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Date: Sat, 21 Mar 2015 11:02:30 -0700
Message-ID: <CAFPOs6o7fSh=-Jossgo_nLLz5iPpZA+GX+vxH7bezdQSk1_j-w@mail.gmail.com>
Subject: Re: register HID with SDP error
From: Maksim Yevmenkin <maksim.yevmenkin@gmail.com>
To: Waitman Gobble <gobble.wa@gmail.com>
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Cc: "freebsd-bluetooth@freebsd.org" <freebsd-bluetooth@freebsd.org>,
 Iain Hibbert <plunky@ogmig.net>
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[...]

> Hey, that works! Thank you.
>
> hccontrol Write_Class_Of_Device 02:50:40

great! as i said, you can also automate it. please read
bluetooth.device.conf(5). in your case you will need to create
/etc/bluetooth/ubt0.conf and add

class="02:50:40"

this way class will be applied every time you start ubt0 device.

> so now I have to figure out how to send the PIN that the connecting
> device demands to receive. I suppose it's sending 0000. But it appears
> there has to be a human action in this case.

you have a couple of options here:

(1) use hcsecd(8). since you want to pair with any host (because your
code implements device) you can use default entry. please read
hcsecd.conf(5) for more details.

    device {
             bdaddr  00:00:00:00:00:00;
             name    "Default entry";
             key     nokey;
             pin     "0000";
     }

something like this might work;

(2) write your own code. basically, you want to open raw HCI socket
and listen for PIN code and link key requests and events. hcsecd(8)
source code can be used as reference;

thanks,
max