IoT 아두이노 0616 - V/R + PIEZO

#include <LiquidCrystal.h>
int pin_PIEZO = 22;
int pin_VR = A1;
int pin_LCD_DATA[8] = {A8,A9,A10,A11,A12,A13,A14,A15};
int pin_LCD_CTRL[3] = {A5,A6,A7};
LiquidCrystal lcd(A5,A6,A7,A8,A9,A10,A11,A12,A13,A14,A15);


void setup() {
  pinMode(pin_VR, INPUT);
  pinMode(pin_PIEZO, OUTPUT);
  lcd.begin(16,2);
  lcd.print("ADC Data :");
  lcd.setCursor(0, 1);
  lcd.print("Volt :      [V]");

}

void loop() {
  uint16_t da = analogRead(pin_VR);
  float voltage = (float)da * 5 /1023;
  //int beep = ((float)((da)/70)*90);
  lcd.setCursor(11, 0);
  if(da<1000){lcd.print(" ");}
  if(da<100){lcd.print(" ");}
  if(da<10){lcd.print(" ");}
  lcd.print(da);
  lcd.setCursor(8, 1);
  lcd.print(voltage);
  tone(pin_PIEZO, da);
  delay(500);
}