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MCV.1
Associate II
April 22, 2021
Question

Ble Receiving Junk data

  • April 22, 2021
  • 3 replies
  • 1582 views

hi all

i am using blenrg2 m2sp chip as network mode. its operating as peripheral device and communicating with host controller through UART with 115200 baud rate .

I received BLE read characteristic request , i did not response till 1 second after that i getting some junk data , after that ble got disconnected . may know the reason . here attached logic analyzer images

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    3 replies

    Winfred LU
    ST Employee
    April 27, 2021

    What would be the slave latency?

    In case that the latency is OFF, the slave (BlueNRG-2) needs to respond within the connection event interval.

    What would be the supervision timeout?

    The link may be disconnected due to not receiving anything in supervision timeout period.

    MCV.1
    MCV.1Author
    Associate II
    May 27, 2021

    hi Winfred , sorry for delay replay , i am not fell well , during this time , i will check this and i will update on this , i need your support on this

    MCV.1
    MCV.1Author
    Associate II
    May 27, 2021

    hi winfred

    slave latency =0

    Conn_Interval=9216

    Supervision_Timeout=-3071

    but Supervision_Timeout showing negative value , in order to come aviod this i used below api

    aci_l2cap_connection_parameter_update_req();

    but still showing same response , can you suggest any other options for this .