1 | var Board = require("./board");
|
2 | var Fn = require("./fn");
|
3 | var Emitter = require("events").EventEmitter;
|
4 | var util = require("util");
|
5 |
|
6 | var toFixed = Fn.toFixed;
|
7 | var priv = new Map();
|
8 |
|
9 | var Controllers = {
|
10 |
|
11 | SHT31D: {
|
12 | initialize: {
|
13 | value: function(opts, dataHandler) {
|
14 | var Multi = require("./imu");
|
15 | var driver = Multi.Drivers.get(this.board, "SHT31D", opts);
|
16 | driver.on("data", function(data) {
|
17 | dataHandler(data.humidity);
|
18 | });
|
19 | }
|
20 | },
|
21 | toRelativeHumidity: {
|
22 | value: function(raw) {
|
23 |
|
24 |
|
25 |
|
26 |
|
27 |
|
28 |
|
29 |
|
30 |
|
31 |
|
32 | return toFixed((100 * raw / 65535), 2);
|
33 | }
|
34 | }
|
35 | },
|
36 |
|
37 |
|
38 | HTU21D: {
|
39 | initialize: {
|
40 | value: function(opts, dataHandler) {
|
41 | var Multi = require("./imu");
|
42 | var driver = Multi.Drivers.get(this.board, "HTU21D", opts);
|
43 | driver.on("data", function(data) {
|
44 | dataHandler(data.humidity);
|
45 | });
|
46 | }
|
47 | },
|
48 | toRelativeHumidity: {
|
49 | value: function(raw) {
|
50 |
|
51 |
|
52 |
|
53 |
|
54 |
|
55 |
|
56 |
|
57 |
|
58 | return toFixed((125 * raw / 65536) - 6, 2);
|
59 | }
|
60 | }
|
61 | },
|
62 |
|
63 | HIH6130: {
|
64 | initialize: {
|
65 | value: function(opts, dataHandler) {
|
66 | var Multi = require("./imu");
|
67 | var driver = Multi.Drivers.get(this.board, "HIH6130", opts);
|
68 | driver.on("data", function(data) {
|
69 | dataHandler(data.humidity);
|
70 | });
|
71 | }
|
72 | },
|
73 | toRelativeHumidity: {
|
74 |
|
75 |
|
76 | value: function(raw) {
|
77 |
|
78 |
|
79 | return toFixed(raw * 100 / (Fn.POW_2_14 - 1), 2);
|
80 | }
|
81 | }
|
82 | },
|
83 |
|
84 | DHT_I2C_NANO_BACKPACK: {
|
85 | initialize: {
|
86 | value: function(opts, dataHandler) {
|
87 | var Multi = require("./imu");
|
88 | var driver = Multi.Drivers.get(this.board, "DHT_I2C_NANO_BACKPACK", opts);
|
89 | driver.on("data", function(data) {
|
90 | dataHandler(data.humidity);
|
91 | });
|
92 | }
|
93 | },
|
94 | toRelativeHumidity: {
|
95 |
|
96 |
|
97 |
|
98 |
|
99 |
|
100 |
|
101 |
|
102 |
|
103 |
|
104 |
|
105 |
|
106 |
|
107 |
|
108 |
|
109 | value: function(raw) {
|
110 | return toFixed(raw / 100, 1);
|
111 | }
|
112 | }
|
113 | },
|
114 |
|
115 | TH02: {
|
116 | initialize: {
|
117 | value: function(opts, dataHandler) {
|
118 | var Multi = require("./imu");
|
119 | var driver = Multi.Drivers.get(this.board, "TH02", opts);
|
120 | driver.on("data", function(data) {
|
121 | dataHandler(data.humidity);
|
122 | });
|
123 | }
|
124 | },
|
125 | toRelativeHumidity: {
|
126 |
|
127 |
|
128 | value: function(raw) {
|
129 | if (raw > 100) {
|
130 | raw = 0;
|
131 | }
|
132 | return toFixed(raw || 0, 2);
|
133 | }
|
134 | }
|
135 | },
|
136 |
|
137 | SI7020: {
|
138 | initialize: {
|
139 | value: function(opts, dataHandler) {
|
140 | var Multi = require("./imu");
|
141 | var driver = Multi.Drivers.get(this.board, "SI7020", opts);
|
142 | driver.on("data", function(data) {
|
143 | dataHandler(data.humidity);
|
144 | });
|
145 | }
|
146 | },
|
147 | toRelativeHumidity: {
|
148 | value: function(raw) {
|
149 |
|
150 |
|
151 |
|
152 |
|
153 |
|
154 | return toFixed((125 * raw / 65536) - 6, 2);
|
155 | }
|
156 | }
|
157 | },
|
158 |
|
159 | BME280: {
|
160 | initialize: {
|
161 | value: function(opts, dataHandler) {
|
162 | var Multi = require("./imu");
|
163 | var driver = Multi.Drivers.get(this.board, "BME280", opts);
|
164 | driver.on("data", function(data) {
|
165 | dataHandler(data.humidity);
|
166 | });
|
167 | }
|
168 | },
|
169 | toRelativeHumidity: {
|
170 | value: function(raw) {
|
171 |
|
172 |
|
173 | return toFixed(raw / 1024, 3);
|
174 | }
|
175 | }
|
176 | }
|
177 | };
|
178 |
|
179 | Controllers.DHT11_I2C_NANO_BACKPACK = Controllers.DHT_I2C_NANO_BACKPACK;
|
180 | Controllers.DHT21_I2C_NANO_BACKPACK = Controllers.DHT_I2C_NANO_BACKPACK;
|
181 | Controllers.DHT22_I2C_NANO_BACKPACK = Controllers.DHT_I2C_NANO_BACKPACK;
|
182 | Controllers.SI7021 = Controllers.SI7020;
|
183 |
|
184 |
|
185 | function Hygrometer(opts) {
|
186 | if (!(this instanceof Hygrometer)) {
|
187 | return new Hygrometer(opts);
|
188 | }
|
189 |
|
190 | var controller = null;
|
191 | var last = null;
|
192 | var raw = null;
|
193 |
|
194 | Board.Component.call(
|
195 | this, opts = Board.Options(opts)
|
196 | );
|
197 |
|
198 | var freq = opts.freq || 25;
|
199 |
|
200 | if (opts.controller && typeof opts.controller === "string") {
|
201 | controller = Controllers[opts.controller.toUpperCase()];
|
202 | } else {
|
203 | controller = opts.controller;
|
204 | }
|
205 |
|
206 | if (controller == null) {
|
207 | throw new Error("Missing Hygrometer controller");
|
208 | }
|
209 |
|
210 | priv.set(this, {});
|
211 |
|
212 | Board.Controller.call(this, controller, opts);
|
213 |
|
214 | if (!this.toRelativeHumidity) {
|
215 | this.toRelativeHumidity = opts.toRelativeHumidity || function(x) {
|
216 | return x;
|
217 | };
|
218 | }
|
219 |
|
220 | var propDescriptors = {
|
221 | relativeHumidity: {
|
222 | get: function() {
|
223 | return this.toRelativeHumidity(raw);
|
224 | }
|
225 | }
|
226 | };
|
227 |
|
228 | propDescriptors.RH = propDescriptors.relativeHumidity;
|
229 |
|
230 | Object.defineProperties(this, propDescriptors);
|
231 |
|
232 | if (typeof this.initialize === "function") {
|
233 | this.initialize(opts, function(data) {
|
234 | raw = data;
|
235 | });
|
236 | }
|
237 |
|
238 | setInterval(function() {
|
239 | if (raw == null) {
|
240 | return;
|
241 | }
|
242 |
|
243 | if (Number.isNaN(this.relativeHumidity)) {
|
244 | return;
|
245 | }
|
246 |
|
247 | var data = {};
|
248 | data.RH = data.relativeHumidity = this.relativeHumidity;
|
249 |
|
250 | this.emit("data", data);
|
251 |
|
252 | if (this.relativeHumidity !== last) {
|
253 | last = this.relativeHumidity;
|
254 | this.emit("change", data);
|
255 | }
|
256 | }.bind(this), freq);
|
257 | }
|
258 |
|
259 | util.inherits(Hygrometer, Emitter);
|
260 |
|
261 |
|
262 | if (!!process.env.IS_TEST_MODE) {
|
263 | Hygrometer.Controllers = Controllers;
|
264 | Hygrometer.purge = function() {
|
265 | priv.clear();
|
266 | };
|
267 | }
|
268 |
|
269 | module.exports = Hygrometer;
|