#include <WiFi.h> 
#include <DHT.h> 
#define DHTPIN 5                   // DHT data pin connected to ESP32 pin 5 
#define DHTTYPE DHT11              
// DHT11 (DHT Sensor Type) 
#define SSID "6005"          
#define PASS "12345678"            
      //
 WiFi Name 
// Password 
#define WRITE_API_KEY "JJ98J2RWY7I3S9HX" // ThingSpeak Write API key 
#define READ_API_KEY "AT8KEV6YJXCZ35SP" // ThingSpeak Read API key (for private channels) 
#define CHANNEL_ID "2713998"     // ThingSpeak Channel ID 
#define THINGSPEAK_URL "api.thingspeak.com" 
DHT dht(DHTPIN, DHTTYPE);        
void setup() { 
Serial.begin(115200);     
     //
  // Initialize the DHT sensor 
 Start Serial Monitor 
dht.begin();                 
  // Initialize DHT sensor 
WiFi.begin(SSID, PASS);      
  // Connect to WiFi 
Serial.print("Connecting to WiFi"); 
unsigned long startAttemptTime = millis(); 
// Check connection with a timeout 
while (WiFi.status() != WL_CONNECTED && millis() - startAttemptTime < 10000) { 
delay(500); 
Serial.print("."); 
} 
if (WiFi.status() == WL_CONNECTED) { 
Serial.println("\nConnected to WiFi"); 
} else { 
Serial.println("\nFailed to connect to WiFi"); 
} 
} 
void readDataFromThingSpeak() { 
// Prepare HTTP request URL for reading data 
String url = "/channels/" + String(CHANNEL_ID) + "/fields/1.json?api_key=" + 
String(READ_API_KEY) + "&results=1"; 
Serial.print("Requesting data from ThingSpeak: "); 
Serial.println(url); 
// Read data from ThingSpeak 
WiFiClient client; 
if (client.connect(THINGSPEAK_URL, 80)) { 
client.print("GET " + url + " HTTP/1.1\r\n"); 
client.print("Host: " THINGSPEAK_URL "\r\n"); 
client.print("User-Agent: ESP32Client\r\n"); 
client.print("Connection: close\r\n\r\n"); 
// Wait for a response from the server 
while (client.available() == 0) { 
delay(100); 
} 
// Parse and display the response 
String response = ""; 
while (client.available()) { 
response += client.readStringUntil('\n'); 
} 
Serial.println("Response from ThingSpeak:"); 
Serial.println(response); 
// Optional: Parse JSON response if needed 
// You can use the ArduinoJson library for more complex JSON parsing 
} else { 
Serial.println("Failed to connect to ThingSpeak"); 
} 
client.stop(); // Close the connection 
} 
void loop() { 
// Read temperature and humidity 
float temp = dht.readTemperature(); 
float hum = dht.readHumidity(); 
// Check if reading was successful 
if (isnan(temp) || isnan(hum)) { 
Serial.println("Failed to read from DHT sensor!"); 
return; 
} 
// Read data from ThingSpeak 
readDataFromThingSpeak(); 
// Wait before the next cycle 
delay(40000); // Total delay of 60 seconds 
}