device current consumption during advertising

RE: device current consumption during advertising

ovrebekk — Fri, 17 Apr 2020 07:21:48 GMT

I'm happy to help Gil. The best of luck with your project 🙂

Torbjørn

RE: device current consumption during advertising

Gil — Thu, 16 Apr 2020 17:02:06 GMT

Thank you very much for your answer,

Gil

RE: device current consumption during advertising

ovrebekk — Thu, 16 Apr 2020 09:13:45 GMT

Hi Gil

Yes, the idle_state_handle() function called repeatedly in the main loop will in turn call the nrf_pwr_mgmt_run() function, which puts the CPU to sleep whenever there are no events to process or any log data to print.

Best regards
Torbjørn

RE: device current consumption during advertising

Gil — Tue, 14 Apr 2020 16:48:33 GMT

I see. Thanks for your answer.

So, does the ble_app_hrs_pca10056_s140 SDK demo project i am running actually sends the CPU to sleep between advertise packets?

RE: device current consumption during advertising

ovrebekk — Tue, 14 Apr 2020 13:21:43 GMT

Hi Gil

[quote user=""]I understood that while APP_ADV_DURATION is set to 0 the MCU device never goes to sleep. [/quote]

This is not totally correct. With the APP_ADV_DURATION set to 0 the advertising will continue forever, but the MCU will still go to sleep in between advertising events.

[quote user=""][/quote]

I got a "total average current" of about 50uA.

My question is: does this number include the device being awake all the time?

No. When the CPU is running it draws around 3-4mA, so in order to get 50uA average current you need to go to sleep in between advertise packets. Each advertise event takes a millisecond or two, so with an advertising interval of 300ms you can go to sleep for most of the time.

Best regards
Torbjørn