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58 lines
1.5 KiB
JavaScript
58 lines
1.5 KiB
JavaScript
/*jslint node:true, vars:true, bitwise:true, unparam:true */
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/*jshint unused:true */
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 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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var sensorObj = require('jsupm_dfrorp');
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// Instantiate a DFRobot ORP sensor on analog pin A0 with an analog
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// reference voltage of 5.0.
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var sensor = new sensorObj.DFRORP(0, 5.0);
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// To calibrate:
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//
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// Disconnect the sensor probe (but leave the sensor interface board
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// connected). Then run one of the examples while holding down the
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// 'calibrate' button on the device. Read the ORP value reported
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// (it should be fairly small).
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//
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// This value is what you should supply to setCalibrationOffset().
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// Then reconnect the probe to the interface board and you should be
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// ready to go.
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//
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// DO NOT press the calibrate button on the interface board while
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// the probe is attached or you can permanently damage the probe.
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sensor.setCalibrationOffset(0.97);
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// Every second, update and print values
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setInterval(function()
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{
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sensor.update();
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console.log("ORP: "
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+ sensor.getORP()
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+ " mV");
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console.log();
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}, 1000);
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// exit on ^C
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process.on('SIGINT', function()
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{
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sensor = null;
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sensorObj.cleanUp();
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sensorObj = null;
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console.log("Exiting.");
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process.exit(0);
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});
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