refactor for use the the ultrasonic range finder
remove newline
add newline
better error handling
better error reporting
Merge branch 'master' into urf-sensor
try kwargs
use TextIOWrapper
go to analog
some cleanup for liquid level sensor
full is 22 cm
change empty value
change empty value
Merge pull request #1 from dubhunter/urf-sensor

Ultrasonic Range Finder Level Sensor Refactor