How to set the Bluetooth connection interval via mobile apps

RE: How to set the Bluetooth connection interval via mobile apps

Olaf — Tue, 01 Mar 2022 05:24:32 GMT

You can't set it for central role apps. You could try to make your peripheral supporting HID profile. https://developer.apple.com/library/archive/qa/qa1931/_index.html

Note: If Bluetooth Low Energy HID is one of the connected services of an accessory, connection interval down to 11.25 ms may be accepted by the Apple product.

Only if the app is acting as a peripheral you can select from 3 values like in Android.

https://developer.apple.com/documentation/corebluetooth/cbperipheralmanager/1393277-setdesiredconnectionlatency

RE: How to set the Bluetooth connection interval via mobile apps

Matthew K — Tue, 01 Mar 2022 01:12:23 GMT

Thank you Olaf!

Just to be clear, you mean iPhone mobile apps cannot set the connection interval, right?

RE: How to set the Bluetooth connection interval via mobile apps

Olaf — Sun, 27 Feb 2022 19:32:31 GMT

Hi,

for iOS take a look at https://developer.apple.com/hardwaredrivers/BluetoothDesignGuidelines.pdf

Chapter 40.6 Connection Parameters:

The accessory is responsible for the connection parameters used for the Low Energy connection. The accessory should request connection parameters appropriate for its use case by sending an L2CAP Connection Parameter Update Request at the appropriate time. See the Bluetooth 4.0 specification, Volume 3, Part A, Section 4.20 for details.

For Android you could have a look at:

https://stackoverflow.com/questions/21398766/android-ble-connection-time-interval

Answer 3:

Since Android Lollipop API level 21 you can use: requestConnectionPriority() With 3 levels: CONNECTION_PRIORITY_BALANCED, CONNECTION_PRIORITY_HIGH or CONNECTION_PRIORITY_LOW_POWER.

But as you see in the Apple document, the peripheral is the right place to change connection interval parameter.

Olaf