How to deal with GATT TIMEOUT

RE: How to deal with GATT TIMEOUT

Edvin — Tue, 11 Jun 2024 12:08:10 GMT

That is the log when you changed to NRF_CLOCK_LF_SRC_XTAL?
What phone are you using?
Have you tried another type of phone? Does it look the same?
Can you please try to capture a sniffer trace of the connection and upload the trace (.pcapng file)? You can use the nRF Sniffer for Bluetooth LE.
And what does it look like when you run the same application on a DK?

Best regards,

Edvin

RE: How to deal with GATT TIMEOUT

Chaoyue Ying — Tue, 11 Jun 2024 04:13:34 GMT

And I get such log when my phone connecting.

RE: How to deal with GATT TIMEOUT

Chaoyue Ying — Tue, 11 Jun 2024 04:06:26 GMT

Hi, 你好,

I didn't try to run in a DK.我没想穿DK跑步。

I'm contacting with agency to get the datasheet for that crystal.

我正在联系代理商拿到那块水晶的数据表。

My LFCLK settings as fllow:我的LFCLK设置如下:

Finally,when I set NRF_SDH_CLOCK_LF_SRC 2,What should I do and how can I judge whether the clock may be the issue?

RE: How to deal with GATT TIMEOUT

Edvin — Mon, 10 Jun 2024 08:10:47 GMT

Have you tried running the application on a DK yet, to see if you get the same issue?

On your custom board, do you have an LFXTAL, or do you use the RC Oscillator?

If you are using an XTAL, do you have the datasheet for that crystal?

And whether you are using an XTAL or RC Oscillator, what are your LFCLK settings in sdk_config:

NRF_SDH_CLOCK_LF_SRC
NRF_SDH_CLOCK_LF_RC_CTIV
NRF_SDH_CLOCK_LF_RC_TEMP_CTIV
NRF_SDH_CLOCK_LF_ACCURACY

And finally, can you, for debugging purposes, try to use the LF_SRC_SYNTH by setting:

NRF_SDH_CLOCK_LF_SRC 2

Don't use this for production, because it will significantly increase the current consumption, but it will let us know whether the clock may be the issue right now.

Best regards,

Edvin

RE: How to deal with GATT TIMEOUT

Chaoyue Ying — Thu, 06 Jun 2024 05:00:13 GMT

Hi, 你好,

I have issues when the nRF is the peripheral.It connect with my mobile phone and check log with nRF Connect.The log as follow.
我错了

Sometimes,the error code is 0x22(LMP Response Timeout).

Either 0x08 or 0x22 happened,the data will not be send to periphral until the next Connection parameters updated…… occured.(The screenshot is return to nrmal quickly).

But I still want to repair the question automatically in peripheral when it happened.Otherwise,the data maybe losed.

How can I change the code to arrive it?

RE: How to deal with GATT TIMEOUT

Edvin — Wed, 05 Jun 2024 11:33:30 GMT

Hello,

By "clean machine" I meant "another machine". But you don't need another machine. Just unzip the folder that you uploaded to me in a new location, and see if you can build it from there.

[quote user="Chaoyue Ying"]

About the project,first I build it for nrf52832 but I get information from screenshot that you build it in nrf52840.

[/quote]

Oh, sorry. My mistake. Yes. The pca10040 project builds fine.

So the connection that you are having issues with, is that when the nRF is the peripheral or central? (I see that it both advertises and scans). And what is it connected to? Your mobile phone? I was able to program it, and connect to it using nRF Connect for Desktop -> Bluetooth Low Energy

And I can send data from the central to the peripheral.

RE: How to deal with GATT TIMEOUT

Chaoyue Ying — Wed, 05 Jun 2024 02:05:09 GMT

Hello,

I'm sorry that I not save any screenshots.So I cannot provide.

I try to send data to my board but the log is not happened just like the nus service not be connected.I add log out in nus callback function,if data send by central,the log will output some informations about it.

I do not use the DK board,So I also not try another DK.

About the project,first I build it for nrf52832 but I get information from screenshot that you build it in nrf52840.

Then,these errors seem that the include paths did not work which included in my package.

I don't know how the machine can be called a clean mechine.Can you tell me what should I do to get a clean machine to build and run my application?

RE: How to deal with GATT TIMEOUT

Edvin — Tue, 04 Jun 2024 08:46:30 GMT

Hello,

[quote user=""]

The condition happened frequently in my application that the connection is still display connected but the nus service is not avaliable.

[/quote]

Can you please share some screenshots of what this looks like?

Have you tried connecting to the device using another DK running nRF Connect for Desktop -> Bluetooth Low Energy?

I tried to build your project, but I got these errors:

(I also fixed a bunch of missing header files before this).

I could fix these errors, but I suspect that if I do, I will not be running the same application that you are. Are you able to build and run the application that you uploaded on a clean machine?

Best regards,

Edvin