Received the doppler radar sensor. Very cool. Set up the test code on a Wio Terminal and printed speed through the serial terminal. Overall works good. However, speed values are not consistent. For example, moving a hand away from the sensor at a constant speed may give 52, 52, 104, 416, 364, 52… Not sure if this is typical or if my particular device has an issue.
I also created a display for the Wio Terminal with the current speed in mph, max speed and line graph. Had the same issue with inconsistent values. When testing the unit with a walker approaching the sensor, resulting values were around 3.5 mph but also included some error spikes between 5 and 11 mph.
FYI, the documents mention the speed is 52cm/s or multiples of (correct) or 2.23 mph (incorrect, should be 1.16 mph)
Appreciate any feedback. Thanks!