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TCP/IP Send

Send data over TCP/IP network to specified remote machine

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  • TCP/IP Send block

Libraries:
Instrument Control Toolbox

Description

The TCP/IP Send block configures and opens an interface to the specified remote address using the TCP/IP protocol. The configuration and initialization occur once at the start of the model's execution. The block sends data either in blocking mode or nonblocking mode during the model's run time. Use the TCP/IP Send block to write streaming data over a TCP/IP network. This block works only as a TCP/IP client and cannot be used as a TCP/IP server.

The TCP/IP Send block has one input port that accepts both 1-D vector and matrix data. The array size of this data must not change during simulation. This block has no output ports. The block inherits the data type from the signal at the input port. Valid data types are single, double, int8, uint8, int16, uint16, int32, uint32, int64, and uint64.

Other Supported Features

  • The TCP/IP Send block supports the use of Simulink® Accelerator mode and Rapid Accelerator. This feature speeds up the execution of Simulink models.

  • The TCP/IP Send block supports the use of model referencing. This feature lets your model include other Simulink models as modular components.

  • The TCP/IP Send block supports C/C++ code generation. This feature allows you to generate C and C++ code using Simulink Coder™.

For more information on these features, see the Simulink documentation.

Examples

TCP/IP Client Block Communication with Arduino Server

TCP/IP Client Block Communication with Arduino Server

Send data to Arduino server using TCP/IP Send and read it back using TCP/IP Receive.

Ports

Input

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Data values to send from the block to your remote host, specified as a vector, matrix, or array. The array size of this data must not change during simulation. Set the parameters for this block before you send data.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Parameters

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IP address or name of the TCP/IP server that you want to send data to.

Programmatic Use

Block Parameter: Host
Type: character vector, string

Remote port on the TCP/IP server that you want to connect to, specified as a number from 1 to 65535.

Programmatic Use

Block Parameter: Port
Type: character vector, string
Values: 1 to 65,535
Default: '80'

Click this button to check if a connection to the specified remote address and port is valid.

Sequential order in which bytes are arranged into larger numerical values. If the byte order is little-endian, then the remote machine stores the first byte in the first memory address. If the byte order is big-endian, then the remote machine stores the last byte in the first memory address.

Configure the byte order to match the appropriate value for your remote machine before sending data. Refer to your instrument documentation for information about the order in which it stores bytes.

Programmatic Use

Block Parameter: ByteOrder
Type: character vector, string
Values: 'little-endian' | 'big-endian'
Default: 'big-endian'

This parameter has the simulation wait while the block sends data. Unselect the check box if you do not want the write operation to cause the simulation to wait.

If you enable blocking mode, the simulation waits for the data to be sent. If you do not enable blocking mode, the simulation runs continuously.

For more information, see Enable Blocking Mode in Receive and Send Blocks.

Programmatic Use

Block Parameter: EnableBlockingMode
Type: character vector, string
Values: 'on' | 'off'
Default: 'on'

Amount of time in seconds that the model waits for data to be sent during each simulation time step. This value is relative to real-world or "wall clock" time.

Programmatic Use

Block Parameter: Timeout
Type: character vector, string
Values: positive scalar
Default: '10'

Dependencies

To enable this parameter, set Enable blocking mode to on.

If you enable this parameter, the block collects small segments of outstanding data and sends them in a single packet when acknowledgement (ACK) arrives from the server. Unselect this check box if you want to immediately send data to the network.

If a network is slow, you can improve its performance by enabling the transfer delay. However, on a fast network acknowledgements arrive quickly and the difference between enabling or disabling the transfer delay is negligible.

Programmatic Use

Block Parameter: TransferDelay
Type: character vector, string
Values: 'on' | 'off'
Default: 'on'

Extended Capabilities

Version History

Introduced in R2007b

See Also