IOS exception disconnect after 90s when change ble connection interval on NRF52810

RE: IOS exception disconnect after 90s when change ble connection interval on NRF52810

Joakim Jakobsen — Thu, 22 Aug 2019 09:03:54 GMT

[quote user="Ian715"]so what version should I follow?[/quote]

I suggest that you follow the guidelines in the latest version of the Accessory Design Guidelines.

From the Accessory Design Guildelines for Apple Devices (Release R9):
The connection parameter request may be rejected if it does not comply with all of these rules:

● Slave Latency ≤30
● 2 seconds ≤ connSupervisionTimeout ≤ 6 seconds
● Interval Min modulo 15 ms == 0
● Interval Min ≥15 ms
● One of the following:
● Interval Min + 15 ms ≤ Interval Max
● Interval Min == Interval Max == 15 ms
● Interval Max * (Slave Latency + 1) ≤ 2 seconds
● Interval Max * (Slave Latency + 1) * 3 < connSupervisionTimeout

Best regards,
Joakim

RE: IOS exception disconnect after 90s when change ble connection interval on NRF52810

Ian715 — Mon, 19 Aug 2019 09:24:56 GMT

in other answers given in the forum (like this and this), the following interpretation is taken:

Interval Max * (Slave Latency + 1) ≤ 2 seconds
Interval Min ≥ 20 ms
Interval Min + 20 ms ≤ Interval Max
Slave Latency ≤ 4
connSupervisionTimeout ≤ 6 seconds
Interval Max * (Slave Latency + 1) * 3 < connSupervisionTimeout

what is the correct interpretation? and, what rules should I follow?

May be Apple develop guidlines has update, the newest version is Interval Min≥ 15 ms

so what version should I follow?

RE: IOS exception disconnect after 90s when change ble connection interval on NRF52810

Ian715 — Mon, 19 Aug 2019 07:11:53 GMT

We want to set connection interval param ensure connetion interval actually used is small for reduce latency. And it must works ok for IOS and Android. We set connection interval param to 10ms~20ms is work ok for using other ble IC on IOS, but disconnect on Nordic IC. So I think it is related to Nordic IC or sdk. And I seach key words"IOS diconnect Nordic 90 seconds" on google, Many other people has same problems.

RE: IOS exception disconnect after 90s when change ble connection interval on NRF52810

Ian715 — Mon, 19 Aug 2019 04:45:28 GMT

IOS report error code is 0, the error message is "Unknown". Many your customers have occured this problem. more detail can reference this link(https://forums.developer.apple.com/thread/90929), our problem is same to it.

RE: IOS exception disconnect after 90s when change ble connection interval on NRF52810

Joakim Jakobsen — Fri, 16 Aug 2019 12:54:31 GMT

Hi.

[quote user=""]but use all these param , connection will disconnect after about 90s for iOS.[/quote]

Did you check what the disconnect reason was when using these params?

Regards,
Joakim