Added two new accessories for a readonly thermometer and hygrometer (humidity meter) based on HttpAccessory.

accessories/HttpHygrometer.js

@@ -0,0 +1,71 @@
+var Service = require("HAP-NodeJS").Service;
+var Characteristic = require("HAP-NodeJS").Characteristic;
+var request = require("request");
+
+module.exports = {
+  accessory: HygrometerAccessory
+}
+
+function HygrometerAccessory(log, config) {
+  this.log = log;
+
+  // url info
+  this.url = config["url"];
+  this.http_method = config["http_method"];
+}
+
+
+HygrometerAccessory.prototype = {
+
+  httpRequest: function(url, method, callback) {
+    request({
+      url: url,
+      method: method
+    },
+    function (error, response, body) {
+      callback(error, response, body)
+    })
+  },
+
+
+  identify: function(callback) {
+    this.log("Identify requested!");
+    callback(); // success
+  },
+
+  getCurrentRelativeHumidity: function (callback) {
+    var that = this;
+    that.log ("getting CurrentCurrentRelativeHumidity");
+
+    this.httpRequest(this.url, this.http_method, function(error, response, body) {
+      if (error) {
+        this.log('HTTP function failed: %s', error);
+        callback(error);
+      }
+      else {
+        this.log('HTTP function succeeded - %s', body);
+        callback(null, Number(body));
+      }
+    }.bind(this));
+  },  
+
+  getServices: function() {
+
+    // you can OPTIONALLY create an information service if you wish to override
+    // the default values for things like serial number, model, etc.
+    var informationService = new Service.AccessoryInformation();
+    
+    informationService
+      .setCharacteristic(Characteristic.Manufacturer, "HTTP Manufacturer")
+      .setCharacteristic(Characteristic.Model, "HTTP Hygrometer")
+      .setCharacteristic(Characteristic.SerialNumber, "HTTP Serial Number");
+    
+    var humidityService = new Service.HumiditySensor();
+
+    humidityService
+	.getCharacteristic(Characteristic.CurrentRelativeHumidity)
+	.on('get', this.getCurrentRelativeHumidity.bind(this));
+    
+    return [informationService, humidityService];
+  }
+};