#include <LiquidCrystal_I2C.h>

#define LCD_ADDR 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2
#define POT A0
#define MIN_POT 0
#define MAX_POT 1023
#define LEFT_STOP -150 // in GRAD -360
#define RIGHT_STOP 190 // in GRAD
#define GRAD_SIGN 223  // °

LiquidCrystal_I2C lcd(LCD_ADDR, LCD_COLUMNS, LCD_ROWS);

const unsigned long interval_lcd = 50;
int interval_green;

char buffer_0 [15];
char buffer_1 [15];

int potValue, pos, grad;

void setup() {
  pinMode(POT, INPUT);
  lcd.begin(16,2);
  lcd.init();
  lcd.backlight();
}

void loop() {
  static unsigned long previousMillis_lcd = 0;
  unsigned long currentMillis = millis();
    
  potValue = analogRead(POT);
  pos = map(potValue,MIN_POT,MAX_POT,LEFT_STOP,RIGHT_STOP);
  if (pos < 0){
    grad = pos + 360; 
  }
    else{
    grad = pos;
    }
  
  if (currentMillis - previousMillis_lcd >= interval_lcd) {
    sprintf(buffer_0,"Ant%4d%1cPos%4d%1c",grad,char(GRAD_SIGN),pos,char(GRAD_SIGN));
    lcd.setCursor(0,0);
    lcd.print(buffer_0);

    sprintf(buffer_1,"PotVal %9d",potValue);
    lcd.setCursor(0,1);
    lcd.print(buffer_1);
   
    previousMillis_lcd = currentMillis;
  }
}