ThingSpeak Cloud || Data send to Cloud using Arduino / ESP 32 || IoT Project|| IoT Experiment

 #include <WiFi.h>

#include <HTTPClient.h>

int x=0;

// Set our wifi name and password

const char* ssid = "MClasses";

const char* password = "12345678";

String serverName = "https://api.thingspeak.com/update?api_key=XXXXXXXXXXXXXX&field1=0";

unsigned long lastTime = 0;

unsigned long timerDelay = 60000;

void setup() {

  pinMode(34,INPUT);

  Serial.begin(9600); // Opens up the serial port with a baudrate of 9600 bits per second

  WiFi.begin(ssid, password); // Attempt to connect to wifi with our password

  Serial.println("Connecting"); // Print our status to the serial monitor

  // Wait for wifi to connect

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

    delay(500);

    Serial.print(".");

  }

  Serial.println("");

  Serial.print("Connected to WiFi network with IP Address: ");

  Serial.println(WiFi.localIP());

}

void loop() {

  if ((millis() - lastTime) > timerDelay) { // Check if its been a minute

    if(WiFi.status()== WL_CONNECTED){ // Check to make sure wifi is still connected

      x= analogRead(34);

      sendData(x); // Call the sendData function defined below

    }

    else {

      Serial.println("WiFi Disconnected");

    }

    lastTime = millis();

  }

}

void sendData(int dta){

  HTTPClient http; // Initialize our HTTP client

Serial.println(dta);

  String url = serverName + "&field1=" + dta; // Define our entire url

      

  http.begin(url.c_str()); // Initialize our HTTP request

      

  int httpResponseCode = http.GET(); // Send HTTP request

      

  if (httpResponseCode > 0){ // Check for good HTTP status code

    Serial.print("HTTP Response code: ");

    Serial.println(httpResponseCode);

  }else{

    Serial.print("Error code: ");

    Serial.println(httpResponseCode);

  }

  http.end();

}