#include <Wire.h>
#include <U8g2lib.h>

U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* SCL */ 13, /* SDA */ 12, /* RST */ U8X8_PIN_NONE);

#define HALL_SENSOR_PIN A0

void setup() {
  u8g2.begin();
}

void loop() {
  int hallValue = analogRead(HALL_SENSOR_PIN);

  char buffer1[25],buffer2[25];
  snprintf(buffer1, sizeof(buffer1), "Hall value: %d", hallValue);

  if (hallValue<500){
    snprintf(buffer2, sizeof(buffer2), "South Pole Closer");
  }
  else  {
    snprintf(buffer2, sizeof(buffer2), "North Pole Closer");
  }

  u8g2.firstPage();
  do {
    u8g2.setFont(u8g2_font_ncenB08_tr);
    u8g2.drawStr(10, 20, buffer1);
    u8g2.drawStr(10, 40, buffer2);
  } while (u8g2.nextPage());

  delay(1000);
}