Reads the position of the needle using the base of the needle and the array of the points of the arc traced by the tip of the needle.
This node reads meters with a dark needle on a light background or with a light needle on a dark background. It returns the location of the tip of the needle as a percentage of the full range of the meter.
Reference to the source image.
Cluster containing the coordinates of the base of the needle.
Array of clusters containing the coordinates of the points of the arc traced by the tip of the needle.
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Default: No error
Angle of the needle as a percentage of the full-scale angle.
Cluster that specifies the coordinates of the needle tip.
Error information.
The node produces this output according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application