button_event_handler not triggering when not connected

[wim]

Hi

I started form the lbs example to build my application. I have now the following problem: apparently the button_event_handler is only triggered when the device is connected over bluetooth. However, I would like it to trigger also when bluetooth is not connected, to count events on the button input. How do I do that?

[Stefan Birnir Sverrisson]

Hi

In the ble_app_lbs, you enable the app_button user when you connect. When the device connects you get a callback from the softdevice which is received in the on_ble_evt callback function in main.c. There you have the code :

    case BLE_GAP_EVT_CONNECTED:
        nrf_gpio_pin_set(CONNECTED_LED_PIN_NO);
        nrf_gpio_pin_clear(ADVERTISING_LED_PIN_NO);
        m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;

        err_code = app_button_enable();
        APP_ERROR_CHECK(err_code);
        break;

So if you call app_button_enable in the main function instead before you enter the main loop, then the button should be enabled all the time.

[Stefan Birnir Sverrisson]

It was just the functionality of the ble_app_lbs to enable the button when connected because it first makes sense to use the button when we can transmit the button data over the BLE link.

For the SPI driver, I think you only need to call spi_master_init and then you can send/receive data with calling spi_send_recv, just as is done in the SPI example in the SDK.