/*jslint node:true, vars:true, bitwise:true, unparam:true */ /*jshint unused:true */ /* * Author: Jon Trulson * Copyright (c) 2016 Intel Corporation. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ var sensorObj = require('jsupm_dfrorp'); // Instantiate a DFRobot ORP sensor on analog pin A0 with an analog // reference voltage of 5.0. var sensor = new sensorObj.DFRORP(0, 5.0); // To calibrate: // // Disconnect the sensor probe (but leave the sensor interface board // connected). Then run one of the examples while holding down the // 'calibrate' button on the device. Read the ORP value reported // (it should be fairly small). // // This value is what you should supply to setCalibrationOffset(). // Then reconnect the probe to the interface board and you should be // ready to go. // // DO NOT press the calibrate button on the interface board while // the probe is attached or you can permanently damage the probe. sensor.setCalibrationOffset(0.97); // Every second, update and print values setInterval(function() { sensor.update(); console.log("ORP: " + sensor.getORP() + " mV"); console.log(); }, 1000); // exit on ^C process.on('SIGINT', function() { sensor = null; sensorObj.cleanUp(); sensorObj = null; console.log("Exiting."); process.exit(0); });