#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int flowSensorPin = A0; // analog pin for the flow sensor
float flowRate; // flow rate in liters per minute
float totalFlow; // total flow in liters
unsigned long timeElapsed; // time elapsed since last flow calculation
unsigned long oldTime; // old time in milliseconds
bool wifiConnected = false;

void setup() {
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Waiting for");
  lcd.setCursor(0, 1);
  lcd.print("Wi-Fi connection");

  // Simulating Wi-Fi connection delay
  delay(4000);
  lcd.setCursor(0,0);
  lcd.print("Connected to ");
  lcd.setCursor(0,1);
  lcd.print("wifi");

  delay(2000);

  // Simulating successful Wi-Fi connection
  wifiConnected = true;

  // Initialize flow calculation variables
  timeElapsed = 0;
  oldTime = millis();
}

void loop() {
  if (wifiConnected) {
    int rawFlow = analogRead(flowSensorPin); // read the analog input from the flow sensor
    flowRate = (rawFlow / 1024.0) * 5.0 / 2.25; // convert the raw flow reading to liters per minute
    totalFlow += flowRate * timeElapsed / 60000.0; // calculate the total flow based on the flow rate and time elapsed
    timeElapsed = millis() - oldTime; // calculate the time elapsed since the last flow calculation
    oldTime = millis(); // store the current time for the next flow calculation
    lcd.setCursor(0, 0);
    lcd.print("Flow rate: ");
    lcd.print(flowRate, 2); // display the flow rate value on the LCD display with two decimal places
    lcd.print(" L/min");
    lcd.setCursor(0, 1);
    lcd.print("Total flow: ");
    lcd.print(totalFlow, 2); // display the total flow value on the LCD display with two decimal places
    lcd.print(" L");
  }
  else {
    lcd.setCursor(0, 0);
    lcd.print("Waiting for");
    lcd.setCursor(0, 1);
    lcd.print("Wi-Fi connection");
  }

  delay(500);
}