Advertising interval from Slow to fast without init process

[Yaniv Reibenbach]

Hi,

I am implementing a beacon solution and intrested to move from fast to slow and vis versa(slow to fast) advertising modes - 

i.e. BLE_ADV_MODE_FAST & BLE_ADV_MODE_SLOW

This is a coincell powered device and the goal for these transitions is to save battery.

I am using nRF5_SDK_14.2.

In this SDK version is there a way to move from SLOW to Fast without running again advertising_init()?

Related post https://devzone.nordicsemi.com/f/nordic-q-a/19074/can-i-change-nrf5-bluetooth-advertising-interval-dynamically/73766#73766

[Martin Lesund]

Hi Yaniv,

Please take a look in the "Advertising Module documentation".

Usually you have advertising go from  Fast -> Slow -> Idle.

Do you only want to change from Fast -> Slow -> Fast -> Slow ? (aka. never enter sleep_mode?)

If so you could just add that when Slow_adv_timeout runs out you go back to fast_adv in the IDLE case:

 switch (ble_adv_evt)
    {
        case BLE_ADV_EVT_FAST:
            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
            APP_ERROR_CHECK(err_code);
						NRF_LOG_INFO("FAST ADVERTISING");
            break;
				
				case BLE_ADV_EVT_SLOW:
					err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_SLOW);
					APP_ERROR_CHECK(err_code);
					NRF_LOG_INFO("SLOW ADVERTISING");
				  break;
				
        case BLE_ADV_EVT_IDLE:
					  //NRF_LOG_INFO("IDLE");
            //sleep_mode_enter();
						err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
            APP_ERROR_CHECK(err_code);
						NRF_LOG_INFO("FAST ADVERTISING");
						
            break;
        default:
            break;
    }