flush

Create a TCP/IP server on port 4000.

server = tcpserver(4000)

server = 
  TCPServer with properties:

        ServerAddress: "::"
           ServerPort: 4000
            Connected: 0
        ClientAddress: ""
           ClientPort: []
    NumBytesAvailable: 0

  Show all properties, functions

Create a TCP/IP client to connect to your server object using tcpclient. You must specify the same port number you use to create server.

client = tcpclient("localhost",4000);

Write some data to the client and view the number of bytes available to be read in the server input buffer.

write(client,1:5,"uint8")
server.NumBytesAvailable

ans = 5

Flush both the input and output buffers of the server.

flush(server)

View the number of bytes available to be read.

server.NumBytesAvailable

ans = 0

The input buffer has no data.