#define Valve1 13
#define Valve2 12
#define Valve3 11
#define Valve4 10
#define Valve5 9
#define Valve6 8

#define Light1 7
#define Light2 6
#define Light3 5
#define Light4 4
#define Light5 3
#define Light6 2

#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

double flow_v1 = 0;
double flow_v2 = 0;
double flow_v3 = 0;
double flow_v4 = 0;
double flow_v5 = 0;
double flow_v6 = 0;
double total_flow = 0;

int ButtonState = 0;
int lastButtonState = 0;



void setup() {
  pinMode(Valve1, INPUT_PULLUP);
  pinMode(Valve2, INPUT_PULLUP);
  pinMode(Valve3, INPUT_PULLUP);
  pinMode(Valve4, INPUT_PULLUP);
  pinMode(Valve5, INPUT_PULLUP);
  pinMode(Valve6, INPUT_PULLUP);

  
  lcd.init();
  lcd.backlight();

  // Print something
  lcd.setCursor(1, 0);
  lcd.print("Flow rate in LPM:");


  
}

void loop() {








  int button_value1 = digitalRead((Valve1));
  if (button_value1 == HIGH) {
    digitalWrite(Light1, HIGH);
    flow_v1 = 8;
    delay(10);
  }
  else {
    digitalWrite(Light1, LOW);
    flow_v1 = 0;
    delay(10);
  }
  
  int button_value2 = digitalRead((Valve2));
  if (button_value2 == HIGH) {
    digitalWrite(Light2, HIGH);
    flow_v2 = 8;
    delay(10);
  }
  else {
    digitalWrite(Light2, LOW);
    flow_v2 = 0;
    delay(10);
  }

  int button_value3 = digitalRead((Valve3));
  if (button_value3 == HIGH) {
    digitalWrite(Light3, HIGH);
    flow_v3 = 8;
    delay(10);
  }
  else {
    digitalWrite(Light3, LOW);
    flow_v3 = 0;
    delay(10);
  }

  int button_value4 = digitalRead((Valve4));
  if (button_value4 == HIGH) {
    digitalWrite(Light4, HIGH);
    flow_v4 = 8;
    delay(10);
  }
  else {
    digitalWrite(Light4, LOW);
    flow_v4 = 0;
    delay(10);
  }

  int button_value5 = digitalRead((Valve5));
  if (button_value5 == HIGH) {
    digitalWrite(Light5, HIGH);
    flow_v5 = 8;
    delay(10);
  }
  else {
    digitalWrite(Light5, LOW);
    flow_v5 = 0;
    delay(10);
  }

  int button_value6 = digitalRead((Valve6));
  if (button_value6 == HIGH) {
    digitalWrite(Light6, HIGH);
    flow_v6 = 8;
    delay(10);
    }
  else {
    digitalWrite(Light6, LOW);
    flow_v6 = 0;
    delay(10);
  }


  ButtonState = digitalRead(Valve1);
  if (ButtonState == lastButtonState) {
    double total_flow = flow_v1 + flow_v2 + flow_v3 + flow_v4 + flow_v5 + flow_v6;
    lcd.clear();
    lcd.setCursor(1, 0);
    lcd.print("Flow rate in LPM:");
    lcd.setCursor(9, 3);
    lcd.print(total_flow);
    delay(100);
  }
  lastButtonState = ButtonState;


}