#include <Ultrasonic.h> 
#include <OneWire.h>
#include <DallasTemperature.h>
#include <WiFi.h>
#include <HTTPClient.h>

// Servo Motor (Automatic Feeder)
#define SERVO_PIN 13
int servoAngle = 0;

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

// ThingSpeak API details
const char* server = "http://api.thingspeak.com/update";
String apiKey = "XGDQDH1R36T0UNH2";

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);
  
  // Initialize servo motor using analogWrite
  pinMode(SERVO_PIN, OUTPUT);

  // Connect to WiFi
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("Connected!");
}

void loop() {
  // Fixed Water Level (e.g., 100 cm)
  long waterLevel = 100;
  Serial.print("Water Level: ");
  Serial.println(waterLevel);

  // Fixed Water Temperature (e.g., 25.0 °C)
  float waterTemp = 25.0;
  Serial.print("Water Temperature: ");
  Serial.println(waterTemp);

  // Control the Feeder (Simple Schedule or Condition-based)
  static unsigned long lastFeedTime = 0;
  if (millis() - lastFeedTime > 60000) { // Feed every minute
    servoAngle = 90; // Set angle to 90 degrees
    int dutyCycle = map(servoAngle, 0, 180, 0, 255); // Convert angle to duty cycle for analogWrite
    analogWrite(SERVO_PIN, dutyCycle);
    delay(1000); // Hold position
    servoAngle = 0; // Return to 0 degrees
    dutyCycle = map(servoAngle, 0, 180, 0, 255);
    analogWrite(SERVO_PIN, dutyCycle);
    lastFeedTime = millis();
    Serial.println("Feeding the fish...");
  }

  // Send data to ThingSpeak
  if(WiFi.status() == WL_CONNECTED){
    HTTPClient http;
    String url = String(server) + "?api_key=" + apiKey + "&field1=" + String(waterLevel) + "&field2=" + String(waterTemp);
    http.begin(url);
    int httpResponseCode = http.GET();
    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println("Data sent to ThingSpeak: " + response);
    } else {
      Serial.println("Error in sending data to ThingSpeak");
    }
    http.end();
  }
  
  // Delay before next loop
  delay(1000);
}