UDP Send

Send UDP packets


Send a UDP packet to a network address identified by the remote IP address and remote IP port parameters.

The data type of the block input data is double.

The block input accepts a one-dimensional vector of variable length.

The block input supports the following data types: uint8, int8, uint16, int16, uint32, int32, single, and double.


If you are having trouble using UDP to communicate between your host computer and your Apple iOS device, investigate whether anti-virus or firewall software might be blocking UDP traffic. If so, try to reconfigure the software to allow UDP traffic for a specific IP port number.


Remote IP address (‘’ for broadcast)

Enter the address or hostname of the IP node on the remote device.

To broadcast the UDP message to all devices, use the default parameter value, ''. Use the IP address, '', sparingly to avoid creating unnecessary broadcast traffic on your network. Often, IP routers are configured to drop broadcast UDP packets sent to ''.

Remote IP port

The number of the IP port on the remote device, which can range from 1 to 65535. This value defaults to 25000.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Introduced in R2015a