Connection Parameters using nRF Dongle vs iOS

RE: Connection Parameters using nRF Dongle vs iOS

Joakim Jakobsen — Tue, 02 Jun 2020 22:11:59 GMT

Hi.

Sorry about the delayed response.

Since it is the central that actually decides the connection parameters in a BLE connection, the phone will decide the connection interval. I don't believe that neither Android or iOS devices provides any API or any other way to change this. What the peripheral can do is to request other connection intervals, but the central can decide whether to accept it or reject it.

The only thing the peripheral can do then is to disconnect (or accept the given connection interval).

Br,
Joakim

RE: Connection Parameters using nRF Dongle vs iOS

BattleDroid — Wed, 13 May 2020 15:06:24 GMT

Could you please elaborate on your responses? I don't have enough detail to take action on my end.

Re Q1. How do you determine the connection parameters the iPhone is using? Is there a menu in the mobile app that lets you see and/or modify these parameters? Furthermore, how do you modify these in the nRF Connect PC app?

Re Q2. The BLE specification is a rather large document. Without diving into the entire document, is a there a section you can point me to with this information?

RE: Connection Parameters using nRF Dongle vs iOS

Joakim Jakobsen — Wed, 13 May 2020 10:17:33 GMT

Hi.

Q1:
It might be because the iPhone decides the connection parameters, thus increasing the power consumption if it changes.

In that case you need to figure out what connection params the iPhone enforces and then use that when with nRF Connect.

Q2:
The limitations of the connection parameters on our part is decided by the Softdevice. The limitations can be found in the documentation.
For general limitations for BLE, you can find that in the BT SIG - BLE Specification. I suggest that you take a look there.

Best regards,
Joakim