tuning connection parameters to minimal current consumption

RE: tuning connection parameters to minimal current consumption

Stefan Birnir Sverrisson — Fri, 03 Oct 2014 07:00:59 GMT

Hi Tim. Thank you for your feedback. I will try to add material to the thread soon to address the things that you have mentioned. Please accept my answer if you think it is adequate.

RE: tuning connection parameters to minimal current consumption

tim — Wed, 01 Oct 2014 16:56:29 GMT

thank you for updating the thread. That thread "How to minimize current consumption for BLE application"

Should be an FAQ.

I see some issues with current consumption are related to nrf51 device version. Points to add may include;

How to reduce power by NOT floating nrf51 pins and careful attention to pin sense wakeup which will be interrupts.

And other issues are related to hardware issues such as interrupt settings.

Again thx,

RE: tuning connection parameters to minimal current consumption

Stefan Birnir Sverrisson — Wed, 01 Oct 2014 06:51:58 GMT

Hi Tim Thank you for clarifying your question.

RE: tuning connection parameters to minimal current consumption

Stefan Birnir Sverrisson — Wed, 01 Oct 2014 06:51:36 GMT

I think this thread will give explanation for what parameters have effect on current consumption. Look specifically at the "Tuning connection parameters" and "Tuning advertising parameters" sections.

RE: tuning connection parameters to minimal current consumption

tim — Tue, 30 Sep 2014 16:50:40 GMT

Thank you for your response. I see did not clearly state my goal was to minimize current consumption for maximum battery life.

RE: tuning connection parameters to minimal current consumption

Stefan Birnir Sverrisson — Tue, 30 Sep 2014 06:51:12 GMT

I am not entirely sure I understand your question.

To select advertising timeout of 60 seconds, i.e. when advertising should stop, you set

#define APP_ADV_TIMEOUT_IN_SECONDS      60

like you have done in your code. Set this parameter to 0 in order to disable timeout.

If the device is however in non-connectable mode, the advertising timeout is 30 seconds as defined with

#define APP_CFG_NON_CONN_ADV_TIMEOUT  30

To set the advertising interval to X milliseconds, set

#define APP_ADV_INTERVAL    MSEC_TO_UNITS(X, UNIT_0_625_MS)