WiFi ESP8266 and DHT22 Sensor

1#include <ThingSpeak.h>
2
3/* DEVELOPER: hernando Bolanos - Colaborations  - original code and libraries for wifi modules and code uploaded in GITHUB for send  information to Thinhspeak-Libraries according to each author
4 *  
5 *  This  code send to  Thingspeak DHT22 data each 20 seconds -using wifi 
6 *  This program  do not use arduino just use the GPIO2 to receive DHT22 sensor information and demux  it. How to load directly to de esp8266 from arduino IDE is a chellenge- take a look  to the "el profe garcia videos on youtube"
7 */
8#include <DHT.h> //cargamos  la librera DHT
9#define DHTPIN 2 //Seleccionamos el pin en el que se conectar  el sensor
10#define DHTTYPE DHT22 //Se selecciona el DHT22(hay otros DHT)
11DHT  dht(DHTPIN, DHTTYPE); //Se inicia una variable que ser usada por Arduino para comunicarse  con el sensor
12#include <ESP8266WiFi.h>
13
14unsigned long myChannelNumber =  167319;
15const char * myWriteAPIKey = "XXXP9V86RWR7R9Y";
16
17const char*  ssid = "XXXX ";
18const char* password = "XXXX";
19
20 WiFiClient  client;
21//  Create an instance of the server
22// specify the port to listen on as an argument
23WiFiServer  server(80);
24
25void setup() {
26  Serial.begin(115200);
27  delay(10);
28   dht.begin(); //Se inicia el sensor
29
30 
31
32 
33  
34  
35  // Connect  to WiFi network
36  Serial.println();
37  Serial.println();
38  Serial.print("Connecting  to ");
39  Serial.println(ssid);
40  
41  WiFi.begin(ssid, password);
42  
43  while (WiFi.status() != WL_CONNECTED) {
44    delay(500);
45    Serial.print(".");
46  }
47  Serial.println("");
48  Serial.println("WiFi connected");  
49  
50  // Start the server
51 // server.begin();
52 // Serial.println("Server started");
53   
54 
55
56  // Print the IP address
57  Serial.println(WiFi.localIP());
58
59ThingSpeak.begin(client);
60   
61}
62
63void loop() {
64
65float h = dht.readHumidity(); //Se lee la humedad
66  float t = dht.readTemperature(); //Se lee la temperatura
67  //Se imprimen las  variables
68  Serial.println("Humedad: "); 
69  Serial.println(h);
70  Serial.println("Temperatura:  ");
71  Serial.println(t);
72  delay(2000); //Se espera 2 segundos para seguir  leyendo //datos
73 
74
75ThingSpeak.writeField(myChannelNumber, 1, h, myWriteAPIKey);
76  delay(20000); 
77  
78
79ThingSpeak.writeField(myChannelNumber, 2, t, myWriteAPIKey);
80  delay(20000); 
81  
82  
83
84
85 
86   }
87 
88    
89  
90  
91 
92