SensorManager.md

@@ -12,6 +12,7 @@ It contains:
 * A callback function to be called after the sensor is sampled.
 * A boolean value indicating whether the sensor uses DMA or not.
 * A boolean value indicating whether the sensor is enabled or not (i.e. the sensor has to be sampled or not).
+* A boolean value indicating whether the sensor has been correctly initialized or not.
 
 ### Sensor Sampler