Just an extra bit of information about max Classic BT connections. It is true that there can only be 7 active devices in a piconet, but devices can get "parked." The park address is 8 bits. Not sure how many addresses are reserved, so 250+ devices can be parked plus 7 active. In order to communicate to a device, it is unparked then is a fully active member of the piconet. It can then be parked again if need be. As a side note, parking is more power efficient than sniff (not sure about sniff subrating). I have never actually used parking so YMMV. Ephram
-----Original Message----- From: bluetooth-dev- bounces+ecohen=soundid.com@lists.apple.com [mailto:bluetooth-dev- bounces+ecohen=soundid.com@lists.apple.com] On Behalf Of Sergei Shevlyagin Sent: Tuesday, February 19, 2013 7:59 PM To: Etan Kissling Cc: bluetooth-dev@lists.apple.com Subject: Re: Maximum simultaneous Bluetooth connections
Thank you!
On 2/19/13 1:15 PM, "Etan Kissling" <kissling@oberon.ch> wrote:
Just found it:
http://lists.apple.com/archives/bluetooth- dev/2013/Jan/msg00067.html
On 19.02.2013, at 22:13, Etan Kissling <kissling@oberon.ch> 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 <Sergei@discoverybaygames.com> 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" <kissling@oberon.ch> 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 <Sergei@discoverybaygames.com> 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" <chall@challtech.com> 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 ><fvp@scanomat.dk> > 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/Blueto oth%20LE%20Official%20Documen >>t.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" <m.kroll@mac.com> 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 >>> <Sergei@discoverybaygames.com> >>> 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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