Sleep mode power consumption

RE: Sleep mode power consumption

fgeldenh — Mon, 17 Sep 2018 02:38:02 GMT

Edvin - The reason why the board did not go to sleep was due to the incorrect board. With the correct board set, it works fine.

RE: Sleep mode power consumption

Edvin — Fri, 14 Sep 2018 12:19:25 GMT

As I mentioned, if you use the unmodified nrf_pwr_profiling_pca10040 with a different board (using custom_board.h) with the number of buttons defined less than 2, then it will automatically go into advertising, and not sleep. This is done in the main() function.

What I did in the hex file that I sent you was to remove everything that has to do with buttons, so that it will go into sleep no matter what.

I see that we were speaking of two different examples, though. I was referring to examples\ble_peripheral\ble_app_pwr_profiling, and you meant the examples\peripheral\nrf_pwr_mgmt_pca10040.

There is a lot of button setup in this example. It might be that you get an assert if you don't have as many button defines in that example. From your logs, it doesn't look like the custom board is actually going to sleep. Try to do some debugging, and see if you can figure out why.

BR,

Edvin

BR,

Edvin

RE: Sleep mode power consumption

fgeldenh — Fri, 14 Sep 2018 09:28:16 GMT

Edvin - OK I admit that I have not read all the Nordic documentation. (There is a lot!). I have established that my issues are all related to the board configuration. If I set up a correctly formed custom_board.h, then all my issues clear up.

Thank you for your assistance

RE: Sleep mode power consumption

Edvin — Fri, 14 Sep 2018 09:19:52 GMT

Did you try the .hex file that I attached in the previous post?

BR,

Edvin

RE: Sleep mode power consumption

fgeldenh — Fri, 14 Sep 2018 04:22:13 GMT

I my have not attached the filesdevzone.nordicsemi.com/.../Images.zip

RE: Sleep mode power consumption

fgeldenh — Fri, 14 Sep 2018 04:20:21 GMT

Edvin - Thank you for your prompt response.

I am using the very simple peripheral (nrf_pwr_mgmt_pca10040) sample code. I attach two files, the one is using ublox EVK-NINA-B1 kit which is pretty similar to the nRF52 DK, and the other is my custom board.

These files depict the output from the sample code. In the case of Ublox it works as expected whilst my board does not shut down. I sent the schematic so you can look and see why there may be different behaviour.

The Ublox kit has a built in Segger debugger while in my case I am using the Segger J-Link debugger.

Maybe you can help me find out what the difference may be.

Thank You

RE: Sleep mode power consumption

Edvin — Thu, 13 Sep 2018 13:25:33 GMT

Hello,

You mean the example ble_app_pwr_profiling, from SDK\examples\ble_peripheral\ble_app_pwr_profiling, right?

This example, if not modified, will start advertising if the number of buttons is less than or equal to 2:

#if BUTTONS_NUMBER > 2

...

#else

m_is_notification_mode = true

#endif

I compiled a version that does nothing but going to system off.

devzone.nordicsemi.com/.../nrf52832.hex

Can you please try to program the attached .hex file? It is a merge of the application and the softdevice, so you don't have to program the softdevice first. If you use nrfjprog, you can just type:

nrfjprog -e

nrfjprog --program nrf52832.hex

nrfjprog --reset

And the application should start. Connect the PPK, and do some measurements, and see if the PCB still draws a lot of current.

Best regards,

Edvin