Tips on ULP, BLE and SoftDevice S110 with PCA10001 [nRF51822]

RE: Tips on ULP, BLE and SoftDevice S110 with PCA10001 [nRF51822]

Stefan Birnir Sverrisson — Tue, 25 Nov 2014 14:20:33 GMT

I think the ble_app_lbs is basically the template application with addition of a single service with 2x custom characteristics. Perhaps you just need to evaluate if you feel more comfortable with modifying the service in the ble_app_lbs example for your own purpose or to start from scratch from the ble_app_template , using the principles described in the nAN-36 and ble_app_lbs. In any case, you would need to add your LPCOMP and other functionality on top of that. Do you have PC10028 already, it requires SDK 7.0.1, see SDK release notes.

RE: Tips on ULP, BLE and SoftDevice S110 with PCA10001 [nRF51822]

Lucast85 — Mon, 24 Nov 2014 17:33:56 GMT

The code was updated recently and now it work also with SD 7.1 and SDK 6.0.0.43681.

RE: Tips on ULP, BLE and SoftDevice S110 with PCA10001 [nRF51822]

Lucast85 — Mon, 24 Nov 2014 17:30:33 GMT

I think to modify the code described in nAN-36 as follow:

delete the LED characteristic;
add LPCOMP functionality and measure speed with help of RTC and LFCLK;
modify the BUTTON characteristic replacing button status data with speed data computed at point "2";
update connection parameters programmatically (related with bicycle's speed);
Delete all extra functionality minimizing current consumption. It could work? Or it's better to start from the "template application" (example project for PCA10028)? Thank you!

RE: Tips on ULP, BLE and SoftDevice S110 with PCA10001 [nRF51822]

Stefan Birnir Sverrisson — Tue, 04 Nov 2014 07:55:51 GMT

The ble_app_lbs current version uses an older SDK and softdevice, as stated in the readme for the example on Github. So if you flash softdevice 6.0.0, and put the Github ble_app_lbs example into SDK 5.2.0, compile it and then flash it, it should work.

RE: Tips on ULP, BLE and SoftDevice S110 with PCA10001 [nRF51822]

Lucast85 — Mon, 03 Nov 2014 18:15:04 GMT

Thank you for fast response! I try to download last GitHub version of nrf51-ble-app-lbs into PCA10001 board but, with USB dongle and Master Control Panel, I cannot see any BLE device (see here). I think it's a "nrf51-ble-app-lbs" problem because the dongle and MCP works well with other BLE examples applications (e.g. ble_app_hrs). I use SoftDevice 7.1 and SDK v.6.0.0.43681. Are there any solution to nAN36 application or are there others app notes to quick jump to BLE world? Thank you again.

RE: Tips on ULP, BLE and SoftDevice S110 with PCA10001 [nRF51822]

Stefan Birnir Sverrisson — Fri, 31 Oct 2014 14:56:07 GMT

With your frame rate of 2Hz, you should be able to obtain very low current consumption.

Perhaps you will benefit of looking at this blog. There is also a current consumption guide here.

To create a proprietary profile, nAN-36 is a good starting point. It is perhaps a little outdated but the principles should be still valid. A more updated accompanied ble_app_lbs code is available on Nordic's Github page

Connection interval tips. Choose 500ms connection interval, and a slave latency of 7, to allow the device to respond to the central device in every 8th connection event if there is no data to send for 8*500ms. Supervision timeout of perhaps 5-10 seconds.