low current value in sleep_mode_enter ()

[alex kim]

Hi,

I am using 

• Custom Board(nRF52840)
• SDK 15.3.0
• Keil IDE
• The soft device is S140 
• JLinkRTTViewer for debug

My board has two leds and two buttons for door open / close.
When entering the System Off mode using the sleep_mode_enter () function, the current consumption varies between 11uA and 34uA.
I know that current consumption is less than 1uA when in System Off mode.
Please advise.

Alex





    

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        main-qna.txt
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int main(void)
{
    // Initialize.
	gpio_led_init();
    power_management_init();
    ble_stack_init();
    gap_params_init();
    gatt_init();
    services_init();
    conn_params_init();

	sleep_mode_enter();
}

[Stian Røed Hafskjold]

Hello, you need to debug the application. Start the debugger and check the return values for all functions. Set breakpoints in main to see how far it goes before it resets.

[alex kim]

Hi,

The cause of the reset is due to missing timers_init ().

Added timers_init (), so conn_params_init () run successfully.

The way to wakeup from systemoff is " devzone.nordicsemi.com/.../173257 " referenced.

Current consumption ranges from 0.1uA to 0.2uA in SystemOff mode.

Thank you for your kind reply.

Best regards,

Alex