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62 lines
2.1 KiB
JavaScript
62 lines
2.1 KiB
JavaScript
/*
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* Author: Zion Orent <zorent@ics.com>
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* Copyright (c) 2015 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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// analog voltage, usually 3.3 or 5.0
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var OTP538U_AREF = 5.0;
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var tempIRSensor_lib = require('jsupm_otp538u');
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// Instantiate a OTP538U on analog pins A0 and A1
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// A0 is used for the Ambient Temperature and A1 is used for the
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// Object temperature.
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var tempIRSensor_obj = new tempIRSensor_lib.OTP538U(0, 1, OTP538U_AREF);
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function checkTemp()
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{
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var outputStr = "Ambient temp: " +
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roundNum(tempIRSensor_obj.ambientTemperature(), 2) +
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" C, Object temp: " +
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roundNum(tempIRSensor_obj.objectTemperature(), 2) +
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" C";
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console.log(outputStr);
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}
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var myInterval = setInterval(checkTemp, 1000);
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function roundNum(num, decimalPlaces)
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{
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var extraNum = (1 / (Math.pow(10, decimalPlaces) * 1000));
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return (Math.round((num + extraNum) *
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(Math.pow(10, decimalPlaces))) / Math.pow(10, decimalPlaces));
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}
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// When exiting: clear interval and print message
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process.on('SIGINT', function()
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{
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clearInterval(myInterval);
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console.log("Exiting...");
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process.exit(0);
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});
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