Putting bl654 in sleep mode

[dkj047]

Hi all

How to put BL654 in deep sleep mode and standby doze mode using nordic nrf52840 ?? Also how to turn the system off?? 

Thanks 

[Simonr]

Hi

Depending on whether you're using the SoftDevice or not, there are a few ways to do this.

No SoftDevice:

• System ON mode. You can create a power manage function, consisting of __WFE(); __SEV(); __WFE();.
• System OFF mode. You can call NRF_POWER->SYSTEMOFF = 1;

SoftDevice enabled:

• System ON mode. Call sd_app_evt_wait();
• System OFF mode. Call sd_power_system_off();

Best regards,

Simon

[dkj047]

Hi thanks 

The soft device is enabled. I'm trying to use sd_app_evt_wait(); but the current consumption is 1.7 mA which is too high for sleep/doze mode. What could be the reason for this?  I have not configured any gpio and i am using following code. 

main()

{

while(1)

{

 sd_app_evt_wait();

}

}

These are some  of the module enabled in sdk

BLE DB DISCOVERY ENABLED
NRF BLE GATT ENABLED
NRF BLE QWR ENABLED
NRF BLE SCAN ENABLED
PM CENTRAL ENABLED
PM SERVICE CHANGE ENABLED
PM PEER RANKS ENABLED
NRF CRYPTO ENABLED
GPIOTE ENABLED
NRFX CLOCK ENABLED
NRFX GPIOTE ENABLED
NRFX PRS ENABLED
NRFX PWM ENABLED
NRFX PWM0 ENABLED
NRFX PWM1 ENABLED
NRFX RTC ENABLED
NRFX SPIM ENABLED
NRFX SPI ENABLED
NRFX SPI0 ENABLED
NRFX SPI1 ENABLED
NRFX TIMER ENABLED
NRFX TWI ENABLED
NRFX TWI0 ENABLED
NRFX UARTE ENABLED
NRFX CLOCK ENABLED
NRFX PPI ENABLED
NRFX PWM ENABLED
PWM0 ENABLED
RTC ENABLED
RTC2 ENABLED
SPI ENABLED
SPI1 ENABLED
SPI USE EASY DMA
SPI2 ENABLED
TIMER ENABLED
TIMER0 ENABLED
TIMER1 ENABLED
TWI ENABLED
TWI0 ENABLED
TWI0 USE EASY DMA
UART ENABLED
UART0 ENABLED
APP PWM ENABLED
APP SCHEDULER ENABLED
APP TIMER ENABLED