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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date:   Tue, 12 Jul 2022 12:52:44 -0700
Message-ID: <CABBYNZ+LytLtRwZBvZMgaiVnoR6AXeT7G4_n7DrZ_QgqZ8cTWw@mail.gmail.com>
Subject: Re: How does bluetoothctl work from the command line with gatt?
To:     John Klug <John.Klug@multitech.com>
Cc:     Linux-Bluetooth MailingList <linux-bluetooth@vger.kernel.org>
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Hi John,

On Tue, Jul 12, 2022 at 11:56 AM John Klug <John.Klug@multitech.com> wrote:
>
> >You will probably need to wait for the daemon to resolve the services
> >which will then export the attributes as D-Bus objects that can be
>
> >accessed by bluetoothctl,
>
> How long would one have to wait?  The following was typed manually from the command line:
>
> >> # bluetoothctl gatt.select-attribute f000aa22-0451-4000-b000-000000000000
>
> >> # bluetoothctl gatt.acquire-write
>
> >> No attribute selected
>
> >> # bluetoothctl gatt.write 0x01
>
> >> No attribute selected
>
> I had no idea whether the above is the correct syntax or not. I merely guessed, since the procedure does not appear to be documented.

I think the problem is that you are issuing the select-attribute and
then exiting, instead you will need to enter all the commands at the
same time otherwise the next time you call bluetoothctl it doesn't
have any attribute selected.

>
>
>
>
>
> John Klug
>
>
>
>


-- 
Luiz Augusto von Dentz