#include <LCD_I2C.h>

LCD_I2C lcd(0x27, 16, 2); // Default address of most PCF8574 modules, change according

byte gauge_left[8] =   {  B11111,  B10000,  B10000,  B10000,  B10000,  B10000,  B10000,  B11111};
byte gauge_center[8] = {  B11111,  B00000,  B00000,  B00000,  B00000,  B00000,  B00000,  B11111};
byte gauge_right[8] =  {  B11111,  B00001,  B00001,  B00001,  B00001,  B00001,  B00001,  B11111};
byte gauge_fill[8] =   {  B11111,  B11111,  B11111,  B11111,  B11111,  B11111,  B11111,  B11111};

int nilaiPot;
int cpu_gauge;
int gpu_gauge;
char buffer[10];

void setup() {
  lcd.begin();
  lcd.createChar(0, gauge_left);
  lcd.createChar(1, gauge_center);
  lcd.createChar(2, gauge_right);
  lcd.createChar(3, gauge_fill);
  lcd.backlight();
}

void loop() {
  cpu_gauge = map(analogRead(A0), 0, 1023, 0, 100);

  lcd.setCursor(0, 0);
  lcd.print("CPU ");
  
  float cpu_gauge_step = 100.0 / 8.0;       
  for (int i = 0; i < 8; i++) {
    if (cpu_gauge <= cpu_gauge_step * i) {  
      if (i == 0)      {
        lcd.write(0); 
      }
      else if (i == 7) {
        lcd.write(2); 
      }
      else           {
        lcd.write(1); 
      }
    }
    else {                                  
      lcd.write(3);
    }
  }
  sprintf(buffer, "%3d%%", cpu_gauge);
  lcd.print(buffer);

}