Added support for float values

examples/simple_pubblish/simple_pubblish.ino

@@ -54,4 +54,4 @@ void loop() {
     lastRequest = now;
   }
   delay(10);
-}
+}

examples/simple_pubblish_dht/simple_pubblish_dht.ino

@@ -0,0 +1,75 @@
+/*
+ *  This sketch is a basic example to send data on emoncms.org due to the
+ *  Arduino_EmonCMS library.
+ *
+ *  at the moment the data published are random value,
+ *  substitute the data1 and data2 with your measure
+ *  written by Giacomo Leonzi
+ */
+
+// Define DHT Sensor Libraries
+#include "DHT.h"
+#define DHTTYPE     DHT21                   // Define the temperature sensor type 
+#define DHTPIN      14
+DHT dht(DHTPIN, DHTTYPE, 30);
+
+#include <Emoncms.h>
+// Include framework code and libraries
+#include <ESP8266WiFi.h>
+#include <ESP8266WebServer.h>
+#include <ESP8266mDNS.h>
+#include <EEPROM.h>
+#include <WiFiUdp.h>
+#include <ArduinoOTA.h>
+
+#define APIKEY        "xxxxx"  // replace your emoncms apikeywrite here
+#define HTTPPORT 80            // change this value to point at a local
+#define HOST "emoncms.org"     //installation of the platform emoncms.org
+
+const char* ssid     = "xxx";  // SSID name
+const char* password = "xxx";  // SSID password
+
+// set up net client info:
+const unsigned long postingInterval = 10000;  //delay between updates to emoncms.com
+unsigned long lastRequest = 0;      // when you last made a request
+
+// Temperature and humidity
+float h=0,t=0;
+WiFiClient client;
+Emoncms emoncms;  //Initialize the object
+
+void setup() {
+ emoncms.begin(HOST, HTTPPORT, APIKEY,client);
+  Serial.begin(115200);
+  delay(10);
+
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void loop() {
+
+  int data1 = int(random(0, 30));     //replace this value with your
+  int data2 = int(random(50, 100));   //measure
+  long now = millis();
+  if (now - lastRequest >= postingInterval) {
+    // Reading temperature or humidity takes about 250 milliseconds!
+    h = dht.readHumidity();
+    t = dht.readTemperature();
+
+    emoncms.addValue("h", h);
+    emoncms.addValue("t", t);
+    Serial.println(emoncms.publish());  //open the connection and publish
+    lastRequest = now;
+  }
+  delay(10);
+}

src/Emoncms.cpp

@@ -48,6 +48,19 @@ void Emoncms::addValue(String key, int value)  {
 	_jsonString += value;
 }
 
+/*************************************************************************************
+* addValue - function to build the string json format to comunicate with emoncms.org*
+* you need to give a name value colled key and it's value in a float variable				 *
+************************************************************************************/
+
+void Emoncms::addValue(String key, float value)  {
+
+	if(_jsonString!="")_jsonString +=",";//add the comma only when is not the first or only data added
+	_jsonString += key;
+	_jsonString += ":";
+	_jsonString += String(value);
+}
+
 /*************************************************************************************
 * publish - function to publish on emoncms.org the data measured                  *
 * this function build the string to send, open the comunication through the server  *

src/Emoncms.h

@@ -33,7 +33,9 @@ Emoncms();
 
 void begin(String host, int port, String APIKEY,Client& _client);
 
-	void addValue(String, int); //need key, name of parameter measured, and its value
+	void addValue(String, int);   //need key, name of parameter measured, and its value
+	void addValue(String, float); //need key, name of parameter measured, and its value
+
 	String publish();//publish
 
   private: