low power in advertising

[Marco Pennacchietti]

I'm using ble_app_uart example.

The board go in low power mode, but after 3 minutes (#define APP_ADV_DURATION  18000  ) go OFF. I need that remain in advertsing mode always.

Only with a bluetooth connection my board must resume and go in IDLE mode.

Is possible ?

Marco

[Vidar Berg]

Hi Marco,

You can disable advertisement timeout by setting APP_ADV_DURATION to 0 and use the BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE flag in advertising_init(). 

[Marco Pennacchietti]

Thanks,

in the main loop:

      

    for (;;)
    {
        nrf_gpio_pin_clear(OUT_COMP);
        nrf_delay_ms(2);
        
          idle_state_handle();
        
        nrf_gpio_pin_set(OUT_COMP);
        nrf_delay_ms(2);
    }

I have insert this code to test the difference when the device is connect or not.

When not connected I expected to see the port change at every interval time but there is no difference between CONNECTED or NOT CONNECTED.

the routine  idle_state_handle(); always takes 0.5 seconds.

The  idle_state_handle(); work only in relese mode ?

Marco

[Vidar Berg]

The application is not going to receive any events if you only advertise so the application is going to stay in the idle_state_handle() until you receive a connection event,etc. 

[Marco Pennacchietti]

when the application go in idle_state_handle(); is in low power ?

I measure 1,9 mA.

From your power management power example (https://devzone.nordicsemi.com/power/) with

3V, 1280 mS of advertising time, 31 bytes of payload and 0 dBm I'm aspected 13 uA.

#define APP_ADV_INTERVAL                1280

The time 0,5 sec related with idle_state_handle() seem not connected with 1,28 sec of my advertising time.

If an event arrive after 0,5 secod from last advertisment I'm aspected that the micro remain il low power and after 1,28 sec check the external event.

Marco

[Vidar Berg]

That could be the UART peripheral. As a test, try to not initialize/enable UART in your code. 

The advertisement events will run in the "background". That is, the softdevice will not wake the application for every advertisement event.