February 2013 - Bluetooth-dev

Re: Maximum simultaneous Bluetooth connections
by Njection Gmail 19 Feb '13

19 Feb '13

With that many devices you hit two limits 1) piconet and 2) bandwidth on the Bluetooth radio. You would have to use multiple computers. Sent from my iPhone On Feb 19, 2013, at 8:37 AM, Sergei Shevlyagin <Sergei(a)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 > _______________________________________________ > 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: > https://lists.apple.com/mailman/options/bluetooth-dev/njection%40gmail.com > > This email sent to njection(a)gmail.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: https://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: Maximum simultaneous Bluetooth connections
by Michael Kroll 19 Feb '13

19 Feb '13

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(a)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 > _______________________________________________ > 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: > https://lists.apple.com/mailman/options/bluetooth-dev/m.kroll%40mac.com > > This email sent to m.kroll(a)mac.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: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Maximum simultaneous Bluetooth connections
by Sergei Shevlyagin 19 Feb '13

19 Feb '13

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Re: Catching CBPeripheralManager disconnect
by Etan Kissling 18 Feb '13

18 Feb '13

Arvydas, that is intended, as multiple apps on another iPhone may be connected with your peripheral app. Therefore, it is not possible for the iPhone to know when a specific client connects / disconnects, and it is also the reason why you cannot disconnect a link from the peripheral side. You will have to achieve that with an own method. In my case, I'm using periodic reads as a keep-alive mechanism. When the read does not occur regularly, the connection is considered timed out and the GUI accordingly updated. Etan On 18.02.2013, at 19:28, Arvydas Sidorenko <asido4(a)gmail.com> wrote: > I noticed that there are no delegate reporting when central > disconnects on demand or on poor signal and no samples I have seen > deals with that. Any ideas how this can be achieved on current iOS > version? > _______________________________________________ > 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: > https://lists.apple.com/mailman/options/bluetooth-dev/kissling%40oberon.ch > > This email sent to kissling(a)oberon.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: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Catching CBPeripheralManager disconnect
by Arvydas Sidorenko 18 Feb '13

18 Feb '13

I noticed that there are no delegate reporting when central disconnects on demand or on poor signal and no samples I have seen deals with that. Any ideas how this can be achieved on current iOS version? _______________________________________________ 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: https://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: Listening to advertisment while in the background
by Khaos Tian 18 Feb '13

18 Feb '13

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Listening to advertisment while in the background
by Jimmy Adler 18 Feb '13

18 Feb '13

I am working with a custom BLE device that is outputing temperature measurements in its advertisment data, there are no connections made to the peripheral from my application, since all the information I require is already in the advertisment. Since there is no service available, i use nil for services in my call to scanForPeripheralsWithServices. This works fine in the foreground but not when running in the background, which is critical for my application. I have tried bluetooth-central as UIBackgroundMode but do not get any advertisement data. I have read some on this mailing-list about the issue and I understand that when using nil as the service list, this is the expected behavior. So in an attempt to work around this, I have also tried to enable the audio background mode and used a timer to make sure the application is fully running in the background (I know this is not a good way to do this and would probably get rejected if released in the appstore), but the BT stack seems to behave the same as it does when in sleep or background mode (ie. I do not get any advertisment data at all). So my question: Is there any way of reading the advertisments when in the background when using nil as a parameter scanForPeripheralsWithServices? Best regards, Jimmy _______________________________________________ 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: https://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: BT data transfer and WiFi incompatibles on new MacBook Pro
by Anton Albajes Eizagirre 18 Feb '13

18 Feb '13

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Re: Device UUIDs
by John Riley 18 Feb '13

18 Feb '13

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Re: Can't discover CBPeripheralManager services
by Etan Kissling 17 Feb '13

17 Feb '13

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