bjornspockeli / custom_ble_service_example Goto Github PK

Hi We are using the nordic sdk 1.9.1.
I have created my own project and i want whole sdk commit to my repo. I am able to build the project.I am not able to commit the mcuboot, It showing the error you are not able to commit the git repository under another git repository.

1. If i remove .git folder in the sdk then we are able to commit but nothing got committed in the mcuboot folder .I am not able to build the project.
2. I have tried to create the mcuboot as repository which contain the same file which mcuboot repo having and add as the submodule to my repo still am facing the build issue

can you please explain by removing the .git folder we are facing the build issue. What is the role of .git folder of mcuboot for the successfully building of the project.

Is there is any way to commit the whole nordic sdk.

Hello,

I am using 14.1.0 SDK, I implemented the custom service and characteristic, but if adding CCCD(Client Characteristic Configuration Descriptor) with the custom value characteristic, the system will be reset after pushing cccd button in app, I can't know the reason,

when checking the issue point, the issue is happened with sd_ble_gatts_hvx function,

please help me the method to solve issue,
My email is [email protected]

thankful for your support and kindness in advance

Question : Should I change memory as to ram ?
currently start is 0x20002a68 and size is 0x2000ffff, how can I change it ? please..help me...

thanks

Awesome tutorial, but it seems to be a bit outdated for what SDK 14 requires.

after sometime this application going to sleep mode. May I know why?
If we want to continuous advertisement . which place we need to be correct ?

how to pass the float values to on_write function of ble_app_template when we give input from nrf app connect using ble in segger emmbedded studio

Hello,
First of all, congratulations on the guide, it is very well done.
How can I now insert another characteristic on the same service?
Thank

For a newbie, this erroneous byte swap was a little confusing:

In the text, it says this is the UUID that was used:
f364adc9-b000-4042-ba50-05ca45bf8abc

But all the code and screenshots are written with this UUID (two erroneous byte swaps):
f364adc9-00b0-4240-ba50-05ca45bf8abc

It was very confusing to me, as it was kind of a pain figuring out how the byte-ordering is supposed to work. I made a python3 script for this, if anyone is interested:

https://gist.github.com/kbrafford/b517289bdbbd2102b1e23bc3c7aa841e

In the main README, in step 4 right at the beginning it says to declare custom_value_char_add in the header file. It won't compile (at least using GCC) if you follow this step, and this step is also not in the final ble_cus.h file.

Hello @bjornspockeli,

thanks for this great example!
Can you please add a custom User Description to the characteristic. I had it working on SDK 14, though after migration to Version 15, I can't get it work. Please help.

Thanks
Sebastian

this example is nice but it needs to show how to add more services with notification and more characteristics. It should also show how to integrate from BDS because i assume it is based on it also

Hi: I followed your excellent tutorial and am running into this issue.
I followed through the thread posted by someone that had the same issue and apparently solved it by relocating where, in ble_cus_init() he was initializing the event struct.

This doesn't appear to be my problem. I set a breakpoint on the first line of on_connect() and when I step through, I notice that the second line (ble_cus_evt_t evt) isn't executing. Furthermore, I cannot set a breakpoint on this line as I get a "no code for breakpoint" warning.

As you probably guessed by now, I am very new to the nRF world so am just now getting familiar with everything. I encountered a similar problem while stepping through another example and I discovered that I needed to include and enable some items in sdk_config.h before the associated code would compile else that code gets ignored.

Am I missing something in the configuration for this project? The project I am modifying is ble_app_template.

ble_cus_evt_handler_t evt_handler; is missing in STEP2

Are there any examples of how to create a central that can connect to this custom service? I need to make a pair of devices, one that will be the custom peripheral and one that will be a custom central to talk to each other. I have not been able to find an example for a central that connects to a custom service.

I did find some comments about modifying the UART example, but that example still seems to use some of the "built in" nRF files for the UART.

I wanted to send an array of uint8_t so I made the following changes in the ble_cus_custom_value_update() function. I changed it to :
code
I changed the function parameter of custom_value to a pointer so that I can pass the array and changed the gatts_value.len to the size of the array. The gatts_value.len is where the problem occurs. If I don't change it and keep it as sizeof(unit8_t); then it works fine but I only receive the first byte of the array on the Central. When I changed the gatts_value.len to the size of the array I get the error as "NRF_ERROR_DATA_SIZE" and the microcontroller hangs. I'm using nrf52832 dk and sdk15. I'll attach the error output below for better understanding :
image

APP_ERROR_CHECK(err_code);

should be replaced by

if ((err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}

Hey, so far your code has been beyond helpful getting familiar with this technology. However, I seem to be getting a problem propagating custom service events to the application. Specifically when I call p_cus->evt_handler(p_cus, &evt); within on_connect(). When I comment out that specific line of code the app is able to connect to the ble app on my android phone and I can communicate through the softdevice. Though, when I do include it, the app tries to connect but then fails. Do you have an idea as to why this might be the case? I am using a nRF52840 chip.

Hello Bjorn,
Thanks for this useful tutorial.
We are working on an application with motion control based on nRF52840 (S140).
I have implemented your example / tutorial and modified the RAM start 0x20002220 and the size to 0xDDE0 however I am still getting the FATAL ERROR message related to the memory allocation.
Any thoughts about that?
Thanks,
Elias

Sadly i did not fork the project, so no direct linkage here..
see: https://github.com/maidenone/custom_ble_service_example

Hello,

I am using 14.1.0 SDK, I implemented the custom service and characteristic, but if adding CCCD(Client Characteristic Configuration Descriptor) with the custom value characteristic, the system will be reset, I can't know the reason,

when checking the issue point, the issue is happened with sd_ble_gatts_hvx function,

please help me the method to solve issue,
My email is [email protected]

thankful for your support and kindness in advance

Question : Should I change memory as to ram ?
currently start is 0x20002a68 and size is 0x2000ffff, how can I change it ? please..help me...

thanks

As written, the walkthrough does not work. At the end of Step 3 you should be able to connect to the peripheral, but I wasn't able to. The missing steps appear to be the addition of QWR Queued Write Module. After adding the QWR logic to my services_init method I'm able to connect to the peripheral.

Thanks for the great walkthrough!

Hey i just wanted to say thank you for your great tutorial!
The step by step explanations are perfect for including a custom service in an existing project.
Without this repo it would take several days for me (still beginner) and now i am ready after a few hours and know exactly where to tweak things.

Great work @bjornspockeli !

By using the notifications characteristics/service i can upload only data from 00 to ff.I want to upload data from 00 to 64000 atleast. i tried changing the data type from uint_8 to uint_32 but it does not work

Hi, first of all, I would like to say that you have helped me a lot with your tutorial. Thank you for your excellent work.

But, how can I add more than one custom service?
I do these things:

• Create a new Custom Service
• Add new Characteristics
• Add the new CUSTOM_SERV_UUID to advertising array in main.c
• Set NRF_SDH_BLE_VS_UUID_COUNT to 2 inside the sdk_config.h
• Initialize service.

But when I try to run, my application stops to do advertising.

I think I have two possible errors:
1 - I need to set the RAM_START and RAM_SIZE values.
2 - When I created my new service, I put this in an advertising package and this made it exceed the allowed 31-byte value of advertising.

Ps: My second custom service doesn't need to advertise. So, if I can remove from advertising and see those values when my peer is connected, I could do this, by I don't know how to do.

Could you help me to solve this issue?