Not yet tested on the EV3.

So I did test this on the EV3, which resulted in 271f02a. But it seems I don't posses a single sensor that would both be listed in special sensors section and have a floating point value with non-zero decimals. All I could test is that Sensor._scale(mode) does work correctly (it returns 1 for my sensors). @marnovdm, would you mind testing this with your Ultrasonic sensor?

Thanks for the update, I will test this when I get home later today and update this comment.

UPDATE @ddemidov: I replaced core.py on my ev3 with the modified version for this commit. I was unable to find the liquid modified template file, but think it doesn't matter (?). When I test now it seems to work and returns the distance in centimeters:

>>> import ev3dev.ev3 as ev3
>>> ultrasonic = ev3.UltrasonicSensor('in1')
>>> ultrasonic.distance_centimeters
95.10000000000001
>>> ultrasonic.distance_centimeters
51.900000000000006
>>> ultrasonic.distance_centimeters
6.7
>>> ultrasonic.distance_centimeters
32.6
>>> ultrasonic.distance_centimeters
32.2
>>> ultrasonic.distance_centimeters
45.2
>>> ultrasonic.distance_centimeters
52.7
>>> ultrasonic.distance_centimeters
13.0

Looks good to me, thanks for fixing this so quickly!

Sorry, did not see the updated comment (github does not send notifications on updates, so its better to create new comments). Thanks for testing!