#define BLYNK_TEMPLATE_ID           "TMPL6sSTSU4i5"
#define BLYNK_TEMPLATE_NAME         "Green House Automation System"
#define BLYNK_AUTH_TOKEN            "AWqFckllrZYAx4vgFjEW3oefqi212ERs"

#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32_SSL.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define DHTPIN 32
#define DHTTYPE DHT22 // DHT 22
DHT dht(DHTPIN, DHTTYPE);

const int LDR_PIN = 35;
const int relayPin1 = 19;
const int relayPin2 = 18;
const int relayPin3 = 17;
const int relayPin4 = 16;
const int relayPin5 = 4;

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 columns, 2 rows

BlynkTimer timer;

void myTimerEvent() {
    // You can send any value at any time.
    // Please don't send more than 10 values per second.
    int potValue = analogRead(34);
    Blynk.virtualWrite(V2, potValue);
}

void sendSensor() {
    // Add your sensor sending code here
}

BLYNK_WRITE(V3) {
    int pinValue = param.asInt(); // assigning incoming value from pin V1 to a variable
    // You can also use:
    // String i = param.asStr();
    // double d = param.asDouble();
    Serial.print("V3 Motor status: ");
    Serial.println(pinValue);
    digitalWrite(18, pinValue);
}

void setup() {
    // put your setup code here, to run once:
    pinMode(relayPin1, OUTPUT);
    pinMode(relayPin2, OUTPUT);
    pinMode(relayPin3, OUTPUT);
    pinMode(relayPin4, OUTPUT);
    pinMode(relayPin5, OUTPUT);

    pinMode(LDR_PIN, INPUT);

    Serial.begin(115200);
    lcd.init(); // initialize the lcd
    lcd.backlight();
    Serial.println("Hello, ESP32!");
    Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

    dht.begin();

    timer.setInterval(1000L, sendSensor);
    timer.setInterval(1000L, myTimerEvent);
}

void CO2Level() {
    int16_t z = analogRead(25);
    String msg1 = z < 800 ? "Low" : z > 1000 ? "YES" : "OK";
    lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print("CO2: ");
    lcd.print(msg1);
    lcd.setCursor(0, 0);
    lcd.print("GAS Active");
    delay(1000); // print message at (0, 0)

    if (z < 800) {
        digitalWrite(relayPin1, LOW);
    } else {
        digitalWrite(relayPin1, HIGH);
    }
}

void MoistureLevel() {
    int16_t i = analogRead(34);
    String msg = i < 2165 ? "WET" : i > 3135 ? "DRY" : "OK";
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Soil: ");
    lcd.print(msg);
    delay(1000); // print message at (0, 0)

    if (i < 3135) {
        digitalWrite(relayPin2, LOW);
        delay(500);
    } else if (i > 3500) {
        digitalWrite(relayPin2, HIGH);
        delay(500);
    }
}

void PhLevel() {
    int16_t p = analogRead(33);
    lcd.clear();
    lcd.setCursor(10, 0);
    lcd.print("PH: ");
    lcd.print(String(p));
    delay(1000); // print message at (0, 0)
    lcd.println("");
    Blynk.virtualWrite(V4, p);

    if (p < 8) {
        digitalWrite(relayPin3, LOW);
        delay(500);
    } else if (p > 7) {
        digitalWrite(relayPin3, HIGH);
        delay(500);
    }
}

void loop() {
    // put your main code here, to run repeatedly:
    float h = dht.readHumidity();
    float temp = dht.readTemperature();

    if (isnan(h) || isnan(temp)) {
        Serial.println("Failed to read from DHT sensor!");
    } else {
        if (temp < 27) {
            digitalWrite(relayPin5, LOW);
        } else {
            digitalWrite(relayPin5, HIGH);
        }

        Blynk.virtualWrite(V1, h);
        Blynk.virtualWrite(V0, temp);
    }

    int sensorValue = analogRead(LDR_PIN); // Read the LDR value (0-4095)
    int brightness = map(sensorValue, 0, 4095, 0, 255); // Map to LED brightness (0-255)

    if (sensorValue < 1000) {
        digitalWrite(relayPin4, LOW);
        delay(500);
    } else if (sensorValue > 2000) {
        digitalWrite(relayPin4, HIGH);
        delay(500);
    }

    Serial.print("Humidity: ");
    Serial.print(h);
    Serial.print("  |  ");
    Serial.print("Temperature: ");
    Serial.print(temp);
    Serial.print("°C  ~  ");
    Serial.print("PH: ");
    Serial.print(analogRead(33));
    Serial.print("  |  ");
    Serial.print("CO2: ");
    Serial.print(800); // Replace 800 with actual CO2 value if available
    delay(1000);
    Serial.println("");
    
    

    CO2Level();
    MoistureLevel();
    PhLevel();

    Blynk.run();
    timer.run();
}