Expected result
  ===============
  This test application is polling all available SAUL devices periodically for
  their data. This data is then printed to STDIO.
  
  Background
  ==========
  The actual devices that are actually polled depend on the devices that are
  configured for a particular platform. If you want to test the SAUL interface
  to a particular device, you should just connect it to your BOARD and include
  the corresponding device driver using the `USEMODULE` environment variable.