RE: (BLE advertising) nRF automatically connect to my phone and prevent it from other device

Hung Bui — Mon, 07 Mar 2022 14:30:09 GMT

Hi Tam,

The most common way of adding such feature as you described is to use a whitelist.

When a device advertises in whitelist, it won't allow the connect request from the centrals that are outside of the whitelist.

So in your case if A and B is in the whitelist but not C and D then it would work exactly as you described.

Some of our examples (e.g ble_app_ancs_c, mouse, keyboard etc ) supporta whitelist by default. A device is automatically added to whitelist after it's bonded.

However, the difference here is that we defined a button (BSP_EVENT_WHITELIST_OFF) to turn off the whitelist. So if you want to add a new device to the whitelist, you need to press the button to allow "normal" advertising. This will make it possible for C and D to connect and join the whitelist.

We currently don't have the code to allow adding C and D via A and B. You would need to make your own mechanism to send the data about C and D from A/B down to the node and update the whitelist. The advertising module has an event that request the application to provide the whitelist , have a look here and please refer to the examples I mentioned above.
Your task is to find a way to send either address of C/D or their IRK to the node to update to the whitelist.