Add Readme

README.org

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+* Arduino Course
+  
+  Code from Universidad de Granada's Arduino Course.
+  
+** Usage
+   
+   If you want to use arduino-cli instead of the official Arduino IDE, you can use compile.sh
+   For example:
+   
+#+BEGIN_SRC sh
+  arduino-cli sketch new Test
+  ./compile.sh Test
+#+END_SRC