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45 lines
1.2 KiB
JavaScript
45 lines
1.2 KiB
JavaScript
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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// JavaScript example for the MaxSonar-EZ family of ultrasonic range finders
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// analog voltage, usually 3.3 or 5.0
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var MAXSONAREZ_AREF = 5.0;
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var MaxSonarEZ = require('jsupm_maxsonarez');
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// Instantiate a MaxSonar-EZ on analog pin A1, with an analog
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// reference voltage of MAXSONAREZ_AREF
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var mySonar = new MaxSonarEZ.MAXSONAREZ(1, MAXSONAREZ_AREF);
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// Every second, sample the sonar and output the distance to an
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// object in inches.
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// With the EZ3 version, the minimum and maximum ranges seemed to be
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// between 6 and 33 inches
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var myInterval = setInterval(function()
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{
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console.log("AREF: " + MAXSONAREZ_AREF +
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", distance in inches: " + mySonar.inches());
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}, 1000);
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// Print message when exiting
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process.on('SIGINT', function()
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{
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clearInterval(myInterval);
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mySonar = null;
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MaxSonarEZ.cleanUp();
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MaxSonarEZ = null;
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console.log("Exiting...");
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process.exit(0);
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});
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