This example shows how to set up an echo UDP server.

Start the echoserver using the echoudp function on port 4012. Create a udpport instance to communicate with the echo server.

echoudp("on",4012)
u = udpport

u = 
  UDPPort with properties:

     IPAddressVersion: "IPV4"
            LocalHost: "0.0.0.0"
            LocalPort: 58379
    NumBytesAvailable: 0

  Show all properties, functions

Write data using the write function to the echo server running on port 4012.

write(u,1:10,"uint8","127.0.0.1",4012);

The echo server sends back the data written to it. Read this data back using the read function.

data = read(u,10)

data = 1×10

     1     2     3     4     5     6     7     8     9    10

Stop the echo server and clear the udpport object.

echoudp("off")
clear u