1 /*jslint node:true, vars:true, bitwise:true, unparam:true */ 2 /*jshint unused:true */ 3 4 /* 5 * Author: Zion Orent <zorent (at) ics.com> 6 * Copyright (c) 2015 Intel Corporation. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining 9 * a copy of this software and associated documentation files (the 10 * "Software"), to deal in the Software without restriction, including 11 * without limitation the rights to use, copy, modify, merge, publish, 12 * distribute, sublicense, and/or sell copies of the Software, and to 13 * permit persons to whom the Software is furnished to do so, subject to 14 * the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be 17 * included in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 */ 27 28 var waterFlow_lib = require('jsupm_grovewfs'); 29 30 // Instantiate a Grove Water Flow Sensor on digital pin D2 31 var myWaterFlow_obj = new waterFlow_lib.GroveWFS(2); 32 33 // set the flow counter to 0 and start counting 34 myWaterFlow_obj.clearFlowCounter(); 35 myWaterFlow_obj.startFlowCounter(); 36 37 38 var millis, flowCount, fr; 39 var myInterval = setInterval(function() 40 { 41 // we grab these (millis and flowCount) just for display 42 // purposes in this example 43 millis = myWaterFlow_obj.getMillis(); 44 flowCount = myWaterFlow_obj.flowCounter(); 45 46 fr = myWaterFlow_obj.flowRate(); 47 48 // output milliseconds passed, flow count, and computed flow rate 49 outputStr = "Millis: " + millis + " Flow Count: " + flowCount + 50 " Flow Rate: " + fr + " LPM"; 51 console.log(outputStr); 52 53 // best to gather data for at least one second for reasonable 54 // results. 55 }, 2000); 56 57 58 // When exiting: clear interval and print message 59 process.on('SIGINT', function() 60 { 61 clearInterval(myInterval); 62 myWaterFlow_obj.stopFlowCounter(); 63 myWaterFlow_obj = null 64 waterFlow_lib.cleanUp(); 65 waterFlow_lib = null; 66 67 console.log("Exiting"); 68 process.exit(0); 69 }); 70
