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Studio Bluetooth

PICH_4397076
New Contributor

Dear All,,,

I am going to develop our application with Cypress's Dual Mode BT Chipset CYW20706.

Our application runs as a peripheral (Server / Slave),

and after connection we need to update the connection parameters.

I looked for a related example after wiced studio installation, but couldn't find it.
Please let me know if there are any code examples I can refer to.

Thanks,

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1 Solution
AnjanaM_61
Moderator
Moderator

Hi,

For updating Connection parameters, you just need to use the below API in your application after connection_up : wiced_bt_l2cap_update_ble_conn_params  ( Check wiced_bt_l2c.h file )

Example:

    uint16_t min_int = 400; /* Minimum connection interval - 400 x 1.25 = 500 ms */

    uint16_t max_int = 400; /* Maximum connection interval - 400 x 1.25 = 500 ms */

    uint16_t latency = 0;   /* Slave latency */

    uint16_t timeout = 500; /* Supervision timeout - 500 x 10 = 5000 ms */

result = wiced_bt_l2cap_update_ble_conn_params (hello_sensor_state.remote_addr,  min_int,  max_int,  latency,  timeout);

Thanks,

Anjana

View solution in original post

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3 Replies
AnjanaM_61
Moderator
Moderator

Hi,

For updating Connection parameters, you just need to use the below API in your application after connection_up : wiced_bt_l2cap_update_ble_conn_params  ( Check wiced_bt_l2c.h file )

Example:

    uint16_t min_int = 400; /* Minimum connection interval - 400 x 1.25 = 500 ms */

    uint16_t max_int = 400; /* Maximum connection interval - 400 x 1.25 = 500 ms */

    uint16_t latency = 0;   /* Slave latency */

    uint16_t timeout = 500; /* Supervision timeout - 500 x 10 = 5000 ms */

result = wiced_bt_l2cap_update_ble_conn_params (hello_sensor_state.remote_addr,  min_int,  max_int,  latency,  timeout);

Thanks,

Anjana

View solution in original post

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PICH_4397076
New Contributor

Dear All,,,

Thanks for your inform.

I have one more question.

When the slave sends the update connection parameter request to the master,

it tries to display on the console screen whether the master has accepted or rejected the request.
I want to put this part of my code in the slave-side additionally, what should I do?
Also, after requesting the connection parameter update,

I want to display the connection interval value determined

after the master accepts or rejects it on the console screen.

Thanks,

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AnjanaM_61
Moderator
Moderator

Hi,

You will get that info in BT stack event BTM_BLE_CONNECTION_PARAM_UPDATE

Example Usage:

wiced_result_t hello_sensor_management_cback( wiced_bt_management_evt_t event, wiced_bt_management_evt_data_t *p_event_data )

{

  

    switch( event )

    {

/* Bluetooth  stack enabled */

    case BTM_ENABLED_EVT:

             break;

:

:

case BTM_BLE_CONNECTION_PARAM_UPDATE:

        p_ble_conn_param_update = &p_event_data->ble_connection_param_update;

        WICED_BT_TRACE ("BTM BLE Connection Update event status:%d interval:%d latency:%d lsto:%d\n",

                            p_ble_conn_param_update->status,

                            p_ble_conn_param_update->conn_interval,

                            p_ble_conn_param_update->conn_latency,

                            p_ble_conn_param_update->supervision_timeout);

        break;

:

:

}

}

Thanks,

Anjana

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