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Re: Peripheral UUID value is different from 1 iPhone to another

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Re: Peripheral UUID value is different from 1 iPhone to another

Subject: Re: Peripheral UUID value is different from 1 iPhone to another
From: Frederic Visticot <email@hidden>
Date: Mon, 23 Apr 2012 23:26:52 +0200

I'm really interested to understand why UUID is different from 2 iPhone/iPad...

Is it due to privacy ?

If it is the case, is it possible to turn privacy off to have the same UUID visible from any iPhone/iPad ?

Tx

On Mon, Apr 9, 2012 at 9:00 PM, <email@hidden> wrote:

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Today's Topics:

1. Bluetooth packets > ~1kB dropped (Peter Sine)
2. Peripheral UUID value is different from 1 iPhone to another
... (Frederic Visticot)

----------------------------------------------------------------------

Message: 1
Date: Mon, 09 Apr 2012 16:12:48 +0200
From: Peter Sine <email@hidden>
To: email@hidden
Subject: Bluetooth packets > ~1kB dropped
Message-ID: <email@hidden">email@hidden>
Content-Type: text/plain; charset=utf-8

Hi,

we are developing an application (for iPad2) that connects to
a custom build MFI device using the EAAccessory Framework via Bluetooth.
Small packets seem to work flawlessly but we are
experiencing problems when sending packets bigger than ~1kB.

Reading the docs we saw several hints regarding packet size,
encouraging the usage of 600-1000 byte packets.
Sadly our device has to send a fairly big initial header (~2kB)
which consequently gets dropped.

Are there any technical restrictions regarding packet size
on the MFI crypto chips? Or is there a way to set the MTU
on the software side?

Best regards,
Peter Sine
--
NEU: FreePhone 3-fach-Flat mit kostenlosem Smartphone!
Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a

------------------------------

Message: 2
Date: Mon, 09 Apr 2012 17:29:11 +0200
From: Frederic Visticot <email@hidden>
To: email@hidden
Subject: Peripheral UUID value is different from 1 iPhone to another
...
Message-ID:
<email@hidden">email@hidden>
Content-Type: text/plain; charset="iso-8859-1"

When I read the same tag UUID with the iPhone4S and with the "New iPad",
the tag UUID is different ...

I was thinking the UUID was unique for each device.

...and I was expecting the "see" the same UUID value from the iPad and the
iPhone...

Any explanation ?
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