How to trace nrf9160 customer board at cellular monitor?

RE: How to trace nrf9160 customer board at cellular monitor?

Maria Gilje — Thu, 13 Mar 2025 14:39:32 GMT

Hi Jeff,

[quote user="Jeffery"]

Can I use NRF9160 customer board to run Cellular monitor?

If yes, did you have step-by-step document for customer board?

[/quote]

Yes, but make sure that the board satisfies the minimum requirements for the Cellular monitor and follow the documentation for sending traces over UART on a custom board.

[quote user="Jeffery"]How to generate a trace file correctly to you for analyzing LTE issue at board?[/quote]

Follow the documentation for modem trace with the Cellular monitor found here: https://docs.nordicsemi.com/bundle/nrf-connect-cellularmonitor/page/index.html

[quote user="Jeffery"]

Q2.

So, only 1000,000 bps was allowed for modem trace port?

At my customer board, I used a USB-to-RS232 cable between PC and NRF9160 modem trace TXD/RXD.

The max. baud rate of this cable is 256000 bps.

[/quote]

When UART is the backend for modem trace, 1 000 000 is the baud rate.

Best regards,

Maria

Jeffery — Wed, 05 Mar 2025 02:04:59 GMT

Hi Michal

Q1.

Can I use NRF9160 customer board to run Cellular monitor?

If yes, did you have step-by-step document for customer board?

How to generate a trace file correctly to you for analyzing LTE issue at board?

Q2.

So, only 1000,000 bps was allowed for modem trace port?

At my customer board, I used a USB-to-RS232 cable between PC and NRF9160 modem trace TXD/RXD.

The max. baud rate of this cable is 256000 bps.

Jeff

Michal — Tue, 04 Mar 2025 23:44:48 GMT

Hello Jeff,

To my knowledge, modem trace requires 1000000 (1M) baud rate.

If you select your modem UART, then you should be able to select it as your "Modem trace serial port" afterwards in the trace options.

Best regards,

Michal