sd_power_system_on() not available in nrf5 SDK15.3.0

[Yogeshwaran]

I am working in nrf52840 sleep mode and it is working perfectly in system_off() mode, but while trying to wakeup from sleep using timer the device is not waking up because CPU made off using system_off() function. Basically i want my device will go to sleep and wake up using software interrupt(timers) and advertise then go to sleep. But in ble_app_uart example present in SDK 15.3.0 has sleep_mode_enter() function which has system_off(), and i could not able to run any timer(CPU off) in sleep, so i looked in other SDK examples there were sd_power_system_on() function which i could not able to find in SDK 15.3.0 documentation.

can you tell me how to make CPU on(sd_power_system_on()) in ble_app_uart example and how to implement interrupt to wakeup nrf by using timers?

[Jørgen Holmefjord]

Hi,

You can enter system ON mode by calling softdevice function sd_app_evt_wait().

Best regards,
Jørgen

[Yogeshwaran]

Thank you sd_app_evt_wait() was working and app timer running background will trigger the timer handler then i could see advertising data, but power consumption was 0.92 mA when there is no advertisement. I am measuring using multimeter with USB powered. If i use 3 v power supply ext with VEXT ON, power switch on, multimeter connected and nrfswitch is on but i could not see any board led turning On.

What could be the issue and how to reduce power?