#include <Wire.h>
#include <OneWire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DallasTemperature.h>

#define WIDTH_SCREEN 128
#define HEIGHT_SCREEN 64
#define RESET -1
#define TEMP 5
#define BUTT 6

Adafruit_SSD1306 screen(WIDTH_SCREEN, HEIGHT_SCREEN, &Wire, RESET);
OneWire datTEMP(TEMP);
DallasTemperature sensor(&datTEMP);

bool isINVERT = false;
bool lastBUTT = HIGH;

void setup() {
  screen.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  screen.clearDisplay();
  pinMode(BUTT, INPUT_PULLUP);
  sensor.begin();
  Serial.begin(9600);
} 

void loop() {
  sensor.requestTemperatures();
  float temperature = sensor.getTempCByIndex(0);
  bool tekBUTT = digitalRead(BUTT);
  if (lastBUTT == HIGH && tekBUTT == LOW) {
    isINVERT = !isINVERT;
    screen.invertDisplay(isINVERT);
  }
  lastBUTT = tekBUTT;
  screen.clearDisplay();
  screen.setTextSize(2);
  screen.setTextColor(SSD1306_WHITE);
  screen.setCursor(0, 0);
  screen.print("Temperature: ");
  screen.print(temperature);
  screen.display();
  delay(300);
}