RE: crashing bluetooth on device
RE: crashing bluetooth on device
- Subject: RE: crashing bluetooth on device
- From: Ephram Cohen <email@hidden>
- Date: Mon, 25 Apr 2016 14:45:59 -0700
To clarify:
I saw the issue on a different chip than the Nordic. My issue was similar enough to the OP's (locking up the BT stack on the iDevice) to warrant a response. I have no direct experience with the Nordic chip/stack misbehaving. Indeed, the project that I did do with the nRF51 some time ago did not suffer from this malady.
Ephram
-----Original Message-----
From: bluetooth-dev-bounces+ephram=email@hidden [mailto:bluetooth-dev-bounces+ephram=email@hidden] On Behalf Of Alex.SneedMiller
Sent: Monday, April 25, 2016 12:45 PM
To: email@hidden
Subject: RE: crashing bluetooth on device
Does that mean that the Nordic chip has an issue with its stack, or does the iOS stack have an issue where it can't handle a situation where an ACK doesn't happen?
How did you actually fix the issue? Are you able to get down to that low level when programming on an iOS device?
-----Original Message-----
From: bluetooth-dev-bounces+alex.sneedmiller=email@hidden [mailto:bluetooth-dev-bounces+alex.sneedmiller=email@hidden] On Behalf Of email@hidden
Sent: Monday, April 25, 2016 2:00 PM
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Subject: Bluetooth-dev Digest, Vol 13, Issue 40
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Today's Topics:
1. crashing bluetooth on device (Matthew Chung)
2. RE: crashing bluetooth on device (Ephram Cohen)
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Message: 1
Date: Sun, 24 Apr 2016 20:35:12 -0700
From: Matthew Chung <email@hidden>
To: email@hidden
Subject: crashing bluetooth on device
Message-ID:
<email@hidden>
Content-Type: text/plain; charset="utf-8"
I am working on a iOS 9+ ble app that talks to a Nordic nRF51. I have a couple remote beta testers who have reported after n number of successful connections, the bluetooth on their device stops working and the only way to fix it is to turn on/off bluetooth on the device. I am assuming something I am doing is crashing the bluetooth daemon but have not been able to reproduce this myself.
I wanted to know if this has happened to anyone else or if there are any suggestions on how to troubleshoot a situation like this?
--
*Matt Chung*
VersaMe <http://versame.com/>
email@hidden <email@hidden>
3 <720-273-9832>10-210-0956
*Pre-Order Now! <http://www.versame.com/>*
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Message: 2
Date: Mon, 25 Apr 2016 09:48:34 -0700
From: Ephram Cohen <email@hidden>
To: "'Matthew Chung'" <email@hidden>,
email@hidden
Subject: RE: crashing bluetooth on device
Message-ID: <021401d19f12$4fba6b60$ef2f4220$@batandcat.com>
Content-Type: text/plain; charset="utf-8"
Hi Matt,
I have seen it a few times. For me it turned out to be bad ACK/ NACK of a packet. Sometimes a packet would not get ACK’d, sometimes an extra ACK was added. I can not remember if both caused the lockup, but at least one of them did. I would even look for cases where you receive a packet, then send a packet, then ACK the received packet. This interleave of send and receive processes may confuse it also.
Good Luck,
Ephram
From: bluetooth-dev-bounces+ephram=email@hidden [mailto:bluetooth-dev-bounces+ephram=email@hidden] On Behalf Of Matthew Chung
Sent: Sunday, April 24, 2016 8:35 PM
To: email@hidden
Subject: crashing bluetooth on device
I am working on a iOS 9+ ble app that talks to a Nordic nRF51. I have a couple remote beta testers who have reported after n number of successful connections, the bluetooth on their device stops working and the only way to fix it is to turn on/off bluetooth on the device. I am assuming something I am doing is crashing the bluetooth daemon but have not been able to reproduce this myself.
I wanted to know if this has happened to anyone else or if there are any suggestions on how to troubleshoot a situation like this?
--
Matt Chung
<http://versame.com/> VersaMe
email@hidden <mailto:email@hidden>
<tel:720-273-9832> 310-210-0956
<http://www.versame.com/> Pre-Order Now!
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