#include <TinyWireM.h>          // I2C library for ATtiny
#include <Tiny4kOLED.h>         // SSD1306 OLED library for ATtiny
#include <OneWire.h>            // OneWire bus communication
#include <DallasTemperature.h>  // DS18B20 temperature sensor library

// Pin definitions
#define ONE_WIRE_BUS 4         // DS18B20 data pin on PB4
#define SDA_PIN 0              // I2C SDA on PB0
#define SCL_PIN 2              // I2C SCL on PB2

// Setup OneWire and DallasTemperature objects
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// Variables
float tempF;

void setup() {
  // Initialize I2C
  TinyWireM.begin();
  
  // Initialize OLED display (128x64)
  oled.begin();
  oled.clear();
  oled.on();
  oled.setFont(FONT8X16);  // Use larger font for big numbers
  
  // Initialize temperature sensor
  sensors.begin();
}

void loop() {
  // Request temperature reading
  sensors.requestTemperatures();
  
  // Get temperature in Celsius and convert to Fahrenheit
  float tempF = sensors.getTempFByIndex(0);
  //tempF = (tempC * 9.0 / 5.0) + 32.0;
  
  // Clear display
  oled.clear();
  
  // Position cursor
  oled.setCursor(0, 0);
  
  // Print temperature in big numbers
  if (tempF >= 100) {
    oled.print(tempF, 1);  // One decimal place
  } else if (tempF >= 10) {
    oled.print(" ");       // Add padding for alignment
    oled.print(tempF, 1);
  } else {
    oled.print("  ");      // More padding for single digits
    oled.print(tempF, 1);
  }
  
  // Add degree symbol and F
  oled.setCursor(100, 0);
  oled.print((char)176);   // Degree symbol
  oled.print("F");
  
  delay(100);  // Update every second
}