// Arduino prototyping shield: https://s.click.aliexpress.com/e/_ApbCwx // USB to 5V power cable with crocodile clips: https://s.click.aliexpress.com/e/_DcjKaRH ...
If your program contains parameters that change over time (like measurement reference or calibration data, i.e. desired temperature), those parameters are most easily changed using an LCD and a menu.