Printers are host programs that receive log data, format it and display it. The following printers are currently available:

  • probe-run, parses data sent over RTT (ARM Cortex-M only). NOTE: if you are using the git version of defmt, make sure you also install the tool from git (not
  • defmt-print, a generic command-line tool that decodes defmt data passed into its standard input.
  • qemu-run, parses data sent by QEMU over semihosting (ARM Cortex-M only). NOTE: used for internal testing; won't be published to