nRF Connect Trace Collector v1.1.3 or later

Enabling tracing in the application

To capture a modem trace, you must configure your application to enable trace output over Universal Asynchronous Receiver/Transmitter (UART).

The following instructions assume that your application is based on the nRF Connect SDK.
Note: By default, nRF Connect SDK's modem library uses the UART1 peripheral for trace output. This means that you cannot use UART1 for other purposes in your application. If this does not work for your application, you must update the configuration and code of the modem library to use a different UART peripheral for trace output.

Complete the following steps to enable tracing:

  1. Set the CONFIG_NRF_MODEM_LIB_TRACE option in your application.
    See Configuring your application for instructions on how to set this option temporarily or permanently.
    Note:
    • In nRF Connect SDK versions 1.5.0 - 2.0.0, the option was called CONFIG_NRF_MODEM_LIB_TRACE_ENABLED.
    • In nRF Connect SDK v1.5.x, setting the option temporarily might cause a build error. In that case, set the option permanently in the prj.conf file.
    • In nRF Connect SDK versions before 1.5.0, the option was called CONFIG_BSD_LIBRARY_TRACE_ENABLED.
  2. Set the switch that configures which chip to program to the nRF91 position.
    This switch is labeled PROG/DEBUG (SW10 on nRF9160 DK v0.15.0 and later, SW5 on earlier versions).
  3. Connect your device to the computer with a Universal Serial Bus (USB) cable and power it on or reset it if it is already connected.
  4. Build your application and program it to the device.
    Follow the instructions in Building and programming a sample application.
Parent topic: Collecting a modem trace for the nRF9160 DK