>At this point it goes into a cycle of disconnecting and connecting.

What's reporting this, and are you able to quote the exact messages?

>Investigation of logs reveals two possibly interesting errors
>
>a) RFCOMM connect error (111): connection refused

Yes, I'd expect this error because the BI40X doesn't support a Bluetooth serial connection. It only supports Bluetooth HID.

>b) hidOpenBluetoothDevice error (38): function not implemented  

To me, this imlies that brltty, when built, wasn't configured to include HID support. Did you build it for yourself or is it provided by the distribution?

>I know the pairing process is different for this compared with (e.g.) the earlier BrailleNote Touch (c.2018) which I also have and which works. 

It shouldn't be. What do you believe that difference to be?

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