This is the video where a DecaWiNo running SDS-TWR gives a feedback on an RGB-strip.
In this video, a fixed node running DecaDuino executes a ranging session every 100ms with another node, using the SDS-TWR protocol.
Once the distance to the other node is estimated, the fixed node represents the distance by driving an RGB LED strip: the LED corresponding to the estimated distance is powered up in blue.
Note that the strip used in the video is 1m-long and the leds are spaced by 1.65cm. Using a LED strip gives a direct and real-time feedback of the ranging precision and accuracy using DecaDuino.