Arduino project

code.ino

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int buttonPin = 7;
int buttonState;
int buttonPresses = 0;

void setup() {
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Temp:");

  lcd.setCursor(0, 1);
  lcd.print("Light: ");

  pinMode(buttonPin, INPUT);
}

void loop() {
  buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH) {
    buttonPresses = buttonPresses + 1;
  }

  printTemperature(analogRead(A0));
  printLight(analogRead(A1));

  delay(1000);
}

void printTemperature(int sensorValue) {
  lcd.setCursor(7, 0);
  
  double temp = (double)sensorValue / 1024;
  temp = temp * 5;
  temp = temp - 0.5;
  double tempC = temp * 100;
  double tempF = tempC * (9.0 / 5.0) + 32;

  String output;

  if (buttonPresses % 2 == 0) {
    output = String(tempF) + "F";
  } else {
    output = String(tempC) + "C";
  }

  lcd.print(output);
}

void printLight(int sensorValue) {
  lcd.setCursor(7, 1);

  sensorValue = sensorValue - 165;

  String output = String(sensorValue);

  lcd.print(output);
}