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This module implements support for the DFRobot Laser PM2.5 Sensor. It connects to a UART at 9600 baud. This is the only baud rate supported. It optionally supports Reset and Set/Sleep gpios as well. Signed-off-by: Jon Trulson <jtrulson@ics.com>
64 lines
2.0 KiB
JavaScript
64 lines
2.0 KiB
JavaScript
/*jslint node:true, vars:true, bitwise:true, unparam:true */
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/*jshint unused:true */
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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var sensorObj = require('jsupm_hka5');
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// Instantiate a HKA5 sensor on uart 0. We don't use the set or
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// reset pins, so we pass -1 for them.
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var sensor = new sensorObj.HKA5(0, -1, -1);
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// update once every 2 seconds and output data
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setInterval(function()
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{
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sensor.update()
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console.log("PM 1 : "
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+ sensor.getPM1()
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+ " ug/m3");
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console.log("PM 2.5: "
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+ sensor.getPM2_5()
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+ " ug/m3");
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console.log("PM 10 : "
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+ sensor.getPM10()
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+ " ug/m3");
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console.log();
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}, 2000);
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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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