title: How to transfer an Integer from an Arduino to another Arduino?
body: <p>So I have to write a code that recognizes colour using a colour-detector.
  The because the colourpalette is limited to just 6 colours I can be saved as an Integer (Red as 0, Green as 1 aso.).
  Now I have problems transfering the Integer from the Arduino that handles the detector to the Arduino I have to write code on.
  I tried using the analog (A0) pin but with that I only ended up with a 19-20 whenever I tried to transfer anything at all.
  Is there a solution to transfer an Integer from 0-5? 
  Thanks in advance </p>