__LOG @ LOG_LEVEL_INFO is unable to log info in the terminal emulator

[Rahul R G]

Hello everyone,

I am facing a problem with the 'light_switch' example project.

SDK- nRF SDK for Mesh 5.0.0 & nRF5 SDK 17.0.2

IDE: SEGGER EmStudio for ARM 5.68

Building and running the program on the nRF52DK is happening smoothly, and was able to provision the device without any hassle using nRF Mesh app.

The problem lies in the fact that my terminal emulator is not showing any logs, that are meant to be shown.

 __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "----- BLE Mesh Light Switch Server Demo -----\n");

For example, the above line in main.c is supposed to log the string on a run, but is not shown.

Likewise, I have tried to build and run other examples from the Mesh SDK, but to no avail.

I might be forgetting something or doing something wrong, but am unable to find a solution for it.

Any sort of help would be much appreciated!

[Joakim Jakobsen]

Hi. 

RTT logging should already be enabled by default. Can you see the logs in the logs in the debug terminal in SES?

What terminal emulator are you using?

Br, 
Joakim

[Rahul R G]

Hello Joakim,

Yes, I'm able to view the logs on the debug terminal, when run on debug mode

The terminal emulator I'm using is the standard UART based one present in the IDE.

Best Regards,

Rahul R

[Joakim Jakobsen]

Thank you. 

If you can see the logs in the debug terminal, then at least we have verified that logging is in fact enabled. 

The Mesh SDK doesn't support logging via UART by default, but there are several previous posts about the topic already on devzone. 

Ref: https://devzone.nordicsemi.com/f/nordic-q-a/63816/mesh-sdk-examples-enable-uart-logging/261018#261018 

Br, 
Joakim

[Rahul R G]

Hello Joakim,

Thank you for the response.

So, based on the referenced posts, a modification to the log.c file along with changing callbacks to main.c, there is a workaround for the terminal emulator to log the data, right?

Also how would you normally view log data from a function like

 __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "----- BLE Mesh Light Switch Server Demo -----\n");

Does it something to do with a a standalone logger like RTT Viewer?

Best Regards,

Rahul R

[Joakim Jakobsen]

It's possible to log via UART, yes. Ref. the post in my previous comment.

Rahul R G said:

The terminal emulator I'm using is the standard UART based one present in the IDE.

In which IDE is this?

______

Are you able to see the logs in RTT viewer?

Br,
Joakim