IOT LAB EXP3 PROGRAM

 #include <ESP8266WiFi.h>

 #include <ThingSpeak.h>

 #include <DHT.h>

 #define DHTPIN 4

 #define DHTTYPE DHT11

 const char* ssid = "PLACEMENTDRIVE";

 // Replace with your Wi-Fi SSID

 const char* password = "specplacements"; // Replace with your Wi-Fi password

 unsigned long ch_id = 2995467; // Replace with your ThingSpeak Channel ID

 const char* apiKey = "EW2AWHPQ8QW31G1V"; // Replace with your ThingSpeak API Key

 DHT dht(DHTPIN, DHTTYPE);

 WiFiClient client;

 

 void setup() {

 Serial.begin(9600);

 dht.begin();

 WiFi.begin(ssid, password);

 while (WiFi.status() != WL_CONNECTED) {

 delay(500);

 Serial.print(".");

 }

 Serial.println("WiFi connected");

 ThingSpeak.begin(client);

 }

 void loop() {

 

 float h = dht.readHumidity();

 float t = dht.readTemperature();

 if (isnan(h) || isnan(t)) {

 Serial.println("Failed to read from DHT sensor!");

 return;

 }

 int httpCode = ThingSpeak.writeField(ch_id, 1, "Chandu:"+String(h)+","+String(t), apiKey);

 

 if(httpCode == 200){

 Serial.println("Channel write successful.");

 }else{

 Serial.println("Problem writing to channel. HTTP error code " + String(httpCode) );

 }

 delay(20000); // Wait 20 seconds before next reading

 }