1. Overview

This note describes how to set up and use the serial console for the SOM-NRF9151 board. Use of the Zephyr interactive shell command interface, on top of the serial consoles, is explained as well.

2. Setting Up Serial Consoles

After the board is connected to your Linux PC, use dmesg to identify the board serial port:

$ sudo dmesg
...
TBD
...

Connect to it using a terminal program on your Linux PC:

picocom -b 115200 /dev/ttyUSB0

After the application image is programmed to the target board, reset the board and observe the Zephyr banner and shell on the serial console:

TBD
uart:~$

3. Using Zephyr Shell

The SOM-NRF9151 software is configured to run the Zephyr interactive shell command interface in the serial console.

Most of the standard Zephyr shell features are available, such as the auto-completion, command history, etc.

Various Zephyr shell commands are enabled:

uart:~$ kernel
kernel - Kernel commands
Subcommands:
  cycles     :Kernel cycles.
  reboot     :Reboot.
  stacks     :List threads stack usage.
  threads    :List kernel threads.
  version    :Kernel version.
  sleep      :ms
  log-level  :<module name> <severity (0-4)>
uart:~$ device
device - Device commands
Subcommands:
  list  :List configured devices
uart:~$