README.md in artoo-sphero-1.2.0 vs README.md in artoo-sphero-1.3.0

@@ -12,9 +12,15 @@
 
 ```
 gem install artoo-sphero
 ```
 
+Afterwards you need to install `socat` - for this please run the following command (works on both OSX and Linux):
+
+```
+artoo install socat
+```
+
 ## Using
 
 ```ruby
 require 'artoo'