Transmitting large data (NRF5340 Audio DK)

RE: Transmitting large data (NRF5340 Audio DK)

Elfving — Tue, 17 Dec 2024 14:45:43 GMT

Ah understood. Are you receiving this data with nRF Connect application?

RE: Transmitting large data (NRF5340 Audio DK)

pal_722 — Tue, 17 Dec 2024 10:53:28 GMT

[quote userid="103347" url="~/f/nordic-q-a/116549/transmitting-large-data-nrf5340-audio-dk/515235"]But on a separate DK, right?[/quote]

I am using nrf5340 Audio DK, configured as peripheral and Mobile as the central.

RE: Transmitting large data (NRF5340 Audio DK)

Elfving — Tue, 17 Dec 2024 09:10:32 GMT

[quote user="pal_722"]

OK. I'll look into the courses.

[/quote]

Great, I think that is a great resource and starting point 🙂

[quote user="pal_722"]The array is randomly generated and sent to the mobile using bt_nus_send() function and I receive the array in the TX characteristics under NUS, where the array is updated when the notification is enabled.
[/quote]

But on a separate DK, right?

RE: Transmitting large data (NRF5340 Audio DK)

pal_722 — Tue, 17 Dec 2024 04:58:59 GMT

Hi Elfving

[quote userid="103347" url="~/f/nordic-q-a/116549/transmitting-large-data-nrf5340-audio-dk/515103"] should also mention that our DevAcademy courses are a great resource, I bet the one about Bluetooth would be very interesting for you.[/quote]

OK. I'll look into the courses.

[quote userid="103347" url="~/f/nordic-q-a/116549/transmitting-large-data-nrf5340-audio-dk/515103"]So you are sending this data array you created, could you expand a bit on the part about the characteristics? What are you using on the other end? A BLE central sample?[/quote]

The array is randomly generated and sent to the mobile using bt_nus_send() function and I receive the array in the TX characteristics under NUS, where the array is updated when the notification is enabled.

Regards
Pallavi

RE: Transmitting large data (NRF5340 Audio DK)

Elfving — Mon, 16 Dec 2024 13:03:14 GMT

I see.

I should also mention that our DevAcademy courses are a great resource, I bet the one about Bluetooth would be very interesting for you.

So you are sending this data array you created, could you expand a bit on the part about the characteristics? What are you using on the other end? A BLE central sample?

Regards,

Elfving

RE: Transmitting large data (NRF5340 Audio DK)

pal_722 — Fri, 13 Dec 2024 04:32:45 GMT

Hi Elfving

[quote userid="103347" url="~/f/nordic-q-a/116549/transmitting-large-data-nrf5340-audio-dk/514515"]Susheel is currently out of office, so I will take care of this case in the meantime. [/quote]

Ok.

[quote userid="103347" url="~/f/nordic-q-a/116549/transmitting-large-data-nrf5340-audio-dk/514515"]Could you tell me what peripheral sample you used? [/quote]

i have used Bluetooth: Peripheral, demonstrating the BLE Peripheral role.

[quote userid="103347" url="~/f/nordic-q-a/116549/transmitting-large-data-nrf5340-audio-dk/514515"]And my understanding is that you are using normal BLE for this, not LE Audio, is that correct?[/quote]

Yes, I am using normal BLE.

I hope I have given you some clarity.

Thank you

RE: Transmitting large data (NRF5340 Audio DK)

Elfving — Wed, 11 Dec 2024 13:14:43 GMT

Hi again Pollavi,

Susheel is currently out of office, so I will take care of this case in the meantime.

I just want to start off with some questions to clear things up for me.

Could you tell me what peripheral sample you used? And my understanding is that you are using normal BLE for this, not LE Audio, is that correct?

Regards,

Elfving

RE: Transmitting large data (NRF5340 Audio DK)

pal_722 — Mon, 09 Dec 2024 05:19:35 GMT

Hi @Susheel Nuguru

Attaching the configuration file.

Thank you

devzone.nordicsemi.com/.../4380.prj.conf

RE: Transmitting large data (NRF5340 Audio DK)

Susheel Nuguru — Tue, 03 Dec 2024 08:41:00 GMT

A colleague of mine says that it will help if you can send your whole prj.conf file for getting a full context of what modules you are using.

RE: Transmitting large data (NRF5340 Audio DK)

Susheel Nuguru — Tue, 03 Dec 2024 06:55:24 GMT

Hi Pallavi,
Unfortunately nRF Sniffer is not able to decode the audio packets, So you would need Ellisys sniffer to sniff the packets. I will ask my colleague to see if there is anything obviously wrong that I missed to see in the config here.

RE: Transmitting large data (NRF5340 Audio DK)

pal_722 — Wed, 27 Nov 2024 06:37:39 GMT

Hi Susheel Nuguru

I used these buffers, and found there is no change in the reception of data. If I try sending any data above 512 bytes, the max I receive is 600 bytes.

Not sure what am I doing wrong. Is streaming useful? Can I stream the data, so that I can receive as many bytes as I want?
And, Can I know what you mean by sniffer?

Thanks and Regards

RE: Transmitting large data (NRF5340 Audio DK)

Susheel Nuguru — Sun, 24 Nov 2024 10:36:24 GMT

Normally you need to increase the BLE TX buffers if you want to send data in bigger chunks, there are quite a lot of parameters that come to play but you can start with checking with some TX buffer size in your config. With DLE enabled, you should have some thing like below for TX buffers

CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_BUF_ACL_TX_COUNT=10
CONFIG_BT_BUF_ACL_RX_COUNT=10
CONFIG_BT_BUF_ACL_RX_SIZE=251

If you have a sniffer that you can sniff to see more details that is happening in the air transactions, then we can get some more info on the transactions size and timings.

RE: Transmitting large data (NRF5340 Audio DK)

pal_722 — Fri, 22 Nov 2024 05:55:17 GMT

Hi Susheel Nuguru , Thanks for the reply.

[quote userid="6207" url="~/f/nordic-q-a/116549/transmitting-large-data-nrf5340-audio-dk/511417"]the data never appears in the application?[/quote]

Yes. I do not receive the data in the app.

i am trying to send VND_MAX_LEN number of 1's to each characteristic.

I had used the existing Peripheral sample code to customize my application.
Please let me know if you need any further details.

Thank you!
Regards
Pallavi

RE: Transmitting large data (NRF5340 Audio DK)

Susheel Nuguru — Thu, 21 Nov 2024 07:29:19 GMT

Can you please give us more details on how exactly you are trying to send 1024 and 2048 bytes of data, and what do you mean by losing data? the data never appears in the application? BLE is an acknowledge based protocol, so it means that the data is received by the controller and mostly the host, it is most of the time application corner cases, where data is lost. If you give more specific details and probably some code snippets demonstrating what you are trying to do, then we can attempt to assist you.