Re: Maximum simultaneous Bluetooth connections
Re: Maximum simultaneous Bluetooth connections
- Subject: Re: Maximum simultaneous Bluetooth connections
- From: Dave Camp <email@hidden>
- Date: Tue, 19 Feb 2013 22:20:36 -0800
We've been in contact with Apple about that. We gave them sample hardware and code to reproduce the issue, so hopefully a future OS update will fix this.
Dave
On Feb 19, 2013, at 1:15 PM, Etan Kissling <email@hidden> wrote:
> Just found it:
>
> http://lists.apple.com/archives/bluetooth-dev/2013/Jan/msg00067.html
>
>
> On 19.02.2013, at 22:13, Etan Kissling <email@hidden>
> wrote:
>
>> Classic BT offers only 7 parallel connection even in theory.
>> The previous thread was also with BLE. Don't recall the date when it was posted
>> but it was this mailing list.
>>
>> On 19.02.2013, at 22:12, Sergei Shevlyagin <email@hidden>
>> wrote:
>>
>>> Thanks Etan! Just to be 100% clear this is an issue with BTLE not just
>>> classic BT?
>>>
>>> On 2/19/13 1:11 PM, "Etan Kissling" <email@hidden> wrote:
>>>
>>>> Sergei,
>>>>
>>>> There was a thread on this mailing list where streaming data over three
>>>> concurrent connections already created problems.
>>>> While 100 is theoretically possible, the current technology is not yet as
>>>> far progressed.
>>>>
>>>> Etan
>>>>
>>>> On 19.02.2013, at 21:07, Sergei Shevlyagin <email@hidden>
>>>> wrote:
>>>>
>>>>> Thanks for the answers. To make my question clearer:
>>>>> - Max # of simultaneous connections to an iOS device, e.g. iPad 4, using
>>>>> Bluetooth Low Energy
>>>>>
>>>>> I understand that according to Frederik there's no theoretical maximum,
>>>>> I
>>>>> wonder if anyone has hit an actual maximum.
>>>>>
>>>>> Thanks,
>>>>> Sergei
>>>>>
>>>>> On 2/19/13 9:14 AM, "Chris Hall" <email@hidden> wrote:
>>>>>
>>>>>> One of the engineers stated the number was 10 devices.
>>>>>>
>>>>>> Chris Hall
>>>>>>
>>>>>>
>>>>>>
>>>>>> Sent from my iPhone
>>>>>>
>>>>>> ----------------
>>>>>>
>>>>>>
>>>>>> On Feb 19, 2013, at 11:54 AM, Frederik Vibe-Petersen <email@hidden>
>>>>>> wrote:
>>>>>>
>>>>>>> Bluetooth LE supports many devices. The number '7' or '8' is within
>>>>>>> the
>>>>>>> Standard Bluetooth 2.1 (+EDR) which the iPhone support under the MFI
>>>>>>> program.
>>>>>>>
>>>>>>> As I have learned, the number of simultaneous connected devices is
>>>>>>> based on
>>>>>>> the actually memory in the iPhone, designated to the Bluetooth chip.
>>>>>>>
>>>>>>> The Bluetooth LE standard officially supports unlimited devices (see
>>>>>>> print-screen of the official document here:
>>>>>>>
>>>>>>>
>>>>>>> https://dl.dropbox.com/u/3817170/Bluetooth LE Official Document.p
>>>>>>> ng
>>>>>>> )
>>>>>>>
>>>>>>> So, as we don't know how much memory Apple designated to the Bluetooth
>>>>>>> LE
>>>>>>> protocol/hardware, and how efficient they have made it, it's hard to
>>>>>>> tell
>>>>>>>
>>>>>>> I don't remember seeing any official number from Apple?
>>>>>>>
>>>>>>>
>>>>>>> On 19/02/13 17.42, "Michael Kroll" <email@hidden> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>> I can remember that about 8 connections are supported at the same
>>>>>>>> time. Might
>>>>>>>> be wrong that it is only seven, but very sure that it's not 100+.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Dr. Michael Kroll.
>>>>>>>> --------------------
>>>>>>>> Blog: http://www.mkroll.mobi
>>>>>>>> Forum: http://forum.mkroll.mobi
>>>>>>>> Twitter: @dr_m_kroll
>>>>>>>>
>>>>>>>> Sent from iPhone.
>>>>>>>>
>>>>>>>> On 19.02.2013, at 17:37, Sergei Shevlyagin
>>>>>>>> <email@hidden>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> Does anyone know the maximum number of simultaneous Bluetooth LE
>>>>>>>>> connections
>>>>>>>>> that a device can handle? I'm working on an application that needs
>>>>>>>>> to
>>>>>>>>> collect
>>>>>>>>> data from many (100+) devices in real time.
>>>>>>>>>
>>>>>>>>> Thanks,
>>>>>>>>> Sergei
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>>>>>>>>
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>>>>>>>
>>>>>>> Med Venlig hilsen/ Best Regards
>>>>>>> Frederik Vibe-Petersen
>>>>>>> Export Officer
>>>>>>>
>>>>>>> Direct: + 45 4918 8169
>>>>>>> Mobile: + 45 4055 1821
>>>>>>> Mail: email@hidden
>>>>>>>
>>>>>>>
>>>>>>>
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