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38 lines
891 B
JavaScript
38 lines
891 B
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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var sensorObj = require('jsupm_mg811');
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// Instantiate an MG811 on analog pin A0, and digital pin D2 with an
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// analog reference voltage of MG811_AREF (5.0)
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var sensor = new sensorObj.MG811(0, 2, 5.0);
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// Every tenth of a second, sample the sensor and output it's
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// detected CO2 concentration in parts per million (ppm)
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setInterval(function()
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{
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console.log("CO2 concentration in PPM: " + sensor.ppm());
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}, 100);
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// exit on ^C
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process.on('SIGINT', function()
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{
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sensor = null;
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sensorObj.cleanUp();
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sensorObj = null;
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console.log("Exiting.");
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process.exit(0);
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});
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