nfr51 sleep mode and reconnect example

RE: nfr51 sleep mode and reconnect example

garypty — Tue, 22 Nov 2016 09:08:42 GMT

Thank you. I just follow the tutorial and stopped at the "Preparations" section, but did not realized that there are actually more steps needed to prepare at the lower part. Suggest to add hints in the "Preparations" section that we need to include these paths.

RE: nfr51 sleep mode and reconnect example

Jørgen Holmefjord — Tue, 22 Nov 2016 07:26:09 GMT

Those errors are due to that the files nrf_drv_clock.c and app_timer.c have not been added to the project. You need to perform the steps described in the section "Add required files and includes" in the tutorial.

RE: nfr51 sleep mode and reconnect example

garypty — Tue, 22 Nov 2016 07:17:38 GMT

Yes, because I can build all other examples in SDK11 and SDK12 successfully. And the step for this example is rather straight forwards. I just downloaded this example, and then extract it under "\examples\peripheral, and then open Keil5, then open this example project in Keil5, then click . Please see the errors here

RE: nfr51 sleep mode and reconnect example

Jørgen Holmefjord — Tue, 22 Nov 2016 06:34:58 GMT

And you extracted it into examples\peripherals folder of SDK 11? Did you make sure you followed every step of the tutorial? What other errors did you encounter?

RE: nfr51 sleep mode and reconnect example

garypty — Tue, 22 Nov 2016 01:53:23 GMT

The project I downloaded in this tutorial:Application Timer Tutorial

RE: nfr51 sleep mode and reconnect example

Jørgen Holmefjord — Mon, 21 Nov 2016 14:52:44 GMT

Which smaple project did you download?

RE: nfr51 sleep mode and reconnect example

garypty — Mon, 21 Nov 2016 14:13:02 GMT

Found another 6 errors when added these Include Paths. I downloaded this sample project and extracted to "\examples\peripheral", I just think the Include Paths should be correct.

RE: nfr51 sleep mode and reconnect example

Jørgen Holmefjord — Mon, 21 Nov 2016 13:59:12 GMT

Did you remember to add the include path to the project?

Now go to Project -> Options for target ... -> C/C++. 
From there, add the following directories to the Include Paths:

..\..\..\..\..\components\drivers_nrf\clock
..\..\..\..\..\components\libraries\timer
..\..\..\..\..\components\drivers_nrf\delay

RE: nfr51 sleep mode and reconnect example

garypty — Mon, 21 Nov 2016 13:49:10 GMT

I tested the Application Timer Tutorial with keil5, SDK11, however I cannot build it successfully. The error message says it cannot find "app_timer.h", which is included in the main.c

RE: nfr51 sleep mode and reconnect example

Jørgen Holmefjord — Mon, 21 Nov 2016 13:40:09 GMT

Yes, power_manage() calls the softdevice API function sd_app_evt_wait(), which will put the device in system on sleep mode. The Online Power Profiler use the ble_app_pwr_profiling example from the SDK, which also use this method to put the device into system on sleep mode between advertising or connection intervals.

RE: nfr51 sleep mode and reconnect example

garypty — Mon, 21 Nov 2016 13:14:56 GMT

Is that means when the SDK example call the power_manage(), it enters the System On sleep mode already? I have visit this sile: Online Power Profiler, the current consumption in IDLE time is assumed to be 2uA, is it also a System ON sleep mode? Thank you.

RE: nfr51 sleep mode and reconnect example

Jørgen Holmefjord — Mon, 21 Nov 2016 10:15:26 GMT

Hi,

In general there are two sleep modes in the nRF51-series; system on and system off mode. See chapter 12.1.5-12.1.7 in the nRF51 Reference Manual for more details about the two sleep modes.

Most of the examples in our SDK use sleep functions, by calling the function power_manage() in a loop within the main function. I would recommend that you have a look at this thread about minimize current consumption for BLE application on nRF51822. I would also recommend that you have a look at the Application Timer tutorial if you want to configure your device to wake up regularly to transmitt data.

Read the answer in this thread about keeping connection during sleep mode.

Best regards,

Jørgen