2.3 Code

Let’s start coding!!

Complete Code:

#include <DHT.h> // Including library for dht
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <Wire.h>
String apiKey = “FWOMRH9H84HPNB5I”; // Enter your Write API key from ThingSpeak
const char *ssid = “realme 3i”; // replace with your wifi ssid and wpa2 key
const char *pass = “YADAV ji”;
const char* server = “api.thingspeak.com”;
#define DHTPIN 0 //pin where the dht11 is connected
DHT dht(DHTPIN, DHT11);
WiFiClient client;
void setup()
{ Serial.begin(115200);
delay(10);
dht.begin();
Serial.println(“Connecting to “);
Serial.println(ssid);
WiFi.begin(ssid, pass);
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(1000);
}