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CC2642R: CC2642 Host does not send packets

wangrenli
Intellectual 600 points
Part Number: CC2642R
Other Parts Discussed in Thread: SYSCONFIG

Hi,

Why does the host not send packets for about 120ms on first connection。

sdk version：simplelink_cc13xx_cc26xx_sdk_7_10_01_24

Master and slave are both CC2642

8816.LOG.rar

  • 0
    TI__Mastermind 34070 points

    Hi,

    Thank you for reaching out. Can you share the example that you are using? Does this behavior occur with every connection you try to form? Could you also share your connection parameters?

    Best Regards,

    Jan

  • 0 in reply to Jan
    Intellectual 600 points

    Hi,

    The project used is multi_role, and the problem only occurs when binding pairs. After successful pairing, connecting again does not result in the

    The connection parameters can be found in the attachment LOG

  • 0 in reply to wangrenli
    TI__Mastermind 34070 points

    Hi,

    As a quick test, could you disable the "Send Parameter Update Request" option in SysConfig and retesting if the behavior is seen:

    Is the multi_role project, the peripheral or the central in the connection?

    Best Regards,

    Jan

  • 0 in reply to Jan
    Intellectual 600 points

    Hi,

    The result is the same.

    This is the multi_role project

  • 0 in reply to wangrenli
    TI__Mastermind 34070 points

    Hi,

    Got it. Thank you for testing this! Upon taking a closer look at the provided logs, it seems that the delay is occuring between the LLCP Feature Exchange finishing and the Data Length update starting. The 

    This delay is fairly typical in BLE connection establishments, below I have a screenshot of a log i took as a part of a previous debugging effort and a similar delay can be seen:

    After the connection is established, a connection parameter request may be send to reduce the time between connection events by modifying the connection interval parameter.

    Best Regards,

    Jan

  • 0 in reply to Jan
    Intellectual 600 points

    Hi,

    My current connection interval is already 7.5ms, do you think this delay is normal is it? , as it only occurs on the first bind pairing.

  • 0 in reply to wangrenli
    TI__Mastermind 34070 points

    Hi,

    I believe it is normal. Looking through a few logs I have taken for other experiments, I do see similar delays around that time.

    Best Regards,

    Jan