Adding sensors to the Prusa i3 3D printer

Hi. I have a Prusa i3 3D printer and I need to add a rain sensor to the Arduino Mega on it. How would I go about doing this?

If you do a little search on how connecting the rain sensor to an arduino, you will see that you need to use an analog input. The Mega on the Prusa doesn't use all the analog inputs. You can use A3, A4 or A5. Just check the schematics of your printer to confirm this.
Next, you just need to add simple code to read the analog value. It's also very simple and there is already a model for this in the arduino software.

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