Unable to connect to specific Android devices (Samsung S21, and more)

RE: Unable to connect to specific Android devices (Samsung S21, and more)

Hung Bui — Mon, 06 Jan 2025 10:14:00 GMT

Hi Aurelien,

If it rarely happen, it's most likely just interference ? If the peripheral couldn't catch the Connect request (due to packet corruption) it will result in what showed in the trace.
Let us know if you find a way to reproduce the issue.

RE: Unable to connect to specific Android devices (Samsung S21, and more)

fr_adv — Mon, 06 Jan 2025 07:27:26 GMT

Dear Hung Bui,

Thank you for your answer. Unfortunately this bug has very little occurence and is hard to catch.

Other boards did reproduce this issue, and on some other phones as well (Redmi Note 8 for instance) but for example it never occurs with iPhones.

We have no whitelist implemented.

I'll try to provide you another feedback if we manage to reproduce it.

Best regards,

Aurélien

RE: Unable to connect to specific Android devices (Samsung S21, and more)

Hung Bui — Mon, 23 Dec 2024 15:32:25 GMT

Hi Aurelien,
What I can see in the trace is that the peripheral didn't receive or didn't response to the connect request from the phone:

The phone continued to send (and resend) a packet 6 times before give up and the connection was considered terminated.

The ticket you pointed to didn't go to the root cause of the issue so we don't know what exactly caused it and if it's the same issue as yours.

Do you have any Filter Accept List (whitelist) implemented on the nRF52 ?

Could you try to do a full erase (chiperase) of the chip and then flash a simple BLE application (peripheral_lbs for example) and test again ?

Could you try to test with other boards ? and with other phones ?