Table Of Contents

UDP Read (Binary (U32 Address)) (G Dataflow)

Last Modified: December 18, 2017

Reads a binary datagram from a UDP socket. This node returns data when it receives any bytes. When the node receives no bytes, it waits up to the timeout period you specify.

Programming Patterns
connector_pane_image
datatype_icon

connection ID in

A network connection refnum that uniquely identifies the UDP socket.

datatype_icon

max size

The maximum number of bytes to read. You should wire the largest value your application expects. This number must be greater than or equal to the size of the actual datagram. On Windows, if you wire a number less than the size of the actual datagram, LabVIEW returns error 113. On other platforms, the output data is truncated to the requested size.

Default: 548

datatype_icon

timeout ms

Time, in milliseconds, that the node waits to complete before reporting a timeout error.

Wire a -1 to this input to wait indefinitely.

Default: 25,000 ms

datatype_icon

error in

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.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

datatype_icon

connection ID out

Same value as connection ID in.

datatype_icon

data out

The data read from the UDP datagram.

datatype_icon

error out

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.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.
datatype_icon

port

The port of the UDP socket that sent the datagram.

datatype_icon

address

The address of the computer where a datagram originates.

Where This Node Can Run:

Desktop OS: Windows

FPGA: This product does not support FPGA devices

Web Server: Not supported in VIs that run in a web application


Recently Viewed Topics