/*
  Photoresistor (LDR) Analog Demo

  Copyright (C) 2021 Uri Shaked.

  https://wokwi.com/arduino/projects/305193627138654786
*/

#include <LiquidCrystal_I2C.h>

#define LDR_PIN 2
#define SERVO 9

LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  pinMode(LDR_PIN, INPUT);
  Serial.begin(9600);
}

bool keypress(int voltage) 
{
  float  voltageLevel = 1.5;

  if (voltage > static_cast<int>(voltageLevel) ) {
    return true;
  }  else {
    return false;
  };


  if(command == 1)
  {
    SERVO == HIGH;
  }
}

void loop() {
  int analogValue = analogRead(A0);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);

  Serial.print("Voltage: ");
  Serial.println(voltage);  

  Serial.print("Resistance: ");
  Serial.println(resistance);

  Serial.print("Result: ");
  bool status = keypress(voltage);
  Serial.println(status);

  lcd.setCursor(2, 0);

  lcd.print("          ");

  delay(500);
}