Required Libraries

• Arduino PID Library:

  https://github.com/br3ttb/Arduino-PID-Library

• Adafruit MAX31855 Library:

  https://github.com/adafruit/Adafruit-MAX31855-library

• Adafruit SSD1306 Library:

  https://github.com/adafruit/Adafruit_SSD1306

• Adafruit GFX Library:

  https://github.com/adafruit/Adafruit-GFX-Library