#include <Wire.h>
#include <DHTesp.h>
#include <AccelStepper.h>
#include <LiquidCrystal_I2C.h>

#define DHTPIN 15
#define GAS_LEVER 34
#define buzzer 13
#define TRIG_PIN 5
#define ECHO_PIN 18

DHTesp dhtsensor;
float duration_us, distance_cm;
const int motionSensor = 13; // Adjusted to a compatible pin for attachInterrupt

AccelStepper stepper(AccelStepper::DRIVER, 19, 2, 4, 23);  // Adjust pins as per your setup

// Initialize the LCD display using LiquidCrystal_I2C library
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Adjust the I2C address if needed

void setup() {
    Serial.begin(115200);
    Serial.println("ESP32 collecting sensors data");

    pinMode(TRIG_PIN, OUTPUT);
    pinMode(ECHO_PIN, INPUT);
    pinMode(motionSensor, INPUT_PULLUP);
    attachInterrupt(digitalPinToInterrupt(motionSensor), detectsMovement, RISING);

    dhtsensor.setup(DHTPIN, DHTesp::DHT22);

    pinMode(GAS_LEVER, INPUT);
    pinMode(buzzer, OUTPUT);
    lcd.init();                     
    // Print a message to the LCD.
    lcd.backlight();
    lcd.print("Sensor Data:");

}

void loop() {
    TempAndHumidity data = dhtsensor.getTempAndHumidity();
    float t = data.temperature;
    float h = data.humidity;
    float g = map(int(analogRead(GAS_LEVER)), 0, 4095, 200, 2000);


    lcd.setCursor(0,0);
    lcd.println("Temp: " + String(data.temperature, 2) + "*C");
    lcd.setCursor(0,1);
    lcd.println("Humidity: " + String(data.humidity, 1) + "%");
    lcd.println("---");

    digitalWrite(TRIG_PIN, LOW);
    delayMicroseconds(2);
    digitalWrite(TRIG_PIN, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIG_PIN, LOW);
    long duration = pulseIn(ECHO_PIN, HIGH);
    distance_cm = (duration / 2) / 29.09;
    Serial.println(distance_cm);

    if (distance_cm >= 100) {
        Serial.println("The tank is full");
    } else if (distance_cm >= 50 && distance_cm < 100) {
        Serial.println("The tank is at 50% of capacity");
    } else if (distance_cm >= 20 && distance_cm < 50) {
        Serial.println("The tank is near to empty");
    } else {
        Serial.println("The tank is empty");
    }
    delay(3000);

    Serial.println("Temp: " + String(data.temperature, 2) + "C");
    Serial.println("Humidity: " + String(data.humidity, 1) + "%");
    Serial.println("---");

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp: " + String(data.temperature, 2) + "C");
    lcd.setCursor(0, 1);
    lcd.print("Humidity: " + String(data.humidity, 2) + "%");
    delay(2000);


    if (g > 500 | t > 35) {
        tone(buzzer, 1000);
        stepper.moveTo(1000);
        stepper.runToPosition();
    } else {
        noTone(buzzer);
    }

    delay(1000);
}

void detectsMovement() {
    Serial.println("Motion Detected!!!");
    delay(2000);  // Add a delay to avoid multiple trigger events
}