bricks/ev3dev: use dedicated reflection mode

REF-RAW was giving too much variation

Author: laurensvalk

bricks/ev3dev/modules/pybricks/ev3devices.py

@@ -86,8 +86,8 @@ def reflection(self):
             float -- Reflection, ranging from 0.0 (no reflection) to 100.0 (high reflection).
 
         """
-        self._mode('REF-RAW')
-        return round(max(0, min(self._value(0)*-0.2965+193.6, 100)), 1)
+        self._mode('COL-REFLECT')
+        return self._value(0)
 
     def rgb(self):
         """Measure the reflection of a surface (using a red, green, and blue light, each measured in turn).

lib/fake-pybricks/pybricks/ev3devices.py

@@ -331,7 +331,7 @@ def reflection(self):
         """Measure the reflection of a surface using a red light.
 
         Returns:
-            :ref:`percentage`: Reflection, ranging from 0.0 (no reflection) to 100.0 (high reflection).
+            :ref:`percentage`: Reflection, ranging from 0 (no reflection) to 100 (high reflection).
 
         """
         pass