Thank you @EricM_Inovelli for the explanation of mmWave sensor configuration! Also helpful is the user manual attached to the Z-wave certification. However, I find the configuration parameters a little confusing: why are the parameters specified as distances (in cm?) in the X, Y, and Z axes instead of angles in the XZ and YZ planes and a radial detection range? As an RF device, I would expect the field-of-view to be expressed as a cone defined by the -3dB angles in the XZ and YZ planes, and previous posts about this switch follow this convention. This is confusing because the configuration parameters define a cubic volume, while the field-of-view is (ideally) a conic volume. In fact, the manufacturer datasheet does specify horizontal and vertical beam angles of -60 to 60 degrees (section 4.3). So in the context of a 120-degree conic field-of-view, what do the rectilinear configuration parameters mean?
After reviewing the sensor datasheet, it appears that the configuration parameters (X_min, X_max, Y_min, Y_max, Z_min, Z_max) are exposed directly from the sensor API. From the datasheet, it seems that while “side-mounting” is described (with a 6m range), the intended use of the sensor is top-mounted (ceiling) looking down, and the detection parameters are defined “with the point at which the module is vertically projected to the floor as the origin.” In this context, I think the X and Y distances are to be interpreted as dimensions on the floor. So what does that mean in the context of a side-mounted sensor? Dimensions within a circle in the XY plane defined at the limit of detection sensitivity? Closer to the switch (as Z approaches zero), the sensitivity would not equal the configured X and Y limits; I guess that is what is meant in the manual by “as you can see in the graph, the range decreases closer to the switch.”
What is the purpose of Z_min?
After reviewing the user manual, I think it would be helpful to include a graphic depicting the XYZ axes in relation to the switch. Something like this:
Thanks, I’m really excited to install these!
Administrator edit: Edited the drawing to properly reflect the axis labels.