I am writing a wearable app, and am testing it on my Samsung S3 Frontier smartwatch, but am confused about the values I am getting for the HRM Green sensor.

The documentation says that the SENSOR_HRM_LED_GREEN sensor has the range: 0-1,081,216.

However, when I query the sensor_get_min_range(), sensor_get_max_range(), and sensor_get_resolution(), it reports back: 0.0 – 1.0 with resolution of 1.0.

(The resolution of 1.0 makes sense since the sensor value is really an INT, although it is reported via a FLOAT.  But the 0.0-1.0 does not make sense.)

Then, when I start the listener, and receive the callbacks, the sensor_event_s parameter reports the sensor value as a FLOAT, with values way above 1,081,216, such as the values listed at the end of this post.

So my question is whether the values I am receiving are correct, or if they really should have been under 1,081,216.

Feedback from anybody who has had experience with this sensor would be much appreciated.

Example values reported (10 ms interval) – the values are floating point values, but they all have 0’s after the decimal point (as expected):