sd_power_system_on() not available in nrf5 SDK15.3.0

RE: sd_power_system_on() not available in nrf5 SDK15.3.0

Jørgen Holmefjord — Tue, 23 Apr 2019 15:20:40 GMT

If you set VEXT to ON and SW6 to "nRF ONLY", only nRF should consume current. Note that all LEDs on the DK are powered from VDD, and will not turn on when "nRF ONLY" is set.

Have you disabled UART in the ble_app_uart example? It could be that UART is enabled in RX mode, which will increase current.

RE: sd_power_system_on() not available in nrf5 SDK15.3.0

Yogeshwaran — Tue, 23 Apr 2019 09:33:42 GMT

i am using ble app uart example and adv timeout was 10 sec after that i am calling sd_app_evt_wait() so timer i set for 20 sec. approx 10 sec device is in idle mode and i want to measure current in this period. My doubt was how can i disconnect interface Mcu power and only make nrf run alone

RE: sd_power_system_on() not available in nrf5 SDK15.3.0

Jørgen Holmefjord — Tue, 23 Apr 2019 08:54:07 GMT

Which example do you run? Are you sure that your multimeter are able to follow and measure the quickly switching current consumption?

I would recommend getting a Power Profiler Kit for accurate current measurements.

RE: sd_power_system_on() not available in nrf5 SDK15.3.0

Yogeshwaran — Tue, 23 Apr 2019 08:45:16 GMT

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?

RE: sd_power_system_on() not available in nrf5 SDK15.3.0

Jørgen Holmefjord — Tue, 23 Apr 2019 08:37:16 GMT

Hi,

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

Best regards,
Jørgen