Re: Default connection interval
Re: Default connection interval
- Subject: Re: Default connection interval
- From: Mark Palatucci <email@hidden>
- Date: Mon, 10 Dec 2012 15:41:02 -0800
Hi Etan,
I believe the iOS 5.0 default was 105ms - but if you send a change parameter request with min=20ms, max=40ms (the lowest range that conforms to the apple guidelines), then you get 37.5ms. Technically, if you violate the guidelines, you can get the phone to go as low as 18.75ms under iOS 5.
Under iOS 6 - the default connection interval is 30ms vs. 105ms. I do not believe this is ever changed after the fact as I print this value in my radio firmware, and have never seen anything over 30ms. The way we've written our firmware, we only request a connection parameter change if the interval goes above 40ms.
I have tried advertising packets that contain the preferred parameters, but I do not believe they make any difference.
-Mark
On Mon, Dec 10, 2012 at 3:27 PM, Etan Kissling
<email@hidden> wrote:
Mark,
30ms seems strange as 38.75 ms was the interval that was used when choosing the fastest connection parameters
that were still under the Apple Bluetooth Accessory Guidelines under iOS 5.
Have you encountered 30ms only during discovery (followed by a connection parameter update to slower parameters)
or is it 30ms for the whole time?
Have you set preferred connection parameters in your advertising data? Although the Bluetooth Accessory Guidelines
claim that these are not checked, it may still interfere and produce smaller connection intervals.
Etan
wrote:
The default under iOS 6 is much faster than iOS 5. It is 30ms under iOS 6. As a result, discovering services and characteristics is ~3x faster.
On Mon, Dec 3, 2012 at 2:00 AM, Etan Kissling
<email@hidden> wrote:
ing your question:
- iOS 5 -- 105.00ms
- iOS 6 -- untest
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