#include <DHTesp.h>
#include <WiFi.h>
#include <ThingSpeak.h> // Library for ThingSpeak integration
#include <ESP32Servo.h> // Include ESP32Servo library (assuming ESP32 board)
#include <LiquidCrystal.h>


const char* ssid = "Wokwi-GUEST"; // Replace with your Wi-Fi SSID
const char* password = ""; // Replace with your Wi-Fi password

const int DHT_PIN = 12;
DHTesp dhtSensor;

const int servoPin = 2; // Pin connected to the servo motor
Servo servo;



// ThingSpeak settings
unsigned long channelID =  2663950; // Replace with your ThingSpeak channel ID
const char* writeAPIKey = "NPQDZJBSOOHTB4QT"; // Replace with your ThingSpeak write API key

WiFiClient client; // Declare the client object

float highTempThreshold = 30; // Temperature above which pump turns on (in deg C)
float lowTempThreshold = 25;  // Temperature below which pump turns off (in deg C)
float lowMoistureThreshold = 30; // Moisture below which pump turns on (in %)
// Optional: Very high moisture threshold (if needed)
float veryHighMoistureThreshold = 80; // Moisture above which pump might need additional logic (adjust as needed)


const int pirPin = 27; // PIR sensor digital output pin
const int ledPin = 14; // LED pin

const int rs = 5;
const int en = 17;
const int d4 = 16;
const int d5 = 4;
const int d6 = 0;
const int d7 = 15;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int pirState = LOW;
int val;
void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  servo.attach(servoPin); // Attach the servo to the specified pin

  lcd.begin(16, 2);

   // Set PIR sensor pin as input
  pinMode(pirPin, INPUT);

  // Set LED pin as output
  pinMode(ledPin, OUTPUT);

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

  // Initialize ThingSpeak
  ThingSpeak.begin(client);
}

void loop() {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  float temperature = data.temperature;
  float humidity = data.humidity;


   val = digitalRead(pirPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, HIGH);  // turn LED ON
    if (pirState == LOW) {
      // we have just turned on
      Serial.println("Motion detected!");
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW); // turn LED OFF
    if (pirState == HIGH) {
      // we have just turned of
      Serial.println("Motion ended!");
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }
 

  // Print data to serial monitor
  Serial.println("Temp: " + String(temperature, 2) + "deg C");
  Serial.println("Humidity: " + String(humidity, 1) + "%");
  


  // Control servo based on temperature and moisture
  if (temperature > highTempThreshold && humidity < lowMoistureThreshold) {
    servo.write(180); // Set servo to position mimicking pump on (adjust angle as needed)
  } else if (humidity > veryHighMoistureThreshold) {
    // Optional logic for very high moisture (e.g., turn on additional pump or alarm)
    Serial.println("Very high moisture detected!");
    // Add your desired actions here (servo control, notifications, etc.)
  } else {
    servo.write(0); // Set servo to position mimicking pump off (adjust angle as needed)
  }

  

 // Display data and servo state on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(String(temperature, 1));
  lcd.print("degC ");
  lcd.setCursor(0, 1);
  lcd.print("Humid: ");
  lcd.print(String(humidity, 1));
  lcd.print("%  ");
  lcd.print(servo.read() == 180 ? "Pump ON" : "Pump OFF");

  // Send data to ThingSpeak (including moisture if possible)
  ThingSpeak.setField(1, temperature); // Field 1 for temperature
  ThingSpeak.setField(2, humidity); // Field 2 for humidity
  // Add a field for moisture if ThingSpeak supports it (check ThingSpeak documentation)
  // ThingSpeak.setField(3, moisture); // Example (assuming ThingSpeak supports field 3)
  int response = ThingSpeak.writeFields(channelID, writeAPIKey);

  if (response == 200) {
    Serial.println("Data sent to ThingSpeak successfully!");
  } else {
    Serial.println("Error sending data to ThingSpeak. HTTP error code: " + String(response));
  }

  Serial.println("---");
  delay(5000);
}