text: /*
  * Author: Jon Trulson <jtrulson@ics.com>
  * Copyright (c) 2015 Intel Corporation.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sublicense, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * The above copyright notice and this permission notice shall be
  * included in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
  
  // JavaScript example for the MaxSonar-EZ family of ultrasonic range finders
  
  // analog voltage, usually 3.3 or 5.0
  var MAXSONAREZ_AREF = 5.0;
  
  var MaxSonarEZ = require('jsupm_maxsonarez');
  
  // Instantiate a MaxSonar-EZ on analog pin A1, with an analog
  // reference voltage of MAXSONAREZ_AREF
  var mySonar = new MaxSonarEZ.MAXSONAREZ(1, MAXSONAREZ_AREF);
  
  // Every second, sample the sonar and output the distance to an
  // object in inches.
  
  // With the EZ3 version, the minimum and maximum ranges seemed to be
  // between 6 and 33 inches
  
  var myInterval = setInterval(function()
  {
  	console.log("AREF: " + MAXSONAREZ_AREF + 
                      ", distance in inches: " + mySonar.inches());
  }, 1000);
  
  // Print message when exiting
  process.on('SIGINT', function()
  {
  	clearInterval(myInterval);
  	mySonar = null;
  	MaxSonarEZ.cleanUp();
  	MaxSonarEZ = null;
  	console.log("Exiting...");
  	process.exit(0);
  });
  