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49 lines
1.2 KiB
JavaScript
49 lines
1.2 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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* 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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// 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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