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46 lines
1.2 KiB
JavaScript
46 lines
1.2 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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// Load Compass module
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var hmc5883l = require('jsupm_hmc5883l');
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// load this on i2c
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var myCompass = new hmc5883l.Hmc5883l(0);
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// Set your declination from true north in radians
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myCompass.set_declination(0.2749);
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var coordsObj;
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// Print out the coordinates, heading, and direction every second
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setInterval(function()
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{
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myCompass.update(); // Update the coordinates
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coordsObj = myCompass.coordinates();
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var coords = (coordsObj.getitem(0) + " ");
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coords += (coordsObj.getitem(1) + " ");
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coords += coordsObj.getitem(2);
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var heading = round2Digits(myCompass.heading());
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var direction = round2Digits(myCompass.direction());
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var compassResults = "coords: " + coords +
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" heading: " + heading + " direction " + direction;
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console.log(compassResults);
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}, 1000);
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function round2Digits(num)
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{
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return Math.round((num + 0.00001) * 100) / 100;
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}
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// Print message when exiting
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process.on('SIGINT', function()
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{
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console.log("Exiting...");
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process.exit(0);
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});
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