peripheral devices, output ports, buttons, etc.  The
   log includes a mix of error and status information.  It can be
   quite useful for troubleshooting, especially while setting up a
   new device, since it provides error details on anything that went
   wrong as well as confirmation that features were set up as expected.
</p>
<p>
   The message log is controlled by the <a href="JSONConfigRef.htm#logging"><tt>logging</tt></a>
   property in the JSON configuration.  This property contains a sub-object wit