#define BLYNK_TEMPLATE_ID "TMPL6NBp1q1LA"
#define BLYNK_TEMPLATE_NAME "CHEMTEC"
#define BLYNK_AUTH_TOKEN "BRfkThKIxUciVDBKIj_82Pkdbs1fW5LZ"
#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
#define redPin 2     // Red LED pin
#define greenPin 4 // Green LED pin

char auth[] = BLYNK_AUTH_TOKEN ; 
char ssid[] = "Wokwi-GUEST"; 
char pass[] = "";
LiquidCrystal_I2C lcd(0x27, 16, 2);
BlynkTimer timer;

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  Serial.println("Water Quality Analyzer");
  Wire.begin(21, 22);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(1, 0);
  lcd.print("Water Quality ");
  lcd.setCursor(4, 1);
  lcd.print("Analyzer");
  delay(5000);
  lcd.clear();
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  // Set the pinMode for sensor pins in the setup() function.
  pinMode(32, INPUT);
  pinMode(34, INPUT);
  pinMode(35, INPUT);
}

void loop() {
  Blynk.run(); 
  // Read EC
  int elConductivity = analogRead(32);
  float ec = map(elConductivity, 0, 1023, 0, 2000);

  // Read TDS
  int Turb1 = analogRead(34);
  float Turb = map(Turb1, 0, 1023, 0, 10);

  // Read pH
  int PH = analogRead(35);
  float PH1 = map(PH, 0, 1023, 0, 14);

  Serial.print("EC: ");
  Serial.println(ec);
  Serial.print("Turbidity: ");
  Serial.println(Turb);
  Serial.print("pH: ");
  Serial.println(PH1);

  lcd.setCursor(1, 0);
  lcd.print("EC: ");
  lcd.print(ec);
  Blynk.virtualWrite(V0, ec);
  delay(1000);
  lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print("Turbidity: ");
  lcd.print(Turb);
  Blynk.virtualWrite(V1, Turb);
  delay(1000);
  lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print("pH: ");
  lcd.print(PH1);
  Blynk.virtualWrite(V2, PH1);
  delay(1000);
  lcd.clear();

    if (ec >= 1000 && ec <= 1200 && Turb >=0 && Turb <= 10 && PH1 >= 6.5 && PH1 <= 7.5){
    digitalWrite(greenPin, HIGH);
    digitalWrite(redPin, LOW);
    Blynk.virtualWrite(V3, HIGH);
    Blynk.virtualWrite(V4, LOW);
    Serial.print("No treatment is needed!");
    lcd.setCursor(2, 0);
    lcd.print("No treatment");
    lcd.setCursor(3, 1);
    lcd.print("is needed!");
    delay(1000);
    lcd.clear();
  }
  else {
    digitalWrite(greenPin, LOW);
    digitalWrite(redPin, HIGH);
    Blynk.virtualWrite(V3, LOW);
    Blynk.virtualWrite(V4, HIGH);
    Serial.print("Treatment is needed!");
    lcd.setCursor(3, 0);
    lcd.print("Treatment");
    lcd.setCursor(3, 1);
    lcd.print("is needed!");
    delay(1000);
    lcd.clear();
  }
}