#include <CD74HC4067.h>
#include <LiquidCrystal_I2C.h>
#include <Stepper.h>

CD74HC4067 mux(26, 25, 33, 32);

int stepsPerRevolution = 200;


Stepper myStepper(stepsPerRevolution, 18, 19, 5, 17); 
LiquidCrystal_I2C lcd(0x27, 22, 21);
const float GAMMA = 0.7;
const float RL10 = 50;


void setup() {
  Serial.begin(9600);
  pinMode(2, INPUT_PULLUP);
  pinMode(16, INPUT_PULLUP);
  pinMode(4, OUTPUT);
  pinMode(18,OUTPUT);  pinMode(19,OUTPUT);
  pinMode(5,OUTPUT);  pinMode(17,OUTPUT);
  
  lcd.init();
  lcd.backlight();

}

void loop() {
  digitalWrite(4,digitalRead(2));

  for(int i = 0; i < 16; ++i)
  {
    mux.channel(i);
    int analogValue = analogRead(27);
    float voltage = analogValue / 1024. * 5;
    float resistance = 2000 * voltage / (1 - voltage / 5);
    float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
    
    lcd.setCursor(4, 2);
    lcd.print("    ");
    
    Serial.println(analogRead(27));
    delay(1);
    
    lcd.setCursor(4, 2);
    lcd.print(analogRead(27));
    //delay(1);
  }

  if (digitalRead(16)==1){
    myStepper.setSpeed(analogRead(14));
    myStepper.step(stepsPerRevolution);
    delay(1);
  } 

  lcd.setCursor(2, 0);
  if(digitalRead(16)==1){
    lcd.print("Engine ON ");
  } else{
    lcd.print("Engine OFF");
  }

  lcd.setCursor(2, 1);
  if (digitalRead(4)==1){
    lcd.print("Lasers ON "); 
  } else{
    lcd.print("Lasers OFF");
  }
  delay(1);
}