regarding BLE_APP_MULTILINK_CENTRAL_PCA10040_s132

[s_sen]

so i am trying to understand the code , and i would be really grateful if u help me . 

what i am trying to do is send data from one DK to multiple DK. i am not able to figure out where to send the data or read it from.  

SDK1 uploaded with  multilink_central and SDK2 is uploaded with ble_app_blinky (it works fine )

thank you 

ps- we are using SEGGER IDE , SDK BMD 300.

[Bjørn Kvaale]

Which sdk version are you currently using? v15.1? Have you taken a look at the documentation provided here?

[s_sen]

thank you for your reply

v15.0 and yes i have gone throught he infocentre, but its still a bit blurry.....

i just need to know what exactly is the data being transmitted (the frame configuration) ...

[Bjørn Kvaale]

Take a look at the button_event_handler() function in main.c of the multilink example. As soon as the user presses button 1, the led_status_send_to_all() function gets called:

static ret_code_t led_status_send_to_all(uint8_t button_action)
{
    ret_code_t err_code;

    for (uint32_t i = 0; i< NRF_SDH_BLE_CENTRAL_LINK_COUNT; i++)
    {
        err_code = ble_lbs_led_status_send(&m_lbs_c[i], button_action);
        if (err_code != NRF_SUCCESS &&
            err_code != BLE_ERROR_INVALID_CONN_HANDLE &&
            err_code != NRF_ERROR_INVALID_STATE)
        {
            return err_code;
        }
    }
        return NRF_SUCCESS;

This function will iterate through all of the central links & call ble_lbs_led_status_send(), which will write the led status to the peripheral link. There are 8 button client instances that are created in the multilink central example (i.e. m_lbs_c). The sd_ble_gattc_write performs the write procedure inside the tx_buffer_process() at the end of ble_lbs_led_status_send(). See the ble_gattc.h header file for more information. Hope that helps!

[s_sen]

thank you , that helped sir