#include <WiFi.h>
#include <HTTPClient.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "wc6wdb9dvn";

const char* server = "hhtp://api.thingspeak.com/update";
String apikey = "XP5CDGPG1R7KS2ZA";
 
int potPin = 34;   //Potentiometer pin (ADC)    

unsigned long lastSendTime = 0;
const unsigned long sendInterval = 5000; // Send to ThingSpeak every 5 s

void setup() {
  Serial.begin(115200);
  delay(10);
  
  // Connect to WiFi
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WIFI");
  while(WiFi.status() !=WL_CONNECTED) {
    delay(300);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");
}

void loop() {
  int sensorValue = analogRead(potPin); // 0 to 4095

  // Show value in Serial Monitor
  Serial.print("Potentiometer Value: ");
  Serial.print(sensorValue);
  delay(2000);

 // Send to ThinSpeak every 5 seconds
  if (millis() - lastSendTime >= sendInterval) {
    if(WiFi.status() == WL_CONNECTED) {
      HTTPCLIENT http;
      String url= String(server) + "?api_key=" + apikey + "&feild1" + String(sensorValue);
      http.begin(url);
      int responseCode = http.GET();
      if (responsecode > 0) {
        Serial.print("Thingspeak response code: ");
        Serial.print(responseCode);
      } else {
        Serial.print("Error sending data. Code: ");
        Serial.println(responseCode);
      }  
      http.end();
    }
    lastSendTime = millis();
  }
  delay(30); // small delay for smoother updates
}