Problema al programar.

Estoy haciendo mi robot evasor de obtaculos y bueno según yo toda la programación esta correcta, la dejo aquí Dropbox - File Deleted - Simplify your life
Aún así al momento de verifiicar me tira este error

1354×636 25.2 KB

Arduino: 1.5.5-r2 (Windows 7), Placa:"Arduino Uno"

sketch_mar14a.ino: In function 'void checkDistancia()':
sketch_mar14a:54: error: 'class Ultrasonic' has no member named 'Ranging'
sketch_mar14a:54: error: 'CM' was not declared in this scope

This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.

No entiendo bien por qué, si me pueden ayudar desde ya muchas gracias

Google says that problem is associated with using an old version of the library, the updated version can be found here

https://plus.google.com/101592352151414193905/posts/MnXjK1uNoVp

https://dl.dropboxusercontent.com/u/41082176/Arduino%20robot%20with%20ultrasonic%20sensor%20and%20wheels/Arduino_Library_For_Ultrasonic_Ranging_Module_HC_SR04.zip