RE: Combining BLE UART functionality into a Central+peripheral Relay example

kishor babu — Wed, 01 Aug 2018 06:28:19 GMT

Hi George,

I am also trying to implement the UART service which will act as both central and peripheral at a time.

So, I started including peripheral UART first into the central and peripheral relay example.

I am also facing the same issue like you, I dumped BLE_UART central example into one board and the modified relay example in another board, both are connected but not able to communicate with each other.

static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{
    uint16_t conn_handle;
    uint16_t role;

    ble_conn_state_on_ble_evt(p_ble_evt);
    pm_on_ble_evt(p_ble_evt);

    // The connection handle should really be retrievable for any event type.
   conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    role        = ble_conn_state_role(conn_handle);

    // Based on the role this device plays in the connection, dispatch to the right applications.
    if (role == BLE_GAP_ROLE_PERIPH)
    {
        // Manages peripheral LEDs.
        on_ble_peripheral_evt(p_ble_evt);

        ble_advertising_on_ble_evt(p_ble_evt);
        ble_conn_params_on_ble_evt(p_ble_evt);

        // Dispatch to peripheral applications.
        ble_nus_on_ble_evt (&m_nus, p_ble_evt);
			  bsp_btn_ble_on_ble_evt(p_ble_evt);
       // ble_rscs_on_ble_evt(&m_rscs, p_ble_evt);
    }
    else if ((role == BLE_GAP_ROLE_CENTRAL) || (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_REPORT))
    {
        /** on_ble_central_evt will update the connection handles, so we want to execute it
         * after dispatching to the central applications upon disconnection. */
        if (p_ble_evt->header.evt_id != BLE_GAP_EVT_DISCONNECTED)
        {
            on_ble_central_evt(p_ble_evt);
        }

        if (conn_handle < CENTRAL_LINK_COUNT + PERIPHERAL_LINK_COUNT)
        {
            ble_db_discovery_on_ble_evt(&m_ble_db_discovery[conn_handle], p_ble_evt);
        }
        ble_hrs_c_on_ble_evt(&m_ble_hrs_c, p_ble_evt);
       // ble_rscs_c_on_ble_evt(&m_ble_rsc_c, p_ble_evt);

        // If the peer disconnected, we update the connection handles last.
        if (p_ble_evt->header.evt_id == BLE_GAP_EVT_DISCONNECTED)
        {
            on_ble_central_evt(p_ble_evt);
        }
    }
}

The above is my ble_evt_dispatch function, could you suggest me what are the necessary changes and i need to make?

RE: Combining BLE UART functionality into a Central+peripheral Relay example

GeorgeM — Tue, 24 Jul 2018 23:51:59 GMT

I never get answers in this form. is it too difficult a question or something? am I a lost cause?

Anyways, I figured it out. to anyone curious, the difference between the two examples seems to be the ble_evt_dispatch function.

it splits the previous ble_evt_dispatch into two new modes depending on if its a peripheral connection or central connection.

In this case, my ble example code falls under the peripheral device category so any previous ble code would have to be funneled in the right mode.