Hardware requirements for collecting modem traces.

[kk2mkk]

Hi,

As we are in design phase of our custom board based on nRF9160, can you please let us know what all pins needs to be exposed in our design for collecting modem traces?

regards

KK

[kk2mkk]

I wanted to collect the trace data over the UART using the trace collector tool, similar to this post

https://devzone.nordicsemi.com/f/nordic-q-a/58041/nrf9160-modem-trace-not-working

Based on the code I even tried switching to different UART and baudrate, but still I don’t see any trace data on the serial lines.

regards

KK

[kk2mkk]

Thanks Simon, its working.

I think the Trace collector tool is hard coded to 1Meg baudrate so in the code i need to stick to the same to use the tool, attaching the trace logtrace-2020-07-08T08-05-10.965Z.bin which i have collected using the tool, since its not readable format and based on certain string in there i assume the trace file i collected in valid format.

regards

KK

[Simon]

I am not very familiar with modem traces and how the information in it is organized and if the trace you got out is valid.

By default, uart1 is used and the data goes directly into the Trace Collector app via USB VCOM2 port. The Trace collector app might parse the data in some way.

Should I look into this or close the case?

[kk2mkk]

https://devzone.nordicsemi.com/nordic/cellular-iot-guides/b/getting-started-cellular/posts/how-to-get-modem-trace-using-trace-collector-in-nrf-connect

Since these log files are intended for Nordic R&D for analysis i leave it up to you.

regards

KK

[Martin Lesund]

Hi KK,
I can verify that the file trace file you took is valid.
The "Trace Collector" app only saves what is pushed on the VCOM to a .bin file. It does not modify or parse anything.