Bluetooth Advertising messes up after a few days of no power

[SohamGhugare]

Hello Team,

We have noticed a very weird issue with the nRF5340 Audio DK. After flashing the audio application code given by nordic, everything works perfectly fine. No build errors or flash errors. However if the board is left unattended or unpowered for a few days (2-3 days), the bluetooth advertising messes up completely. On checking the logs, it shows directed advertisement has been timed out, switching to normal advertisement. This is instantly fixed if we just re-flash the firmware. Here's the details of the SDK and toolchain.

Toolchain Version: 3.0.1

SDK Version: 3.0.1

We have tried this on all the nRF5340 Audio DK's we have and all of them face the same issue. How can this be fixed?

[SwRa]

Hi Soham,

After testing, we see that the device is using direct-ADV for a tiny while after boot up and then it switched to use normal ADV. So it seems to be the normal behavior.

The headset will use intense direct ADV for a very short time after disconnected from the gateway. This is used for recovering from disconnection rapidly. And then it switches to normal advertising. This is the expected behaviour.

Regards,

Swathy