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CC2652R: Scanning becomes unresponsive when connection is terminated

Cetri_ex
Intellectual 770 points
Part Number: CC2652R

If I keep scanning enabled when there is a connection, there will be no more GAP_EVT_ADV_REPORT when the connection is terminated.

To reproduce the issue, please follow the procedure below:

1. Enable scanning with duration 0(indefinite) on device A.
2. Make a connection from device A to device B. Don't disable scanning.
3. Check if device A application is still getting GAP_EVT_ADV_REPORT.
4. Turn off device B to terminate the connection by supervision timeout.
5. Check if device A application is still getting GAP_EVT_ADV_REPORT.

A simple workaround is to disable scanning and re-enable on device A. However, I'm afraid that there might be any side effect or more fundamental problem.

- Cetri

  • 0
    TI__Guru 57865 points
    Hi Cetri,
    Thanks for sharing the details, we will reproduce and investigate internally.
  • 0
    TI__Guru 56590 points
    Hello Cetri,
    I could reproduce this on simepl_central in simplelink_cc13x2_26x2_sdk_3_10_00_53. Interestingly after about 4 minutes or so after supervision timeout was reported (step 5.) the GAP_EVT_ADV_REPORT events was steadily reported again. Do you also observe this behavior?
  • 0 in reply to Eirik V
    Intellectual 770 points

    Hi Eirik,

    No I didn't wait that long. Can you please check the workaround of disabling/re-enabling right away is safe?

    - Cetri

  • 0 in reply to Cetri_ex
    TI__Guru 56590 points
    Hello Cetri,
    I have filed a bug ticket (ref. BLE_AGAMA-740) and will get back with a status update. To restart scan seems like a good solution.
  • 0 in reply to Eirik V
    Intellectual 770 points

    Eirik,

    Unfortunately the workaround doesn't always work. Did you get any feedback from the development team? Can you please let me know ASAP if there is any update? This is an urgent issue to us. Thanks.

    - Cetri

  • 0 in reply to Cetri_ex
    TI__Guru 56590 points

    Hello Cetri,
    How to you restart scan?
    Do you check the return code of GapScan_enable?
    Do you disable and then enable?

    I will discuss it this week with R&D.

    The issue is fixed for the next release targeted Q4 2019.

    The