//
// Plot DTH22 data on thingspeak.com using an ESP8266
// April 11 2015
// Author: Jeroen Beemster
// Website: www.arduinesp.com

#include <DHT.h>
#include <ESP8266WiFi.h>

// replace with your channel's thingspeak API key,
String apiKey = "BWAUP5A38C3KLFJA";
const char* ssid = "10FX11111580";
const char* password = "password";

const char* server = "api.thingspeak.com";
#define DHTPIN 2 // what pin we're connected to

DHT dht(DHTPIN, DHT22,15);
WiFiClient client;

void setup() {
  Serial.begin(115200);
  delay(10);
  dht.begin();

  WiFi.begin(ssid, password);

  Serial.println();
  Serial.println();
  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");

}

void loop() {

  float h = dht.readHumidity();
  float t = dht.readTemperature();
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  if (client.connect(server,80)) {  //   "184.106.153.149" or api.thingspeak.com
    String postStr = apiKey;
           postStr +="&field1=";
           postStr += String(t);
           postStr +="&field2=";
           postStr += String(h);
           postStr += "\r\n\r\n";

     client.print("POST /update HTTP/1.1\n");
     client.print("Host: api.thingspeak.com\n");
     client.print("Connection: close\n");
     client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n");
     client.print("Content-Type: application/x-www-form-urlencoded\n");
     client.print("Content-Length: ");
     client.print(postStr.length());
     client.print("\n\n");
     client.print(postStr);

     Serial.print("Temperature: ");
     Serial.print(t);
     Serial.print(" degrees Celcius Humidity: ");
     Serial.print(h);
     Serial.println("% send to Thingspeak");
  }
  client.stop();

  Serial.println("Waiting...");
  // thingspeak needs minimum 15 sec delay between updates
  delay(20000);
};