nRF Connect SDK Bluetooth Low Energy tutorial part 1: Custom Service in Peripheral role

RE: nRF Connect SDK Bluetooth Low Energy tutorial part 1: Custom Service in Peripheral role

user54890 — Fri, 13 May 2022 19:12:16 GMT

Thanks for the tutorial! Really needed it to get going. In the example code, where you show:
[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:a11585ca-7404-462e-8711-5c3937a5a9e7:type=c_cpp&text=%2F%2A%20%0D%0A%20%20%20%20The%20attribute%20for%20the%20TX%20characteristic%20is%20used%20with%20bt_gatt_is_subscribed%20%0D%0A%20%20%20%20to%20check%20whether%20notification%20has%20been%20enabled%20by%20the%20peer%20or%20not.%0D%0A%20%20%20%20Attribute%20table%3A%200%20%3D%20Service%2C%201%20%3D%20Primary%20service%2C%202%20%3D%20RX%2C%203%20%3D%20TX%2C%204%20%3D%20CCC.%0D%0A%2A%2F]

This confused me when looking at some other examples, like zephyr\samples\bluetooth\peripheral_csc. In that case, they have 1 service, 4 characteristics, and 2 CCCs. However, when they refer to the 4th attribute using csc_svc.attrs[8], that made no sense according to your numbering scheme. I dug in a bit further and discovered how it actually works. Hopefully this can be corrected. Thanks!

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:75bf044a-1426-4f58-aec1-ba87d1e8e406:type=text&text=%2F%2A%20%0D%0A%20%20%20%20The%20attribute%20for%20the%20TX%20characteristic%20is%20used%20with%20bt_gatt_is_subscribed%20%0D%0A%20%20%20%20to%20check%20whether%20notification%20has%20been%20enabled%20by%20the%20peer%20or%20not.%0D%0A%20%20%20%20Attribute%20table%3A%200%20%3D%20Primary%20service%2C%201%20%3D%20RX%20properties%2C%202%20%3D%20RX%20descriptor%2C%20%0D%0A%20%20%20%203%20%3D%20TX%20properties%2C%204%20%3D%20TX%20descriptor%2C%205%20%3D%20CCC.%0D%0A%2A%2F]

RE: nRF Connect SDK Bluetooth Low Energy tutorial part 1: Custom Service in Peripheral role

user112667 — Fri, 14 Jan 2022 01:47:50 GMT

Thanks for the great tutorial! NCS looks really great and I love the new syntax.
I'm looking for a tutorial fills in some of the details for NCS that are included in this tutorial for nRF5 https://github.com/NordicPlayground/nRF5x-custom-ble-service-tutorial but I haven't found them yet.
Are there perchance any NCS tutorials covering these more in-depth topics?

RE: nRF Connect SDK Bluetooth Low Energy tutorial part 1: Custom Service in Peripheral role

user108959 — Wed, 15 Dec 2021 13:00:47 GMT

Hi, where are the following declarations used? I have the feeling that they are left from somewhere else.

from my_service.c:

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:6133dedc-1763-4e76-bcbe-813d3e288ea0:type=text&text=%23define%20MAX_TRANSMIT_SIZE%20240%0D%0Auint8_t%20data_rx%5BMAX_TRANSMIT_SIZE%5D%3B%0D%0Auint8_t%20data_tx%5BMAX_TRANSMIT_SIZE%5D%3B%0D%0A%0D%0Amemset%28%26data_rx%2C%200%2C%20MAX_TRANSMIT_SIZE%29%3B%0D%0Amemset%28%26data_tx%2C%200%2C%20MAX_TRANSMIT_SIZE%29%3B%0D%0A]

from my_service.h:

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:2d5e40dd-1654-497f-b02b-176e26885445:type=text&text=%2F%2A%2A%20%40brief%20Callback%20type%20for%20when%20new%20data%20is%20received.%20%2A%2F%0D%0Atypedef%20void%20%28%2Adata_rx_cb_t%29%28uint8_t%20%2Adata%2C%20uint8_t%20length%29%3B%0D%0A%0D%0A%2F%2A%2A%20%40brief%20Callback%20struct%20used%20by%20the%20my_service%20Service.%20%2A%2F%0D%0Astruct%20my_service_cb%20%0D%0A%7B%0D%0A%09%2F%2A%2A%20Data%20received%20callback.%20%2A%2F%0D%0A%09data_rx_cb_t%20%20%20%20data_rx_cb%3B%0D%0A%7D%3B%0D%0A]

It's just that everything works without them, and I don't see anything changing.

RE: nRF Connect SDK Bluetooth Low Energy tutorial part 1: Custom Service in Peripheral role

user108771 — Wed, 10 Nov 2021 03:45:56 GMT

Hi, thanks for the tutorial. There seems to be an issue with the advertising sequence.

I get this error: Advertising failed to start (err -11) in the terminal. This error code is for "No more contexts", but I do not understand what this means and I have not seen this error anywhere else on the forum.

RE: nRF Connect SDK Bluetooth Low Energy tutorial part 1: Custom Service in Peripheral role

user106788 — Thu, 02 Sep 2021 14:43:08 GMT

Thanks for the tutorial haakonsh, was wondering if you know about performing a DFU with this application. Currently having issues