write
Description
Examples
Write uint8
Data from TCP/IP Server
Create a TCP/IP server that listens for a client connection request at the specified port and IP address. Then, write data from the server to the connected client.
Create a TCP/IP server that listens for connections at localhost
and port 4000.
server = tcpserver("localhost",4000)
server = TCPServer with properties: ServerAddress: "127.0.0.1" 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 IP address and port number you use to create server
.
client = tcpclient("localhost",4000)
client = tcpclient with properties: Address: 'localhost' Port: 4000 NumBytesAvailable: 0 Show all properties, functions
Display the values of the Connected
, ClientAddress
, and ClientPort
properties for server
.
server
server = TCPServer with properties: ServerAddress: "127.0.0.1" ServerPort: 4000 Connected: 1 ClientAddress: "127.0.0.1" ClientPort: 49653 NumBytesAvailable: 0 Show all properties, functions
The output shows that server
successfully accepts a request from client
and that client
establishes a connection to server
.
Send data to the client by writing it using the server
object. Since the client is connected to the server, this data is available in the client. Read the data from the client
object.
write(server,[6,9,14,26,27,42],"uint8")
read(client,client.NumBytesAvailable)
ans = 1×6 uint8 row vector
6 9 14 26 27 42
Write String Data from TCP/IP Server
Create a TCP/IP server that listens for a client connection request at the specified port and IP address. Then, write data from the server to the connected client.
Create a TCP/IP server that listens for connections at localhost
and port 4000.
server = tcpserver("localhost",4000)
server = TCPServer with properties: ServerAddress: "127.0.0.1" 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 IP address and port number you use to create server
.
client = tcpclient("localhost",4000)
client = tcpclient with properties: Address: 'localhost' Port: 4000 NumBytesAvailable: 0 Show all properties, functions
See the values of the Connected
, ClientAddress
, and ClientPort
properties for server
.
server
server = TCPServer with properties: ServerAddress: "127.0.0.1" ServerPort: 4000 Connected: 1 ClientAddress: "127.0.0.1" ClientPort: 65136 NumBytesAvailable: 0 Show all properties, functions
The output shows that server
successfully accepts a request from client
and that client
establishes a connection to server
.
Send data to the client by writing it using the server
object. Since the client is connected to the server, this data is available in the client. Read this data from the client
object.
write(server,"hello world","string") read(client,11,"string")
ans = "hello world"
Input Arguments
t
— TCP/IP server
tcpserver
object
TCP/IP server, specified as a tcpserver
object.
Example: write(t,10)
writes from the TCP/IP server
t
to the client connected to it.
data
— Numeric or ASCII data
numeric | character vector | string scalar
Numeric or ASCII data, specified as a row (1-by-N
) or column
(N
-by-1) vector of numeric values or as a character vector or
string scalar of text. For all numeric datatype
types,
data
is a row vector of values.
Example: write(t,300)
writes the value
300
.
Data Types: single
| double
| int8
| int16
| int32
| int64
| uint8
| uint16
| uint32
| uint64
| char
| string
datatype
— Size and format of each value
"uint8"
(default) | "int8"
| "uint16"
| "int16"
| "uint32"
| "int32"
| "uint64"
| "int64"
| "single"
| "double"
| "char"
| "string"
Size and format of each value, specified as a character vector or string.
datatype
determines the number of bytes to write for each value
and the interpretation of those bytes as a MATLAB® data type.
For any read or write operation, the data type is converted to
uint8
for the data transfer. After the transfer, the data type
reverts to the specified datatype
.
Example: write(t,1:5,"double")
writes the values
[1,2,3,4,5]
as double data.
Data Types: char
| string
Version History
Introduced in R2021a
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