recv() hangs

[nmlkpoiu]

Hi

  We used one German SIM card(1NCE) on both of our product and 9160 dk, in both cases the recv() hangs after the downloading started at some point. I tried all nrf sdk versions(1.4.0; 1.3.0; 1.2.0) and most modem version(mfw_nrf9160_1.2.0, mfw_nrf9160_1.2.1, mfw_nrf9160_1.2.2). It doesn't help.

   Can you help to analyses where it could go wrong?

one debug log before hangs:

Press Button 1 to start the FOTA download, wait for new app
I: Connecting to nrfconnectsdk.s3.eu-central-1.amazonaws.com
I: Downloading: app_update.bin [0]
I: Downloaded 2048/155242 bytes (1%)
I: Erasing page at offset 0x00086000
I: Downloaded 4096/155242 bytes (2%)
I: Downloaded 6144/155242 bytes (3%)
I: Erasing page at offset 0x00087000
I: Downloaded 8192/155242 bytes (5%)
I: Downloaded 10240/155242 bytes (6%)
I: Erasing page at offset 0x00088000
I: Downloaded 12288/155242 bytes (7%)

[nmlkpoiu]

I notice the app_update.bin in nrfconnectsdk.s3.eu-central-1.amazonaws.com bucket from the http_application_update sample works more stable, which version of nrf sdk does the app_update.bin use?

[Heidi]

Hi!

Could I please have the full log in a text file?

Are you using HTTP application update in NCS out-of-box or a modified version or your own application?

nmlkpoiu said:

which version of nrf sdk does the app_update.bin use?

 The app_update.bin on your AWS server is a file you have uploaded, so which NCS version it's built with depends on what you built the application with.

Best regards,

Heidi

[Heidi]

1. Thank you. I will see if I can reproduce this issue. It could be a problem with your network, in which we will need a modem trace to look into it further.

2. Okay, I see what you are asking. The application is the HTTP application update sample from NCS 1.4.0, nrf commit 5522ca2b5f4c93eab5229f2f3f0e7bd08389cbe8. 

Have you set up your own bucket for testing? I see from the log it still says 

"Connected to nrfconnectsdk.s3.eu-central-1.amazonaws.com".

Remember to change CONFIG_DOWNLOAD_HOST to your own server.

[Heidi]

Hi, I am unable to reproduce the issue you're describing. Could you please try to take a modem trace when the application is running?

Best regards,

Heidi

[nmlkpoiu]

Hi Heidi,

 Thanks for your time. I was unable to reproduce the hanging bug in last weekend,

 But I still not feeling safe, it may hangs in real product in the field. I will try to reproduce it again. Sooner or later. Thanks

[nmlkpoiu]

Hi Hedi,

  I run the http_application_update sample from V1.3.0 on 9160 DK and modem version is mfw_nrf9160_1.2.1;

  I met another issue, after the download app_update.bin from  nrfconnectsdk.s3.eu-central-1.amazonaws.com, I use 1 sysreboot(0)  or 2: press the reset button. Both way end up still the old image boot up instead of the new downloaded image. 

Do you know why? Am I missing a config flag or the app_update.bin is damaged?

[Heidi]

Hi, 

That could have to do with the CONFIG_APPLICATION_VERSION configuration. This needs to be 2 for the image uploaded to the S3 bucket and 1 for the application flashed to the DK. 

The app_update.bin file on the nrfconnectsdk should have the correct application version since it was uploaded by a Nordic developer, so make sure the app you're flashing to your device has the application version 1. 

Best regards,

Heidi