#include <WiFi.h>
#include <HTTPClient.h>
#include <ESP32Servo.h>

Servo myServo;

// WiFi credentials
const char* ssid = "Wokwi-GUEST";   // or your WiFi
const char* password = "";

// ThingSpeak
String apiKey = "TUSV7NT31EFEZXJE";
const char* server = "http://api.thingspeak.com/update";

// Pins
const int sensorPin = 34;
const int servoPin = 18;

void setup() {
  Serial.begin(115200);

  myServo.attach(servoPin);

  // WiFi connect
  WiFi.begin(ssid, password);

  Serial.print("Connecting to WiFi");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWiFi Connected!");
  Serial.println(WiFi.localIP());
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {

    int sensorValue = analogRead(sensorPin);

    int angle = map(sensorValue, 0, 4095, 0, 180);
    myServo.write(angle);

    Serial.print("Sensor: ");
    Serial.print(sensorValue);
    Serial.print(" | Angle: ");
    Serial.println(angle);

    // Send to ThingSpeak
    HTTPClient http;

    String url = String(server) +
                 "?api_key=" + apiKey +
                 "&field1=" + String(sensorValue) +
                 "&field2=" + String(angle);

    http.begin(url);

    int response = http.GET();

    if (response > 0) {
      Serial.println("Data sent to ThingSpeak");
    } else {
      Serial.println("Failed to send data");
    }

    http.end();
  }

  delay(15000); // IMPORTANT for ThingSpeak
}