What with the glorious sunny weather, I wondered how hot my flat actually gets. It's certainly felt far too warm recently.

Now, the sensible way to find out is to go and buy a thermometer. But Robert Days are closed for the evening. So instead I dug out an Arduino kit I was given for my birthday (Elegoo's "The Most Complete Starter Kit for the Mega 2560") and set to work...



The answer: 27°C!

( Code! )