temperature: Fixes #5 add Temperature simulator

Change-Id: I7109a2a45493477f5dba45fe3538a76ff73bdf4e

lib/temperature/index.js

@@ -18,7 +18,13 @@
 'use strict';
 
 var console = require('console');
-var BMP085 = require('bmp085-sensor');
+try {
+  var BMP085 = require('bmp085-sensor');
+} catch (err){
+  // console.log(err);
+}
+
+var Simulator = require('./simulator.js');
 
 /**
  * Class inspired by W3C's generic-sensor
@@ -41,7 +47,7 @@ function TemperatureSensor(options) {
 
   this.options = options || {};
   this.options.frequency = this.options.frequency || 1;
-  this.options.controller = this.options.controller || 'bmp085';
+  this.options.controller = this.options.controller || 'simulator';
 
   return this;
 }
@@ -78,9 +84,12 @@ TemperatureSensor.prototype.stop = function stop() {
 TemperatureSensor.prototype.start = function start() {
   var self = this;
   this.state = 'activating';
+  var BMP085 = null;
   if (!this.sensor) {
     try {
-      if ((this.options.controller === 'bmp085') || (this.options.controller === 'bmp180')) {
+      if (this.options.controller === 'simulator') {
+        this.sensor = new Simulator();
+      } else if ((this.options.controller === 'bmp085') || (this.options.controller === 'bmp180')) {
         this.sensor = new BMP085(this.options.sensor);
       } else {
         throw new Error("TODO: unsupported controller:" + this.options.controller);

lib/temperature/simulator.js

@@ -0,0 +1,52 @@
+/* -*- mode: js; js-indent-level:2; -
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright 2019-present Samsung Electronics France and other contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+'use strict';
+
+var console = require('console');
+
+function Simulator () {
+  this.value = {
+    temperature: 0,
+  };
+}
+
+Simulator.prototype.start = function (callback) {
+  return callback(null);
+}
+
+Simulator.prototype.calibrate = function (callback) {
+  return callback(null);
+}
+
+Simulator.prototype.read = function (callback) {
+  this.value.temperature = (Math.random() * 100.);
+  if (callback) return callback(null, this.value);
+};
+
+module.exports = Simulator;
+
+if (module.parent === null) {
+  var sensor = new Simulator();
+  sensor.read(function (err, value) {
+    if (err) {
+      console.error('error: ' + err);
+      throw err;
+    } else {
+      console.log('log: value=' + JSON.stringify(value));
+    }
+  });
+}