which program to choose to advertise data over BLE ?

RE: which program to choose to advertise data over BLE ?

Edvin — Tue, 27 Oct 2020 14:19:21 GMT

Are you sure this shouldn't be a preprocessor definition in your project?

RE: which program to choose to advertise data over BLE ?

SKV — Tue, 27 Oct 2020 11:20:31 GMT

Hi,

I did not have any problem related to SOFTDEVICE_PRESENT.

Thank you

RE: which program to choose to advertise data over BLE ?

lunaa — Tue, 20 Oct 2020 02:15:39 GMT

Hi,

Hope you are still around.

I'm working on combining the examples of twi_master_with_twis_slave onto ble_app_beacon like you.

However, I struggle to enable SOFTDEVICE_PRESENT which was stated due to the sdk_config.h file as in https://devzone.nordicsemi.com/f/nordic-q-a/49955/softdevice_present.

Did you have this problem and how did you manage to solve it?

Thank you.

RE: which program to choose to advertise data over BLE ?

Nijat — Tue, 20 Mar 2018 03:47:42 GMT

I used sd_ble_gap_adv_data_set, but it returns error 7 which represent Invalid_PARAMS.

When we initAdv, it calls sd_ble_gap_adv_data_set, but the parameter p_data is an p_encoded_advdata.

So using directly sd_ble_gap_adv_data_set without encoding data returns Invalid_DATA, but if I put p_encoded_advdata as parameters inside, it returns Invalid_PARAMS.

What kind of structure of parameters ?

RE: which program to choose to advertise data over BLE ?

Edvin — Mon, 19 Mar 2018 11:34:01 GMT

You can't fit 64 (2*32) bytes into advertisements. It is too big, and violates the BLE specification.

BR,

Edvin

RE: which program to choose to advertise data over BLE ?

SKV — Mon, 19 Mar 2018 05:25:49 GMT

Thanks RK it works fine.

RE: which program to choose to advertise data over BLE ?

RK — Sun, 18 Mar 2018 04:04:58 GMT

no you don't need to stop advertising to change the adversing data. You can just call sd_ble_adv_data_set() and put the new adv data / scan data into the packet.

RE: which program to choose to advertise data over BLE ?

SKV — Sat, 17 Mar 2018 06:58:33 GMT

Hello Edvin,

The post says we can only fit in 27 bytes of payload data. My application requires 64 bytes of payload data how can we fit the data. Can you help me with it.

Thank you,

Vasanth

RE: which program to choose to advertise data over BLE ?

Edvin — Fri, 16 Mar 2018 13:34:07 GMT

Hello,

Some of the bytes has to be used used as headers, so you will not get 31 bytes of payload data.

Check out this blog post, as it explains the advertising in detail. The section on Scan response data would be particularly interesting for you.

Best regards,

Edvin

RE: which program to choose to advertise data over BLE ?

SKV — Fri, 16 Mar 2018 07:41:58 GMT

Hello Edvin,

Thanks for replying it was very helpful.As mentioned in the above we send more the 31 bytes of data by adding the scan response function .By adding this we can send 62 bytes of data(Each 31 bytes for advertisement and scan response).But i am only able send 24 bytes each ,when i try to more than that i am getting error "NRF_ERROR_INVALID_DATA" .what might be the issue?

waiting for your reply.

Thanks you.

RE: which program to choose to advertise data over BLE ?

Edvin — Wed, 14 Mar 2018 08:19:07 GMT

You can change the advertising data, but you will have to stop advertising using sd_ble_gap_adv_stop(). This will always return NRF_SUCCESS, unless it isn't advertising, in which case you can ignore the return value from this call.

Then run ble_advertising_init() again with the updated advertising data. You can e.g. set up a timer and read thermometer data, and update the advertising data if the temperature has changed significantly from the current "advertising value".

Remember to stop the advertising before you run ble_advertising_init() and ble_advertising_start() again.

Best regards,

Edvin

RE: which program to choose to advertise data over BLE ?

SKV — Wed, 14 Mar 2018 07:16:34 GMT

Hello Edvin,

Thank you for replying i was able to send more the 31 bytes of data in the advertisement packet by adding the scan response data in the advertising_init() function . I have one last question i have to make the data to be advertise in real time when there is change in the temperature . Is there is a way to do it in real time ? If yes can you suggest any.

Thank you,

vasanth

RE: which program to choose to advertise data over BLE ?

Edvin — Tue, 13 Mar 2018 08:37:27 GMT

Hello,

As of now, it is not possible to have advertising packets longer than 31 bytes. Mohammad Afaneh wrote a blogpost which you can find here, which explains the features of BLE 5 advertising. As it also says, many of these features are not yet available through the Nordic Softdevices.

You can look into scan response, which is described at the end of this Advertising Tutorial.

Best regards,

Edvin

RE: which program to choose to advertise data over BLE ?

SKV — Tue, 13 Mar 2018 07:41:24 GMT

Thanks for replying Edvin,

The problem is solved. I am able to get the advertisement packets.But it is limited to 31 bytes i want to send 64 bytes of data. can you help me how to solve the issues or suggest me a post to look up for info.

Thanks for helping once again.

RE: which program to choose to advertise data over BLE ?

Edvin — Thu, 08 Mar 2018 15:22:13 GMT

Hello,

This means that there is probably an err_code != 0 in one of the APP_ERROR_CHECK(err_code) calls. Can you try to disable the optimization, and then define "DEBUG" in your preprocessor defines? I don't know what IDE you use (if any), but in most IDEs, it is usually found in the project settings->C/C++.

Try to do that, and then see if it stops on line 76, and if you can see where the APP_ERROR_CHECK was called from. You need to do both of the steps above to find this information.

BR,

Edvin

RE: which program to choose to advertise data over BLE ?

SKV — Thu, 08 Mar 2018 09:47:36 GMT

Hello Edvin,

Thanks for replying .

Does it run into the main() function - Yes it does runs in the main.
If it starts in main(), where does it stop? - It stops in uint8_t c = NRF_LOG_GETCHAR();(in line number 520) if i set a break point over the line and after running from the line 520 i have to open a putty window and enter the command to read the data or to print .When i run this it never stops .
Does it say what line_num, p_file_name, and err_code that set the error? If it says "out of scope" disable optimization - It shows me "not in scope" it goes to app_error_weak.c and shows me app_error_fault _handler and id , pc & info (not in scope).

If you want i can attach the entire file .

Thank you once again.

RE: which program to choose to advertise data over BLE ?

Edvin — Wed, 07 Mar 2018 13:05:38 GMT

Hello,

I was not able to compile your main.c file, because there was some external files. Does it run into the main() function, or does it not make it there? If it starts in main(), where does it stop? is it one of the functions resulting in an err_code != 0 (NRF_SUCCESS)? If the err_code is passed into APP_ERROR_CHECK when it is not 0, it will stop. Try to define "DEBUG" in your preprocessor defines, and set a breakpoint in app_error.c on line 76? Does it stop there? Does it say what line_num, p_file_name, and err_code that set the error? If it says "out of scope" disable optimization.

Best regards,

Edvin

RE: which program to choose to advertise data over BLE ?

SKV — Wed, 07 Mar 2018 06:38:23 GMT

Thanks for the quick reply norin saiyed.

I followed the link the code is working but there is still no advertisement . The break-point is not reaching the advertising_init(); in the debug mode . What might be the problem.

Thanks in advance.

RE: which program to choose to advertise data over BLE ?

norin saiyed — Tue, 06 Mar 2018 10:50:51 GMT

see this link

devzone.nordicsemi.com/.../122741

RE: which program to choose to advertise data over BLE ?

SKV — Tue, 06 Mar 2018 10:43:15 GMT

Hi everyone,

One of my colleague suggested me to use ble_app_beacon example to advertise the data of the Temperature using BLE . Now i can execute the program but there is no advertisement of the beacon when i see it in the nrf-connect app. What might be the problem ?

Here is my main code ( main.c )

Thanks in advance.