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46 lines
1.3 KiB
JavaScript
46 lines
1.3 KiB
JavaScript
/*
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* Author: Zion Orent <zorent@ics.com>
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* Copyright (c) 2014 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 file for GP2Y0A family of IR Proximity Sensors
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// analog voltage, usually 3.3 or 5.0
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var GP2Y0A_AREF = 5.0;
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var SAMPLES_PER_QUERY = 20;
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var IRProximity = require('jsupm_gp2y0a');
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// Note, for the Grove 80cm version of this sensor, due to the way it is wired,
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// you need to plug this into the A0 port, where it will use the available
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// A1 pin for data.
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// Instantiate a GP2Y0A on analog pin A1
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var myVolts = new IRProximity.GP2Y0A(1);
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// The higher the voltage (closer to AREF) the closer the object is.
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// NOTE: The measured voltage will probably not exceed 3.3 volts.
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// Every second, print the averaged voltage value
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// (averaged over 20 samples).
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var myInterval = setInterval(function()
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{
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console.log("AREF: " + GP2Y0A_AREF +
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", Voltage value (higher means closer): " +
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myVolts.value(GP2Y0A_AREF, SAMPLES_PER_QUERY));
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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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myVolts = null;
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IRProximity.cleanUp();
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IRProximity = null;
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console.log("Exiting...");
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process.exit(0);
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});
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