In iOS6.1, the problem was fixed maybe. works fine. On Fri, Jan 25, 2013 at 11:34 AM, Long LI <lilong@gmail.com> wrote:
I have same problem, Has anyone gotten a solution now?
1. Make a connection to the peripheral which succeeds. Attempt to discover services. Instead of receiving the didDiscoverServices callback, I get the didDisconnectPeripheral callback with ErrorCode=6, “The connection has time out unexpectedly”. It seems to be completely random when this happens. I’ve also seen cases where I am getting this disconnect at a later time (after subscribing to characteristics).
Best regards, Long LI http://www.bbshare.com Google Toolbar for Safari Google Multi-Account Launcher for Chrome QR Pro for iPhone
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On Wed, Nov 7, 2012 at 6:04 AM, Etan Kissling <kissling@oberon.ch> wrote:
One thing that would also help is the new interval that you are trying to switch to. iOS accepts intervals down to 18.75 ms. However, in the iOS Guidelines for Bluetooth accessories, it is noted that it is not recommended to go below 38.75 ms.
Etan
On 06.11.2012, at 19:07, "Borna Vojdani" <bornav@gmail.com> wrote:
Thanks for the reply Mike,
I as well have been using iOS5 and iOS6 devices, and have only noticed this specific error on iOS6.0 and iOS6.1 beta. It may be worth looking into the over the air data via a capture device if one is available to you in order to learn more. But based on my experience, and "unexpected timeout" is a fatal connection time radio dropout in which no termination packet is broadcasted by the peripheral.
I say so as I have also have experienced the error you mentioned: “The connection has time out unexpectedly”. I experience this error on a daily basis with moderate to heavy usage of the peripheral which includes connecting and disconnecting throughout the day. It seems to randomly surface and I have not discovered the root cause, at least in my case.
However, after looking through the over the air data, I can concluded that, for my case:
-During certain connection events, when the connection update request is replied to by the iPhone with a success message (result 0x000), something goes wrong in the timing/scheduling of the new rate as done by iOS/iDevice, and the peripheral drops the connection sans a termination packet immediately due to the confusion. This is why iOS seems to come back with "an unexpected timeout" error. The stack does not seem to be aware of any issues introduced, nor does is see a termination packet as one is not broadcasted by the peripheral due to fatal connection parameter settings.
-At times, this happens repeatedly until some measures are taken to reset the state of the device/BT; meaning that the connection fails multiple times until some intervention is done.
-It seems to be completely random. I have not been able to find a reliable method of reproduction.
I'm not sure if this is the same issue you are having, as you stated a disconnection occurring upon service discovery. I would however note that the default interval set by iOS is very short, and if there are not many services to be discovered and configured, this can happen rather quickly.
If this is happening often enough to you that is becoming a big issue, I would suggest temporarily disabling the update request as a method of diagnosis.
Best Regards,
Borna.
On Tue, Nov 6, 2012 at 3:39 AM, Michael Mallinson <Michael.Mallinson@entrust.com> wrote:
Hi Borna,
We do update the connection speed from the peripheral side but we are doing this after the iPhone subscribes to a characteristic. So this shouldn’t occur until after service and characteristic discovery has completed.
Cheers,
--Mike
From: Borna Vojdani [mailto:bornav@gmail.com] Sent: Monday, November 05, 2012 4:57 PM To: Michael Mallinson Cc: bluetooth-dev@lists.apple.com Subject: Re: Bluetooth LE problems with new iOS devices?
Hi Michael,
With respect to issue #1, is you're peripheral expecting, or initiating a "connection update parameter request" during the initial connection/discovery period?
Best Regards,
Borna Vojdani
On Mon, Nov 5, 2012 at 5:09 AM, Michael Mallinson <Michael.Mallinson@entrust.com> wrote:
Hi,
I’m curious if anyone has seen any issues with the iPhone 5 and 5th gen iPod Touch when used with Bluetooth LE.
I’m seeing several problems with some of these devices that I wasn’t seeing with the original Bluetooth LE capable devices (iPhone 4s/iPad 3). My application is using bluetooth-central mode and connecting to a Bluegiga BLED112 USB dongle. Currently using iOS 6.0.1 on all my test devices.
1. Make a connection to the peripheral which succeeds. Attempt to discover services. Instead of receiving the didDiscoverServices callback, I get the didDisconnectPeripheral callback with ErrorCode=6, “The connection has time out unexpectedly”. It seems to be completely random when this happens. I’ve also seen cases where I am getting this disconnect at a later time (after subscribing to characteristics).
2. Failures while trying to subscribe to characteristics which result in ErrorCode=0, “Unknown Error”.
3. Failures in the didDiscoverServices callback ErrorCode=0, “Unknown Error”.
The problems seem to be sporadic and don’t always occur. Interestingly, I’ve also got one iPod Touch that hasn’t shown any signs of these problems yet. I’ve been unable to reproduce these issues with the iPhone 4S/iPad 3 and have only seen them with the iPhone 5 and new iPod Touch. Other than the iOS device, the rest of the picture is the same.
· Bluegiga BLED112 USB Dongle
· Same version of the USB Dongle firmware, Windows driver and Windows application.
· iOS 6.0.1
· Same version of the iOS application.
It is my understanding that the new iOS devices are using a new WiFi/Bluetooth chip in them. I wonder if this could be contributing to the problems I’m seeing?
Michael Mallinson
Software Developer
Phone: (613) 270-2548
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