December 2011 - Bluetooth-dev

is Core Bluetooth/ATT available on iPad2 with iOS 5?
by Stephen Bannasch 07 Dec '11

07 Dec '11

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com Is Core Bluetooth/ATT available on iPad2 with iOS 5? I know I will be able to do this on the iPhone 4S. _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… Will I be able to use Core Bluetooth on an iPad2 with iOS 5 and use the ATT (Attribute Protocol) to communicate with a Bluetooth Low Energy devices. This email sent to site_archiver(a)lists.apple.com

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Re: MAximal number of bluetooth devices in a room/building
by Jim Thompson 05 Dec '11

05 Dec '11

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: MAximal number of bluetooth devices in a room/building
by Matthias Ringwald 05 Dec '11

05 Dec '11

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com Hi No hard facts, but some general points. Bluetooth uses Piconets in which devices use frequency hopping on 79 channels. If two Piconets are one the same channel in one slot, this will likely lead to a communication error. So, what counts w.r.t to interference is the number of different Piconets in one room as opposed to the number of total devices. If those 30 devices are connected to 5 PCs, there won't be much interference. If they form 15 Piconets, it gets worse. I think I read that Bluetooth breaks down with 30-40 Piconets in one place and assume it was a theoretical academic paper. The simplest way to figure that out would probably be to test it yourself, the maths for that certainly was complex. :) Best Matthias On Dec 5, 2011, at 9:07 AM, Vincent Dal wrote: > Dear all, > > As a provider of PBX functionalities over GSM phones, many of our customers want to use bluetooth handsets or headsets. > One of our suppliers has expressed his (un-founded) opinion that more then 30 simultaneous Bluetooth connections in the same room might bring interference and therefor problems. > > However, using my limited technical knowledge and the huge forum that is the world wide web, I can not find any ground for his statement, nor any confirmation for it. > > Would anybody be able to inform me if his point is valid, and if so what is the maximal number of users. > > The same supplier stated that, if problems occur, users should keep their phones close to their Bluetooth device. To me, this is bullocks, but as said before I am far from an expert in this matter. > > I hope this forum can bring some knowledge to my person. > > Although about 60% of our client are iPhone users, I cannot assure anyone that only apple devices would be used. > > Vincent Dal > Pre-Sales Consultant > > <image001.jpg> > > vincent.dal(a)onephone.be > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/bluetooth-dev/mringwal%40inf.ethz.ch > > This email sent to mringwal(a)inf.ethz.ch _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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MAximal number of bluetooth devices in a room/building
by Vincent Dal 05 Dec '11

05 Dec '11

site_archiver(a)lists.apple.com Delivered-To: bluetooth-dev(a)lists.apple.com Thread-index: AcyzJDt9R0mlOvBeS9qGm9h1mcUKLg== Thread-topic: MAximal number of bluetooth devices in a room/building _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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