Configure Serial Port Communication Settings - MATLAB & Simulink (2024)

Before you can write or read data, both the serial port object and the instrument must have identical communication settings. Configuring serial port communications involves specifying values for properties that control the baud rate and the Serial Data Format. These properties are as follows.

Serial Port Communication Properties

Property Name

Description

BaudRate

Specify the rate at which bits are transmitted.

Parity

Specify the type of parity checking.

DataBits

Specify the number of data bits to transmit.

StopBits

Specify the number of bits used to indicate the end of a byte.

Terminator

Specify the terminator character.

Caution

If the serial port object and the instrument communication settings are not identical, you might not be able to successfully read or write data.

Refer to your instrument documentation for an explanation of its supported communication settings.

You can display the communication property values for the serial port object s created in Create Serial Port Object.

s = serialport("COM4",9600)
s = Serialport with properties: Port: "COM4" BaudRate: 9600 NumBytesAvailable: 0 Show all properties, all methods Port: "COM4" BaudRate: 9600 NumBytesAvailable: 0 ByteOrder: "little-endian" DataBits: 8 StopBits: 1 Parity: "none" FlowControl: "none" Timeout: 10 Terminator: "LF" BytesAvailableFcnMode: "off" BytesAvailableFcnCount: 64 BytesAvailableFcn: [] NumBytesWritten: 0 ErrorOccurredFcn: [] UserData: []
Configure Serial Port Communication Settings
- MATLAB & Simulink (2024)

FAQs

How to do serial communication in Matlab? ›

This example is Windows® specific.
  1. Create a serial port object — Create the serial port object s associated with the serial port COM1. s = serialport("COM1",9600);
  2. Write and read data — Write the *IDN? ...
  3. Disconnect and clean up — Clear the serial port object s from the MATLAB® workspace when you are done working with it.

How to initialize serial port in Matlab? ›

You create a serial port object with the serialport function. serialport requires the name of the serial port connected to your device and the baud rate as input arguments. You can also configure property values during object creation using name-value pair arguments.

How to set COM port for serial communication? ›

The receiver's default port settings are:
  1. 9600 bps.
  2. no parity.
  3. 8 data bits.
  4. 1 stop bit.
  5. no handshaking.
  6. echo off.
  7. break on.

How do I change my COM port settings? ›

How do I change the default COM port setting for multiport serial...
  1. Go to Windows Device manager > Multi-port serial adapters.
  2. Select the adapter and right click to open the menu.
  3. Click on the Properties link.
  4. Open the Ports Configuration tab.
  5. Click on the Port Setting button.
  6. Select the Port Number and click OK.
3 days ago

How do you set up serial communication? ›

To configure the settings for a serial port, you will need to access the device manager or the BIOS (Basic Input Output System) settings on your computer. Once you have located the serial port, you can adjust the settings such as the baud rate, data bits, parity, and stop bits.

How to send data to serial port in MATLAB? ›

Write and Read Data with Serial Port Device
  1. device = serialport("COM3",9600)
  2. write(device,1:5,"uint8")
  3. read(device,5,"uint8")

What is Serialportlist in MATLAB? ›

serialportlist or serialportlist("all") returns a list of all serial ports on a system. The list includes virtual serial ports provided by USB-to-serial devices and Bluetooth® Serial Port Profile devices. The list shows all the serial ports you can access on your computer and can use for serial port communication.

Where can you configure the serial port? ›

To configure the Serial Port for your device, on your computer go to Control Panel - Device Manager, select “High-Speed USB Serial Port (Com X)”, right click and select Properties. Click the Features tab. This tab is used to change the COM port number and configure the port.

How to change port in MATLAB? ›

Click the Port Settings tab and set the Bits per second parameter. In the Configuration Parameters dialog window, go to Host-board connection. Set Set host COM port to either Manually Select or Manually Specify and update the COM port number and Bootloader COM port to match the ports numbers in Windows.

How do I connect to a serial port? ›

To connect a device to a serial port, you will need a serial cable that matches the connector on the device. The most common type of serial cable is a 9-pin male-to-male cable. The cable is then connected to the serial port on the computer or device.

What is the most common communication configuration for a serial port? ›

This serial communication standard is widely used and is often equipped on computers as standard.It is also called "EIA-232".

How do I set up a communication port? ›

To change the COM port settings on a Windows computer go to ' Start ' > ' Control Panel ' > ' Device Manager ' > ' Ports ' > ' Communication Port (COM1) ' At this point right click and choose Properties and go into the Port Settings tab.

How do I initialize a COM port? ›

How to Initialize a Port
  1. Start Admintool, if it's not already running. ...
  2. Select Serial Ports from the Browse menu. ...
  3. Select the port or ports that you want to initialize.
  4. Choose Modify from the Edit menu. ...
  5. Choose Initialize Only - No Connection from the Use Template menu. ...
  6. Click on OK to initialize the port.

How do I make a COM port available? ›

Expand the Ports (COM & LPT) section. Right-click the COM port and select Properties. Click the Port Settings tab and click Advanced. Change the COM port number to an available COM port number.

How to set COM port 1? ›

In the Device Manager, expand the Universal Serial Bus Controllers tree. You will see your native COM port listed as Communications Port (COM1). Right-click on Communications Port (COM1) and select Properties. In the Properties window, click on the Port Configuration tab and then click on Port Setting.

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