iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

run_ar — Wed, 18 May 2016 13:21:49 GMT

Yes, changing the Softdevice_handler_init ppm value is what I have been discussing to. The crystal should be left at the same value,as we want to have more margins for the peer clock. Another option would be to use the rc osc as this uses a window of 250ppm but has a lot of margin. Please consider creating a new question, where you explain your problem, so we can be sure you have the same iop issues as described in this case.

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

Nallo — Wed, 18 May 2016 10:40:53 GMT

Thanks for your reply, I am going to make some tests in the next days. In addition, I think I have to tweak the first parameter of the SOFTDEVICE_HANDLER_INIT() accordingly with the PPM value of the crystal. Am I right?

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

run_ar — Wed, 18 May 2016 10:30:36 GMT

By Higher PPM value I mean going from e.g. 20-30 ppm to 150 - 250 ppm. The point is to increase the size of the listening window.

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

Nallo — Tue, 17 May 2016 12:16:50 GMT

Hello run_ar, cloud you please explain more exhaustibly what you mean with higher ppm value for their 32kHz? Given a PPM of 20, if I am going to choose a higher PPM than 20, does that mean a PPM of 10 or a PPM 25, 30 and so on? Thanks a lot.

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

Eliot Stock — Tue, 13 Oct 2015 12:14:12 GMT

Thanks. We'll do the same, as discussed.

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

run_ar — Tue, 13 Oct 2015 12:12:28 GMT

Looks like the clock source on the idevice is less accurate than stated in the connection request. This causes the peripheral to lose the connection anchor. Because of issues like this some customer has chosen to use a higher ppm value for their 32kHz source than necessary to compensate.

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

Eliot Stock — Wed, 16 Sep 2015 14:16:26 GMT

Thanks, that does look relevant. I'll turn on the device manager logging and see what I can see. Will also test with iOS 9.0 in the next few days and see if that changes anything.

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

BLEdude — Wed, 16 Sep 2015 14:04:04 GMT

I see! I had something similar to me happen recently as I just began playing around with bonding. This note may be of interest of you. LMP Collision

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

Eliot Stock — Wed, 16 Sep 2015 14:02:26 GMT

Yes. I have the mobile apps read an encrypted characteristic right after they connect in order to force bonding to happen.

RE: iOS 8 disconnection: Code=6 "The connection has timed out unexpectedly."

BLEdude — Wed, 16 Sep 2015 13:44:41 GMT

Does your peripheral bond with your iOS device?