LL_STATUS_ERROR:instant passed

Xiaoming Lan

Prodigy 125 points

Below is the detailed process of problem:

1.Let a keyfob in advertising,

2.Lauched the App of iPhone5(iOS version:6.1.0) ,to scan keyfob

3.Then the link was established.

4.Soon,After a few seconds,the link was terminated.

5.Keyfob in advertising again,and iPhone5 scaned again

6.Then the link was established again

7.Then the link was terminated again

8.Loop step1-7.

I fount the reason of link terminated was Instant passed,That is to say HCI Error Codes is:0x28.

Why will appear this problem, how to solve it? What does the error code meam?

over 12 years ago

0 Morten Braathen over 12 years ago

TI__Mastermind 19545 points

Did you find a solution to this?

LPRF Rocks the World

0 Xiaoming Lan over 12 years ago in reply to Morten Braathen

Prodigy 125 points

Not yet, this problem is not appear frequently, restart iPhone will be okay.

0 Morten Braathen over 12 years ago in reply to Xiaoming Lan

TI__Mastermind 19545 points

How often does this happen?
Do you see this when WiFi is present?

LPRF Rocks the World

0 tylerw over 12 years ago in reply to Morten Braathen

Intellectual 555 points

I have seen this problem - you can also get around it by turning off/on the bluetooth subsystem.

The sniffer shows that during a connection parameter update, the connInstant provided by the iphone is in the past.

0 Xiaoming Lan over 12 years ago in reply to Morten Braathen

Prodigy 125 points

Once in a while,

WiFi is present.

0 Xiaoming Lan over 12 years ago in reply to tylerw

Prodigy 125 points

Tylerw,I think what you said is reasonable, I have update the connection parameters in the program.

How did you solve this problem?

0 Aslak N. over 12 years ago in reply to Xiaoming Lan

TI__Mastermind 23440 points

Hi,

If you try to wait a bit before sending the update request (5 sec for example) does it then work better?

Best regards,
Aslak

0 Morten Braathen over 12 years ago in reply to Aslak N.

TI__Mastermind 19545 points

Is there any issue with the Channel Map updatefor CC254x (when using Apple guidelines for connection interval) like with CC256x?

Please also see the following thread:

INSTANT_PASSED with CC256x

LPRF Rocks the World

0 tylerw over 12 years ago in reply to Morten Braathen

Intellectual 555 points

Xiaoming,

I have not been able to solve the problem yet - it has a very low rate of occurrence. I have not observed it since updating to iOS 6.1.0, and it was reported on the apple bluetooth-dev mail list that it may have been fixed then. Your account of the issue on iOS 6.1 gives me less confidence in that though!

Aslak,

I use a characteristic to wait for the iPhone to finish service discovery before requesting the connection parameter update from the peripheral. This method seems to work well and mitigates the issue with connection drop from connection parameter update during service discovery.

LPRF Rocks The World,

I don't think this one is related to the channel map update, my sniffer captures never show it getting to the point where a channel map update would occur. It is good to know that a chan map update issue exists though! Here is the line that causes the disconnect from my sniffer capture (the connInstant for the updated parameters to take affect is highlighted in red, the current event counter is highlighted in yellow - you can clearly see that the connInstant is in the past):

Frame,Access Address,Event Counter,Side,Control Pkt,connInstant,length,delta,timestamp

685 0x50655320 0x0076 1 LL_CONNECTION_UPDATE_REQ 0x0071 27 00:00:03.509752 2/22/2013 12:31:08.207936 PM

-Tyler

0 Aslak N. over 12 years ago in reply to tylerw

TI__Mastermind 23440 points

Hi tylerw,

I couldn't see any mention of stack version, so I would like you to download the latest 1.3.1 stack and see if the problem persists. Release notes are available in a sticky post on this forum.

Best regards,
Aslak

Bluetooth®︎

Bluetooth forum

LL_STATUS_ERROR:instant passed