Stop advertising

RE: Stop advertising

Vasiliy Baryshnikov — Tue, 20 Aug 2019 01:08:07 GMT

In SDK 15, if you are using a template derived project, you should use the following statement with the parameter to stop advertising:

sd_ble_gap_adv_stop(m_advertising.adv_handle);

RE: Stop advertising

hrg — Wed, 20 Aug 2014 04:39:35 GMT

sorry for the way i posted the code nikitha ! i will try and reply asap.

RE: Stop advertising

Nikita — Tue, 19 Aug 2014 11:14:16 GMT

Post the code on pastebin.com or something, it's just a mess without formatting in comments. I see you calling app_timer_start and then immediately sd_ble_gap_adv_stop. It's wrong, you need to call sd_ble_gap_adv_stop in the timer timeout handler. app_timer_start function is just starting the timer and don't wait until the timer will expire.

RE: Stop advertising

hrg — Tue, 19 Aug 2014 05:59:13 GMT

The timer init is the default from the api. am using the battery timer for my use

int main(void) { // Initialize //leds_init(); timers_init(); gpiote_init(); buttons_init(); ble_stack_init(); bond_manager_init(); gap_params_init(); advertising_init(BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE); services_init(); conn_params_init(); sec_params_init();

// Start execution
advertising_start();

// Enter main loop

// nrf_delay_us(5000); app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL);

sd_ble_gap_adv_stop();
//system_off_mode_enter();

}

RE: Stop advertising

Nikita — Mon, 18 Aug 2014 14:52:25 GMT

I think you do something wrong with timer init. Show me the test code that you're using. Or just show timer init part, and parts where you start advertising, where you stop advertising and main loop.

RE: Stop advertising

hrg — Mon, 18 Aug 2014 10:23:52 GMT

hi I was capturing the current waveform through daQ .when i used apptimer_start() there is no advertising channels ..but when i used nrf_delay_us i can see the advertising channels clearly.but the problem is when i call sd_ble_gap_adv_stop the sleep current doesnt go to zero it forms a steady current of 4.3 mA. so i tried with system_off_mode_enter().And there is some sleep current of 4.3mA in between two advertisng events !

RE: Stop advertising

Nikita — Mon, 18 Aug 2014 10:17:01 GMT

Yes, I'm talking about app timer. How did you test that there was no advertising? You tried to receive them with central scanning for peripheral? Maybe central just missed this packets? Try to test your current consimption with oscilloscope and see if the advertising packets being sent.

RE: Stop advertising

hrg — Mon, 18 Aug 2014 08:40:48 GMT

I tried but with timer i couldnt get a single advertising event .(the timer yu mention is app_timer_start() rite??).when i tried with software delay the sleep current between each advertising is nearly 4 mA !!!!

RE: Stop advertising

Nikita — Mon, 18 Aug 2014 08:08:20 GMT

You mean 3 advertising events? How about to set timer for 3.5*(advertising interval), start timer after sd_ble_gap_adv_start and after the timer expires you call sd_ble_gap_adv_stop?

RE: Stop advertising

hrg — Mon, 18 Aug 2014 07:31:51 GMT

how to do three advertising and stop ?? i tried with loop iterations but its not working !!!

RE: Stop advertising

hrg — Thu, 14 Aug 2014 07:04:57 GMT

Got it !! Thankyou :) !

RE: Stop advertising

Nikita — Thu, 14 Aug 2014 06:37:49 GMT

In your case if you use nrf_delay_us(4000) the actual delay can be more then 4ms because nrf_delay_us() can be interrupted and interrupt handling may take a few more ms to your delay. But with timer it will be exactly 4ms because timer operation won't be interrupted. You can read this electronics.stackexchange.com/.../software-delay-vs-hardware-timers or google for more info.

RE: Stop advertising

hrg — Thu, 14 Aug 2014 04:31:26 GMT

Thankyu ! wats the difference in using delay_us & timers ?? which one is efficient & why ??

RE: Stop advertising

Nikita — Wed, 13 Aug 2014 15:23:45 GMT

You can do it with nrf_delay for test purpose.

RE: Stop advertising

hrg — Wed, 13 Aug 2014 14:30:49 GMT

Thankyou guys ! i tried with advertising start den some delay of 4 ms (using nrf_delay_us()) den power off (sleep ) !.now i can see the current waveform with one advertising ! now i have to try whether master control panel can detect my device or not !!

note: is it right using nrf_delay instead of setting a timer ????

RE: Stop advertising

Nikita — Wed, 13 Aug 2014 13:56:34 GMT

It will work only with advertising interval > 1 second because minimum advertising timeout value is 1 second.

RE: Stop advertising

John — Wed, 13 Aug 2014 13:52:30 GMT

Why not set the advertising timeout to a value less than your advertising interval. Then when the stack returns the BLE_GAP_EVT_TIMEOUT event with a source of BLE_GAP_TIMEOUT_SRC_ADVERTISEMENT you can then do your power off work.

It is possible that sd_ble_gap_adv_start may check to ensure that the timeout is longer than the interval and return an error in which case this won't work. Otherwise I think it is a simple solution.

RE: Stop advertising

Nikita — Wed, 13 Aug 2014 13:24:37 GMT

Don't know if it will work, but try this:

If first advertising event is generated with advertising interval delay after sd_ble_gap_adv_start call then try to call sd_ble_gap_adv_stop after calling sd_ble_gap_adv_start and waiting for 3/2*(advertising interval) with timer.
If first advertising event is generated right after sd_ble_gap_adv_start call ther wait for 1/2*(advertising interval) with timer and call sd_ble_gap_adv_stop.