Open the Arduino software and paste the Arduino code (the text in the box near the bottom of the post) into a new sketch. Click Sketch > Verify / Compile to make sure the code is properly in there.

The Arduino software environment, including the IDE, libraries, and general approach, are geared toward education. It’s meant as a way to introduce embedded development to newbies.

The Arduino development team has today announced the availability of a new Arduino IDE in the form of Arduino 1.8.11. The open-source Arduino Software (IDE) makes it easy to write code and upload ...

The write-up contains a lot of detail about the code behind the Enigma and is interesting to read. Interestingly, the PCB was designed in Fritzing, the EDA software many love to hate.