di-sensors/lib/sensors/base/sensor.js

Drivers and examples for using DI_Sensors in Node.js

'use strict';

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

// https://www.dexterindustries.com/GoPiGo/
// https://github.com/DexterInd/DI_Sensors
//
// Copyright (c) 2017 Dexter Industries
// Released under the MIT license (http://choosealicense.com/licenses/mit/).
// For more information see https://github.com/DexterInd/GoPiGo3/blob/master/LICENSE.md

var _ = require('lodash');

var EventEmitter = require('events');
var DexterI2C = require('../dexterI2c');

var Sensor = function (_EventEmitter) {
    _inherits(Sensor, _EventEmitter);

    // ms

    function Sensor(bus, address, opts) {
        _classCallCheck(this, Sensor);

        var _this2 = _possibleConstructorReturn(this, (Sensor.__proto__ || Object.getPrototypeOf(Sensor)).call(this));

        _this2.i2c = new DexterI2C(bus, address, opts);
        _this2.lastValue = 0;
        _this2.currentValue = 0;
        _this2.streamInterval = _this2.watchInterval = undefined;
        _this2.watchDelay = Sensor.WATCH_DELAY;
        _this2.streamDelay = Sensor.STREAM_DELAY;
        return _this2;
    }
    // ms


    _createClass(Sensor, [{
        key: 'read',
        value: function read() {}
    }, {
        key: 'write',
        value: function write() {}
    }, {
        key: 'stream',
        value: function stream() {
            var delay = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.streamDelay;
            var callBack = arguments[1];

            var _this = this;

            this.stopStream();
            this.streamInterval = setInterval(function () {
                var res = _this.read();
                callBack(res);
            }, delay);
        }
    }, {
        key: 'stopStream',
        value: function stopStream() {
            clearInterval(this.streamInterval);
        }
    }, {
        key: 'watch',
        value: function watch() {
            var _this3 = this;

            var delay = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.watchDelay;

            var _this = this;

            this.stopWatch();
            this.watchInterval = setInterval(function () {
                var res = _this.read();

                _this.lastValue = _this.currentValue;
                _this3.currentValue = res;

                if (!_.isEqual(_this.currentValue, _this.lastValue)) {
                    _this.emit('change', _this.currentValue);
                }
            }, delay);
        }
    }, {
        key: 'stopWatch',
        value: function stopWatch() {
            clearInterval(this.watchInterval);
        }
    }]);

    return Sensor;
}(EventEmitter);

Sensor.WATCH_DELAY = 100;
Sensor.STREAM_DELAY = 100;


module.exports = Sensor;