how to change beacon data when push the button with Sleep mode?

[Dawaz]

[SDK 12.3.0 / nrf52 DK / Keil tool / beacon example code]

Hello. i am a novice developer.

1. Power On - Beacon data transmit and enter to sleep mode after 10 sec
2. Button_1 Push - Beacon data Change and transmit(after 10 Sec, go to sleep)
3. Button_2 Push - Beacon data Change and transmit(after 10 Sec, go to sleep)

I want to amke a this beacon system so add to this code.

void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action){
			advertising_stop();
			m_beacon_info[8] = 0x11; // random data
			advertising_init();
			advertising_start();  }

this code is working but i added the code for enter to sleep mode on main() and it did not work.

for (;; )
{
 __WFE();
        __SEV();
        __WFE();
      //  power_manage();
}

plz give the answer. and what is the problem?

thanks.

[endnode]

Go back to beacon example and don't change content of main infinite loop (once you use Nordic BLE stack you cannot use things like WFE, you should call respective Soft Device function to wait for event/interrupt). Secondly you don't need to stop advertising, you can change data through calling of SD API functions a any time. See example code here.

[Dawaz]

i using multiple beacon device(maximum 45) inside 10m. i worried about data collision(like a packet drop) from smart phone that is why i try to stop beacon advertising(and little bit save the power). It is not neccesary?

[endnode]

I'm talking about your in_pin_handler function where you do stop/init/start which isn't necessary.

[Jørgen Holmefjord]

The code you have put in main loop will put the chip in system on sleep mode. In this sleep mode, any event will wake the chip. This will not stop the advertising or turn off any timers. This mode is used while the device is advertising/connected etc. As @endnode mention, you should use the softdevice API when the softdevice is enabled. If you want to go to deep sleep mode, where you will need external trigger like button press to wake the chip, this is called system off mode. If you disable the softdevice, you can enter this mode by setting the register NRF_POWER->SYSTEMOFF = 1;, or using the softdevice API sd_power_system_off