sleep mode in nrf51822

RE: sleep mode in nrf51822

rushin — Tue, 12 Jan 2016 13:20:24 GMT

can you tell me that why my LED is not becoming ON??

RE: sleep mode in nrf51822

Marco Russi — Tue, 12 Jan 2016 10:16:53 GMT

My proposed solution allows you to start again advertising after 10 s so the device will never stop to advertise. It doesn't go in sleep mode. Indeed as far as I know the device can not go in sleep mode and advertise at the same time.

RE: sleep mode in nrf51822

rushin — Mon, 11 Jan 2016 18:28:37 GMT

i can't understand solution. i want to make it in sleep mode and then advertise again

RE: sleep mode in nrf51822

rushin — Mon, 11 Jan 2016 18:23:49 GMT

but after my advertising stops. my LED does not becom on

RE: sleep mode in nrf51822

rushin — Mon, 11 Jan 2016 18:20:27 GMT

...

static void on_ble_evt(ble_evt_t * p_ble_evt)
{
    uint32_t                         err_code;
    
    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
            APP_ERROR_CHECK(err_code);
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
            break;
            
        case BLE_GAP_EVT_DISCONNECTED:
            err_code = bsp_indication_set(BSP_INDICATE_IDLE);
            APP_ERROR_CHECK(err_code);
            m_conn_handle = BLE_CONN_HANDLE_INVALID;
            break;

        case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
            // Pairing not supported
            err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTS_EVT_SYS_ATTR_MISSING:
            // No system attributes have been stored.
            err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
            APP_ERROR_CHECK(err_code);
            break;
				case BLE_GAP_EVT_TIMEOUT:
					//printf("rushin");
				LEDS_ON(BSP_LED_1_MASK);
				 break;
        default:
            // No implementation needed.
            break;
    }
}

RE: sleep mode in nrf51822

Marco Russi — Mon, 11 Jan 2016 16:19:34 GMT

Hi, just add advertising start function call on idle event. See here below:

/* Function for handling advertising events. This function will be called for advertising events which are passed to the application */ static void on_adv_evt(ble_adv_evt_t ble_adv_evt) { ret_code_t err_code;

switch (ble_adv_evt)
{
    case BLE_ADV_EVT_FAST:
	{
    	/* do nothing */
        break;
	}
    case BLE_ADV_EVT_IDLE:
	{
		/* start advertising again */
		err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
        APP_ERROR_CHECK(err_code);
        break;
	}
    default:
        break;
}

}

Feel free to have a look at my code repo on github for a full application example:

github.com/.../nrf51_led_dimmer

Regards.

RE: sleep mode in nrf51822

Stefan Birnir Sverrisson — Mon, 11 Jan 2016 15:53:04 GMT

As pointed out in previous answer, you can start advertising with calling advertising_start(), as done in i.e. ble_app_bps in nRF51 SDK 10.0.0

To stop advertising, you can call sd_ble_gap_adv_stop() function.

If you want to enter System Off low power mode, you can call sleep_mode_enter, as done in the ble_app_bps example. When in System Off low power mode, you can only wake up the chip by pin interrupt (when SENSE enabled), reset, or ANADETECT signal on low power comparator. The device will reset when waking up from System Off mode.

If you want to enter System On low power mode, you should call sd_app_evt_wait(). Any interrupt will wake up the CPU from system on low power mode. All nRF51 peripherals are enabled in System On low power mode.

Update 13.1.2016 I have updated a modified ble_app_bps example from nRF51 SDK 10.0.0. When BLE event is either BLE_GAP_EVT_DISCONNECTED or BLE_GAP_EVT_TIMEOUT a timer is started which will expire in 10 seconds and then restart advertising. To find the code that is changed/added from the original example, look for "by Nordic" in the main file.

ble_app_bps_with_periodic_advertising.zip

The advertising timeout is set to 10 seconds. When advertising starts again after timeout, it will be in slow advertising mode (like the default ble_app_bps example) which shows no LED activity on the PCA10028 board. However, if you connect to the board and then disconnect, you will see the board will start advertising again and the LED starts to blink after 10 seconds.

RE: sleep mode in nrf51822

rushin — Sun, 10 Jan 2016 05:03:58 GMT

can we use power_manage() to stop advertising??

RE: sleep mode in nrf51822

rushin — Sun, 10 Jan 2016 05:02:31 GMT

advertising stops after 10 sec.then device restart advertising after 20 second. i want to do this continuously. when advertising stops, i want nrf51822 in low power mode

RE: sleep mode in nrf51822

monpetit — Sun, 10 Jan 2016 04:24:29 GMT

You did not say the restart condition. When does your device restart advertising?

RE: sleep mode in nrf51822

rushin — Sat, 09 Jan 2016 18:38:21 GMT

APP_ADV_TIMEOUT_IN_SECONDS is 10 second. once advertisement starts then i want to put it in sleep mode after 10 second then i want to make it advertise again. how it is possible. my one problem is aalso that if i don't define advertisement time out, power_manage() function don't stop advertising

RE: sleep mode in nrf51822

rushin — Sat, 09 Jan 2016 18:34:21 GMT

int main(void) { uint32_t err_code; bool erase_bonds; uint8_t start_string[] = START_STRING;

    // Initialize.
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
    uart_init();
    buttons_leds_init(&erase_bonds);
    ble_stack_init();
    gap_params_init();
    services_init();
    advertising_init();
    conn_params_init();
    
    printf("%s",start_string);

    err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);
    
    // Enter main loop.
    for (;;)
    {
        power_manage();
    }

}

RE: sleep mode in nrf51822

rushin — Sat, 09 Jan 2016 18:31:56 GMT

my function is like that

static void advertising_init(void)
{
    uint32_t      err_code;
    ble_advdata_t advdata;
    ble_advdata_t scanrsp;

// Build advertising data struct to pass into @ref ble_advertising_init.
memset(&advdata, 0, sizeof(advdata));
advdata.name_type          = BLE_ADVDATA_FULL_NAME;
advdata.include_appearance = false;
advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

memset(&scanrsp, 0, sizeof(scanrsp));
scanrsp.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
scanrsp.uuids_complete.p_uuids  = m_adv_uuids;

ble_adv_modes_config_t options = {0};
options.ble_adv_fast_enabled  = BLE_ADV_FAST_ENABLED;
options.ble_adv_fast_interval = APP_ADV_INTERVAL;
options.ble_adv_fast_timeout  = APP_ADV_TIMEOUT_IN_SECONDS;

err_code = ble_advertising_init(&advdata, &scanrsp, &options, on_adv_evt, NULL);
APP_ERROR_CHECK(err_code);

}

RE: sleep mode in nrf51822

aep — Sat, 09 Jan 2016 17:07:17 GMT

You can at any time call sd_ble_gap_adv_start again to restart advertisement. (in advertising_start() in most of the examples)