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Dynamic Scan Response Data

KRITHIGA MOHAN GEETHA
Intellectual 550 points

Hi ,

I need to change the Scan Response Data dynamically.

Device Name characteristic in the Generic Access Service is enabled to write using,

uint8 devNamePermission = GATT_PERMIT_READ | GATT_PERMIT_WRITE;
GGS_SetParameter( GGS_W_PERMIT_DEVICE_NAME_ATT, sizeof ( uint8 ), &devNamePermission );

Is it possible to see the value written in attDeviceName into scanRspData of SimpleBlePeripheral ?

I am using TI BLE stack v2.1.1

Thanks in advance !

  • 0
    TI__Guru** 105180 points
    Hello,

    Scan Response data and GAP Device Name Characteristic are not related, thus updating one doesn't update the other. You will need to update both independently using their respective APIs / procedures. For Scan Response, use GAPRole_SetParameter(GAPROLE_SCAN_RSP_DATA, xxx);

    Best wishes
  • 0 in reply to JXS
    Intellectual 550 points

    Hi JXS,

    Thank you for the reply.

    I agree to it.

    So, when the device name is changed, ie. when ggs_WriteAttrCB() is called, scanRspData should also be updated by using GAPRole_SetParameter(GAPROLE_SCAN_RSP_DATA, xxx);


    Is my approach right ?

    If so, how to do it ?

    Thanks and Regards.

  • 0 in reply to KRITHIGA MOHAN GEETHA
    Intellectual 550 points

    Hi,

    Kindly reply to the above query.


    Thanks in Advance !

  • 0 in reply to KRITHIGA MOHAN GEETHA
    TI__Guru** 105180 points

    Yes, did you try and what are the results?

    You can follow the example for setting GAPROLE_SCAN_RSP_DATA in the SimpleBLEPeripheral sample application.

    Best wishes

  • 0 in reply to JXS
    Intellectual 550 points

    Hi JXS,

    Thank you for the reply.

    In ggs_WriteAttrCB() of gapgattserver.c , I added the following, in the case DEVICE_NAME_UUID.

              VOID osal_memcpy(&scanRspData[2],pValue, GAP_DEVICE_NAME_LEN);
              GAPRole_SetParameter(GAPROLE_SCAN_RSP_DATA, sizeof(scanRspData), scanRspData);

    And added this file for compilation.

    But I was not able to see the update in scan response data.

    In tried to do same in SimpleBLEPeripheral sample application. But this file(gapgattserver.c) is not present as part of the build process.

    ie., I am not sure if I am doing the change for scan response data with modified device name at the right place.

    Kindly guide me on this.

    Thanks and Regards.

  • 0 in reply to KRITHIGA MOHAN GEETHA
    TI__Guru** 105180 points
    Yes, gapgattserver.c is part of the library, hence it is not part of the build.

    I suggest making the call in the SimpleBLEPeripheral.c file (application task context).

    Best wishes