Change advertising interval via central app for both connectable & non-connectable modes – nRF52

[RohitSalavi]

I am working on an nRF52-based BLE peripheral (beacon) using the Nordic SDK. I want to implement functionality where the advertising interval can be updated dynamically from a central (mobile) app.

The beacon operates in two modes:

1. Non-connectable advertising (default)

2. Connectable advertising (activated by a button press)

My goal is to:

• Allow the central app to send a new advertising interval value to the beacon.

• Store the new interval in flash so it persists across reboots.

• Apply the updated interval to both advertising modes (connectable and non-connectable).

• Automatically switch back to non-connectable mode 5 seconds after a disconnect from central (mobile) app.

Questions:

1. What is the recommended approach to change the advertising interval dynamically from the central app?

2. How can I make sure the updated interval is applied to both advertising modes (connectable and non-connectable)?

3. Are there any limitations in applying different advertising intervals to connectable vs non-connectable advertising in the SDK?

4. Can I safely restart advertising with the new advertising interval without affecting ongoing BLE operations?

Any code examples or references to SDK functions would be greatly appreciated.

[Menon]

Hello,

I recommend going through the Bluetooth Academy course, as it provides a good starting point. Please make sure to complete the exercises. If you get stuck, feel confused, or need more clarity on any topic, feel free to raise your queries here, I'm always happy to help.

Kind regards,
Abhijith