Added get_distance() to ColourDistanceSensor

[highflying]

The distance values returned from the build hat don't seem to reflect any particular unit of distance, a value of 0 to 10 is returned, which is good enough for me to use for proximity detection.

[mutesplash]

Looking at the modes returned from my device, it seems like distance (PROX...imity) should be mode 1, not 6. Six seems to be RGB readings.

You've got this connected to the BuildHAT and tested the code using it, correct?
https://www.lego.com/en-us/product/color-distance-sensor-88007

[highflying]

Looking at the modes returned from my device, it seems like distance (PROX...imity) should be mode 1, not 6. Six seems to be RGB readings.

You've got this connected to the BuildHAT and tested the code using it, correct? https://www.lego.com/en-us/product/color-distance-sensor-88007

Sorry, yes this is tested on a Raspberry Pi 3+ with the BuildHAT attached, I had just forgotten to commit that last change I had made directly on the raspberry pi to use mode 1. This PR now correctly uses mode 1.

[chrisruk]

Thanks for this, just tested it, will approve and merge now.