arduino

Connection to the Arduino and Arduino-compatible ESP32 hardware

Add-On Required: This feature requires the MATLAB Support Package for Arduino Hardware add-on.

Description

An arduino object represents a connection to Arduino^® or Arduino-compatible ESP32 hardware. Use the arduino function to connect Arduino or Arduino-compatible ESP32 hardware to MATLAB^®. After you create the object, you can program your hardware and use custom add-on libraries directly from MATLAB using the Object Functions.

Use the arduino object to connect to an Arduino board over USB, WiFi, or Bluetooth, by specifying the different arguments based on the connection type. For the supported connection type for each board, see Supported Boards.

Connection Type	Type of Valid Arguments	Option for Additional Name-Value Arguments
USB	port port and board	Yes Specify one or more Name-Value Arguments from these options: Name of Arduino libraries to which the programming environment must be limited Type of reference voltage Analog reference voltage Reprogram the Arduino board or not Program log and Arduino commands log (for debugging) Baud rate
Bluetooth	btaddress btname	No
WiFi	ipaddress ipaddress and board ipaddress, board, and tcpipport	No

Creation

Syntax

a = arduino

a = arduino(port,board)

a = arduino(___,Name,Value)

a = arduino(btaddress)

a = arduino(btname)

a = arduino(ipaddress,board)

a = arduino(ipaddress,board,tcpipport)

Description

USB

a = arduino recreates the last successful connection to the Arduino or Arduino-compatible ESP32 hardware. If there is no last successful connection or that connection failed, it creates a connection to an official Arduino hardware connected to your host computer via USB.

a = arduino(port,board) creates a connection to Arduino or Arduino-compatible ESP32 hardware on the specified serial port. The serial port can be a USB serial port.

a = arduino(___,Name,Value) creates a connection with additional options specified by one or more Name,Value pair arguments.

Bluetooth

a = arduino(btaddress) uses the Bluetooth^® address of the supported Arduino or Arduino-compatible ESP32 hardware. For the list of Bluetooth connection type supported hardware, see Supported Boards.

a = arduino(btname) uses the name of the of the supported Arduino or Arduino-compatible ESP32 hardware Bluetooth device to create a connection to the Arduino hardware. For the list of Bluetooth connection type supported hardware, see Supported Boards.

WiFi

a = arduino(ipaddress,board) creates a connection to the WiFi supported Arduino boards or ESP32 board at the specified IP address.

a = arduino(ipaddress,board,tcpipport) creates a connection to the WiFi supported Arduino boards or ESP32 board at the specified IP address and TCP/IP remote port.

Input Arguments

port — Hardware port

character vector | string array

Hardware port that your Arduino or ESP32 is connected to, specified as a character vector or string array. The port can be a USB serial port. To identify the USB serial port number, see Find Arduino Port on Windows, Mac, and Linux. This argument can be specified on its own if connected via USB serial port, or with a board name.

Example: a = arduino('COM5')

board — Name of Arduino enabled board

character vector | string array

Name of the Arduino enabled board, specified as a character vector or string array. This argument must be specified with a valid serial port, IP address, Bluetooth address, or Bluetooth name. See Supported Boards for all supported boards.

Example: a = arduino('COM5','Uno') creates a connection to an Arduino Uno board using port 5.

btaddress — Bluetooth address of the Nano 33 BLE, Nano 33 BLE Sense, Nano 33 IoT, MKR1010, HC-05, HC-06, ESP32-DevKitV1 or ESP32-DevKitC

character vector | string array

For Nano 33 BLE, Nano 33 BLE Sense, Nano 33 IoT, MKR1010, ESP32-DevKitV1 or ESP32-DevKitC the Bluetooth 4.0 address is the peripheral device's MAC address for Windows. For macOS, it is a random operating system assigned address.

For HC-05 or HC-06 devices, the Bluetooth Classic address is specified as a character vector or string array of the form btspp:// followed by the 12-digit hexadecimal value of the address. To identify the Bluetooth device address, see Pair a Bluetooth Device and Retrieve the Bluetooth Device Address.

Example: a = arduino('btspp://98d331fb3b77') creates a Bluetooth connection to a board using HC-05 or HC-06.

Example: a = arduino('5A8769A09DA6') creates a Bluetooth 4.0 connection between a Windows OS and Arduino Nano 33 BLE, Nano 33 BLE Sense, Nano 33 IoT, MKR1010, ESP32-DevKitV1 or ESP32-DevKitC boards.

Example: a = arduino('121B0BAC-0DE7-4FB1-909A-EEA6877DBC5C') creates a Bluetooth 4.0 connection to between a macOS and a Arduino Nano 33 BLE, Nano 33 BLE Sense, Nano 33 IoT, MKR1010, ESP32-DevKitV1 or ESP32-DevKitC boards.

btname — Bluetooth name of the device

character vector | string array

Bluetooth name of the device, specified as a character vector or string array.

Example: a = arduino('HC-05') creates a wireless Bluetooth connection to an Arduino Uno board that uses an HC-05 Bluetooth device.

Example: a = arduino('IMUBLE') creates a wireless Bluetooth connection to an Arduino Nano 33 BLE,Nano 33 BLE Sense, Nano 33 IoT, MKR1010, ESP32-DevKitV1 or ESP32-DevKitC boards that uses a Bluetooth 4.0 device.

ipaddress — IP address of Arduino board with WiFi support or ESP32 board

character vector | string array

IP address of the Arduino board with WiFi support, specified as a character vector or string array.

Example: a = arduino('192.168.1.15','MKR1000') creates a WiFi connection to an Arduino MKR1000 board that uses the IP address 192.168.1.15.

tcpipport — TCP/IP port on Arduino or ESP32 board

9500 (default) | numeric

TCP/IP port on the Arduino or ESP32 board, specified as a number.

Example: a = arduino('192.168.1.15','MKR1000',9500) creates a WiFi connection to an Arduino MKR1000 board that uses the TCP/IP port at 9500.

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Before R2021a, use commas to separate each name and value, and enclose Name in quotes.

Note

If you are connecting an Arduino board using Bluetooth or WiFi, you cannot specify Name,Value arguments.

Example: a = arduino('COM3','Uno','Libraries','I2C')

Libraries — Name of Arduino library

{'I2C' 'Servo' 'SPI'} (default) | APDS9960 | Adafruit/MotorShieldV2 | CAN | MotorCarrier | RotaryEncoder | Serial | ShiftRegister | Ultrasonic | character vector | cell array of character vectors

Name of the Arduino library, specified as the comma-separated pair consisting of 'Libraries' and a character vector or a cell array of character vectors. Libraries installed by default extend the Arduino environment.

Note

When you first connect to your Arduino hardware, your Arduino connection is created with these default libraries {'I2C' 'Servo' 'SPI'}. However, if you create an Arduino connection with libraries other than the defaults, your Arduino connection will have only the libraries that you specified, even after you disconnect and reconnect your Arduino hardware.

Note

The libraries CAN, Servo, and RotaryEncoder are not supported for ESP32 board.

Example: a = arduino('COM9','Uno','Libraries','spi') limits the environment to the SPI library.

Example: a = arduino('COM9','Uno','Libraries','Adafruit/MotorShieldV2') limits the environment to the Adafruit Motor Shields V2 library and its dependent libraries.

Example: a = arduino('COM9','Uno','Libraries','ShiftRegister') limits the environment to shift register library.

AnalogReferenceMode — Type of reference voltage

default depends on AnalogReference | internal | external | character vector

Type of reference voltage, specified as internal or external. In the external mode, an external voltage is applied at the AREF pin. In the internal mode, the internal voltage supported by the Arduino boards is used.

The actual default value depends on AnalogReference.

• If AnalogReference is used as a Name-Value arguments, the default value is set to external.

• If AnalogReference is not used as a Name-Value arguments, the default value is set to internal.

See Supported Boards for supported internal voltages of the Arduino boards.

Note

In the external mode, you must specify the external voltage applied at the AREF pin using AnalogReference. In the internal mode, you can specify the internal voltage supported on the boards. If you do not specify a voltage in the internal mode, the default internal reference voltage of the Arduino boards is used.

Example: a = arduino('COM9','Uno','AnalogReferenceMode','external','AnalogReference',1.1) sets the reference voltage externally to 1.1V.

AnalogReference — Analog reference voltage

double

Reference voltage of the analog input, specified as a double.

Before using an external reference voltage on the AREF pin, ensure the following for safety:

• Connect the external voltage to the AREF pin through a 5K resistor to prevent damaging the board. If AnalogReferenceMode is internal and a reference voltage is still connected externally at the AREF pin, you will short the internal reference voltage and the AREF pin, thus damaging the board.

• Do not use a voltage less than 0V or more than the maximum voltage supported by the boards.

Note

When you change the analog reference voltage, the output of readVoltage may not be accurate. Run readVoltage until you see the expected value. For Arduino Uno and Mega boards, see Incorrect readVoltage results.

Example: a = arduino('COM9','Uno','AnalogReferenceMode','external', 'AnalogReference',1.1) sets the reference voltage externally to 1.1V.

ForceBuildOn — Reprogramming of the Arduino board

false (default) | true

If 'ForceBuildOn' is not set as true, MATLAB does not reprogram the Arduino board and uses the existing Arduino server if the libraries that you specify match with libraries that are already on the existing Arduino server. Use this setting to update the Arduino server with different source code when you work with custom Arduino libraries.

Example: a = arduino('COM9','Uno','Libraries','CustomLibrary','ForceBuildOn',true) reprograms the Arduino board using your latest C++ source code for CustomLibrary.

Note

MATLAB does not reprogram the Arduino board and uses the existing Arduino server if the libraries that you specify match with libraries that are already on the existing Arduino server.

TraceOn — Program log and Arduino commands log

false (default) | true

Program log and Arduino commands log, specified as the comma-separated pair consisting of 'TraceOn' and either false or true. If you fail to connect to your Arduino board, set 'TraceOn' to true to print compilation and upload errors of Arduino IDE at the MATLAB command window. You can also set 'TraceOn' to true to print the Arduino commands executed on the Arduino board for each MATLAB command.

Example: a = arduino('COM9','Uno','TraceOn',true)

BaudRate — Bit transmission rate

The rate at which information is transferred in the communication channel. For Arduino Pro Mini, and Digital Sandbox use the BaudRate value of 57600. For all the other boards listed in Find Board Name use the BaudRate value of 115200.

Note

For streaming data from sensors at higher rates, set the BaudRate to a higher value. For other applications use the default BaudRate of the Arduino board.

Example: a = arduino('COM9','Uno','BaudRate',115200);

Dependencies

For streaming data from multiple sensors with Navigation Toolbox™ or Sensor Fusion and Tracking Toolbox™, set the BaudRate to 921600. This change on Arduino enables MATLAB to acquire real-time data from the GPS receivers and IMU sensors. For other applications use the default BaudRate of the Arduino board.

Properties

Port — Hardware port

Read-only: 'COM4' | 'COM5' | character vector | ...

This property is read-only.

Hardware port that your Arduino or ESP32 is connected to, specified as a character vector or string array. The port can be a USB serial port. Specify the port when you create the arduino object.

Example:

>> a.Port

ans =

    'COM4'

Data Types: char

Connected — Arduino device connection status over Bluetooth

Read-only: true or 1 | false or 0

This property is read-only.

Arduino device connection status over Bluetooth, returned as numeric or logical 1 (true) or 0 (false). Property is available for only Nano 33 BLE, Nano 33 BLE Sense, Nano 33 IoT, MKR1010, ESP32-DevKitV1, and ESP32-DevKitC boards.

Data Types: logical

Board — Name of Arduino enabled board

Read-only: 'Uno' | 'Due' | 'Mega2560' | character vector | ...

This property is read-only.

Name of the Arduino enabled board, specified as a character vector or string array. It is the type of Arduino hardware connected to your system. Specify the board type when you create the arduino object. See Supported Boards for all supported boards.

Example:

>> a.Board

ans =

    'Uno'

Data Types: char

AvailablePins — Pins available on Arduino device

Read-only: {'D2-D13', 'A0-A5'} | cell array of character vectors | ...

This property is read-only.

Pins available on Arduino device connected to your system, specified as cell array of character vectors.

Example:

a.AvailablePins

ans =

  1×18 cell array

  Columns 1 through 12

    {'D2'}    {'D3'}    {'D4'}    {'D5'}    {'D6'}    {'D7'}    {'D8'}    {'D9'}    {'D10'}    {'D11'}    {'D12'}    {'D13'}

  Columns 13 through 18

    {'A0'}    {'A1'}    {'A2'}    {'A3'}    {'A4'}    {'A5'}

Data Types: cell

AvailableDigitalPins — Digital pins available on Arduino device

Read-only: {'D2-D13', 'A0-A5'} (default) | cell array of character vectors

This property is read-only.

Digital pins available on Arduino device connected to your system, specified as cell array of character vectors.

Example:

a.AvailableDigitalPins

ans =

  Columns 1 through 12

    {'D2'}    {'D3'}    {'D4'}    {'D5'}    {'D6'}    {'D7'}    {'D8'}    {'D9'}    {'D10'}    {'D11'}    {'D12'}    {'D13'}

  Columns 13 through 18

    {'A0'}    {'A1'}    {'A2'}    {'A3'}    {'A4'}    {'A5'}

Data Types: cell

AvailablePWMPins — PWM pins available on Arduino device

Read-only: {'D3', 'D5-D6', 'D9-D11'} (default) | cell array of character vectors

This property is read-only.

PWM pins available on Arduino device connected to your system, specified as cell array of character vectors.

Example:

a.AvailablePWMPins

ans =

  {'D3'}    {'D5'}    {'D6'}    {'D9'}    {'D10'}    {'D11'}

Data Types: cell

AvailableAnalogPins — Analog pins available on Arduino device

Read-only: {'A0-A5'} (default) | cell array of character vectors

This property is read-only.

Analog pins available on Arduino device connected to your system, specified as cell array of character vectors.

Example:

a.AvailableAnalogPins

ans =

  1×6 cell array

    {'A0'}    {'A1'}    {'A2'}    {'A3'}    {'A4'}    {'A5'}

Data Types: cell

AvailableI2CBusIDs — I2C bus IDs available on Arduino device

Read-only: 0 (default) | numeric

This property is read-only.

The ID of I2C bus available on Arduino device connected to your system.

Example:

a.AvailableI2CBusIDs

ans =

  [0]

Data Types: double

AvailableSerialPortIDs — Serial ports available on Arduino device

numeric

The serial bus ID available on Arduino device connected to your system.

Note

The Arduino Due, Mega2560, and MegaADK boards have three serial ports available while the Arduino Leonardo, Micro, MKR1000, MKR1010, Nano33IoT, Nano33BLE, and ESP32 have only one serial port available.

Example:

a.AvailableSerialPortIDs

ans =

  1

Dependencies

This property is valid only when the serial library is used to create a connection to the Arduino hardware.

Data Types: double

Libraries — Installed Arduino add-on libraries

Read-only: {'I2C', 'Servo', 'SPI'} (default) | 'Adafruit/MotorShieldV2' | 'ShiftRegister' | character vector | cell array of character vectors

This property is read-only.

Installed Arduino add-on libraries downloaded to your hardware, specified as a character vector or cell array of character vectors. Check the available libraries with listArduinoLibraries to specify the add-on library you want to use.

Example:

a.Libraries

ans =

  1×3 cell array

    {'I2C'}    {'Servo'}    {'SPI'}

Data Types: cell | char

AnalogReferenceMode — Type of reference voltage

Read-only: default depends on AnalogReference | internal | external | character vector

This property is read-only.

Type of reference voltage, specified as internal or external. In the external mode, an external voltage is applied at the AREF pin. In the internal mode, the internal voltage supported by the Arduino boards is used.

The actual default value depends on AnalogReference.

• If AnalogReference is used as a Name-Value arguments, the default value is set to external.

• If AnalogReference is not used as a Name-Value arguments, the default value is set to internal.

In the external mode, you must specify the external voltage applied at the AREF pin using AnalogReference. In the internal mode, you can specify the internal voltage supported on the boards. If you do not specify a voltage in the internal mode, the default internal reference voltage of the Arduino boards is used.

Example:

a.AnalogReferenceMode

ans =

    'internal'

AnalogReference — Analog reference voltage

Read-only: double

This property is read-only.

Reference voltage of the analog input, specified as a double.

Before using an external reference voltage on the AREF pin, ensure the following for safety:

• Connect the external voltage to the AREF pin through a 5K resistor to prevent damaging the board. If AnalogReferenceMode is internal and a reference voltage is still connected externally at the AREF pin, you will short the internal reference voltage and the AREF pin thus damaging the board.

• Do not use a voltage less than 0V or more than the maximum voltage supported by the boards.

See Supported Boards for supported internal voltages of the Arduino boards.

When you change the analog reference voltage, the output of readVoltage may not be accurate. Run readVoltage until you see the expected value. For Arduino Uno and Mega boards, see Incorrect readVoltage results.

Example:

a.AnalogReference

ans =

    5.0

Supported Boards

The board input argument currently support these boards:

Arduino Board	Input Argument	WiFi Support	Bluetooth Support	Supported Internal Voltage (V)
Arduino Uno	'Uno'	No	Yes	5.0(default), 1.1
Arduino Uno R4 WiFi	'UnoR4WiFi'	Yes	No	1.5 (default)
Arduino Uno R4 Minima	'UnoR4Minima'	No	No	1.5 (default)
Arduino Due	'Due'	No	Yes	3.3 (default)
Arduino Mega 2560	'Mega2560'	No	Yes	5.0 (default), 1.1, 2.56
Arduino Leonardo	'Leonardo'	No	Yes	5.0 (default), 2.56
Arduino Mega ADK	'MegaADK'	No	No	5.0 (default), 1.1, 2.56
Arduino Micro	'Micro'	No	Yes	5.0 (default), 2.56
Arduino MKR1000	'MKR1000'	Yes	No	3.3 (default), 1.0, 1.65, 2.23
Arduino MKR WiFi1010	'MKR1010'	Yes	Yes	3.3 (default), 1.0, 1.65, 2.23
Arduino MKR Zero	'MKRZero'	No	No	3.3 (default), 1.0, 1.65, 2.23
Arduino Nano 3.1	'Nano3'	No	Yes	5.0 (default), 1.1
Arduino Nano 33 IoT	'Nano 33IoT'	Yes	Yes	3.3 (default), 1.0, 1.65, 2.23
Arduino Pro Mini	ProMini328_3V ProMini328_5V	No	No	3.3 (default), 1.1 5.0 (default), 1.1
Sparkfun Digital Sandbox	DigitalSandbox	No	No	3.3 (default), 1.1
Arduino Nano 33 BLE	'Nano33BLE'	No	Yes	3.3 (default)
Arduino Nano 33 BLE SENSE	'Nano33BLE'	No	Yes	3.3 (default)
ESP32-DevKitV1	'ESP32-WROOM-DevKitV1'	Yes	Yes	3.3 (default)
ESP32-DevKitC	'ESP32-WROOM-DevKitC'	Yes	Yes	3.3 (default)

For a list of other Arduino-compatible boards that have been tested and their corresponding input arguments, see Find Board Name.

Object Functions

The object functions device, shiftRegister, rotaryEncoder, servo, addon, and ultrasonic are used to create objects for each of their respective peripheral devices. Other functions are used to interact with the pins on your Arduino hardware.

device	Connection to device on I2C bus on Arduino or ESP32 hardware
device	Connection to device on SPI bus on Arduino or ESP32 hardware
device	Connection to serial device on Arduino or ESP32 hardware
shiftRegister	Connection to shift register on Arduino hardware
rotaryEncoder	Connection to quadrature encoder on Arduino or ESP32 hardware
servo	Connection to servo motor on Arduino or ESP32 hardware
servo	Connection to servo motor on Arduino MKR Motor Carrier or Nano Motor Carrier
addon	Connection to add-on device for Arduino hardware
ultrasonic	Connection to ultrasonic sensor on Arduino hardware
motorCarrier	Connection to Arduino MKR Motor Carrier or Nano Motor Carrier
apds9960	Connect to APDS9960 sensor on Arduino hardware using I2C bus
canChannel	Connection to CAN channel connected to a specified device

configurePin	Set Arduino pin mode
readDigitalPin	Read data from a specified pin on Arduino hardware
writeDigitalPin	Write data to a specified pin on Arduino hardware
writePWMVoltage	Generate PWM signal with specified voltage on digital pin
writePWMDutyCycle	Generate PWM signal with specified duty cycle on digital pin
playTone	Play tone on piezo speaker using digital pin
readVoltage	Read voltage from analog pin on Arduino hardware
scanI2CBus	Scan I2C bus on Arduino hardware for device address
motorCarrier	Connection to Arduino MKR Motor Carrier or Nano Motor Carrier
canChannel	Connection to CAN channel connected to a specified device

Examples

Connect to Arduino Hardware

Autodetect an Arduino Nano33IoT.

a = arduino()

arduinoObj =   
   
    arduino with properties:

                  Port: 'COM11'
                 Board: 'Nano33IoT'
         AvailablePins: {'D0-D13', 'A0-A7'}
  AvailableDigitalPins: {'D0-D13', 'A0-A7'}
      AvailablePWMPins: {'D2-D6', 'D9-D12', 'A2-A3', 'A5'}
   AvailableAnalogPins: {'A0-A3','A6-A7'}    
    AvailableI2CBusIDs: [0]
AvailableSerialPortIDs: [1]
             Libraries: {'SPI'}
Show all properties

Note

If an Arduino object was created previously, the new Arduino object created on the computer will have the same configuration as the earlier object.

Specify Port Number and Arduino Board Type

Connect to an Arduino Uno on port 9. The port and board names depend on your configuration.

a = arduino('COM9','Uno')

Updating server code on board Uno (COM9). This may take a few minutes.

a = 
  arduino with properties:

                  Port: 'COM9'
                 Board: 'Uno'
         AvailablePins: {'D2-D13', 'A0-A5'}
  AvailableDigitalPins: {'D2-D13', 'A0-A5'}
      AvailablePWMPins: {'D3', 'D5-D6', 'D9-D11'}
   AvailableAnalogPins: {'A0-A5'}
    AvailableI2CBusIDs: [0]
             Libraries: {'SPI'}
Show all properties

Specify Port Number and ESP32 Board Type

Connect to an ESP32-DevKitC on com port 4. The port and board names depend on your configuration.

a = arduino('COM4','ESP32-WROOM-DevKitC')

a = 
  arduino with properties:

                  Port: 'COM4'
                 Board: 'ESP32-WROOM-DevKitC'
         AvailablePins: {'D0-D5', 'D12-D19', 'D21-D23', 'D25-D27', 'D32-D39'}
  AvailableDigitalPins: {'D0-D5', 'D12-D19', 'D21-D23', 'D25-D27', 'D32-D39'}
      AvailablePWMPins: {'D1-D5', 'D12-D19', 'D21-D23', 'D25-D27', 'D32-D33'}
   AvailableAnalogPins: {'D2', 'D4', 'D12-D15', 'D25-D27', 'D32-D36', 'D39'}
    AvailableI2CBusIDs: [0]
AvailableSerialPortIDs: [2]
             Libraries: {'I2C', 'SPI', 'Serial'}
Show all properties

Specify Bluetooth Address

Connect an HC-05 with a Arduino Uno using Bluetooth.

a = arduino('btspp://98D331FB3B77')

a = 

  arduino with properties:

           DeviceAddress: 'btspp://98D331FB3B77'
                   Board: 'Uno' 
           AvailablePins: {'D2-D13', 'A0-A5'} 
    AvailableDigitalPins: {'D2-D13', 'A0-A5'} 
        AvailablePWMPins: {'D3', 'D5-D6', 'D9-D11'} 
     AvailableAnalogPins: {'A0-A5'} 
      AvailableI2CBusIDs: [0] 
               Libraries: {'I2C', 'Servo', 'SPI'}  
  Show all properties
               

Specify Bluetooth Address

Connect Nano 33 BLE, Nano 33 BLE Sense, Nano 33 IoT, MKR1010, ESP32-DevKitV1 or ESP32-DevKitC boards over Bluetooth 4.0 address which is the peripheral device's MAC address for Windows.

a = arduino('CA89D02FDC71')

a = arduino with properties: 

                  Name: 'IMUBLE'
               Address: 'CA89D02FDC71'
             Connected: 1
                 Board: 'Nano33BLE'
         AvailablePins: {'D0-D13', 'A0-A7'}
  AvailableDigitalPins: {'D0-D13', 'A0-A7'}
      AvailablePWMPins: {'D2-D6', 'D9-D12'}
   AvailableAnalogPins: {'A0-A3', 'A6-A7'}
    AvailableI2CBusIDs: [0,1]
AvailableSerialPortIDs: [1]
             Libraries: {'I2C'}
 
Show all properties

In Windows, you can also specify the address in the format CA:89:D0:2F:DC:71.

Specify Bluetooth Device Name

Connect an HC-06 with a Arduino Uno using Bluetooth.

a = arduino('HC-06')

a = 

  arduino with properties:

           DeviceAddress: 'HC-06'
                   Board: 'Uno' 
           AvailablePins: {'D2-D13', 'A0-A5'} 
    AvailableDigitalPins: {'D2-D13', 'A0-A5'} 
        AvailablePWMPins: {'D3', 'D5-D6', 'D9-D11'} 
     AvailableAnalogPins: {'A0-A5'} 
      AvailableI2CBusIDs: [0]
               Libraries: {'I2C', 'Servo', 'SPI'}
  Show all properties

Specify Bluetooth Formatted Address

Connect to an Arduino Nano 33 BLE using Bluetooth. The address format is of two types.

a = arduino('CA:89:D0:2F:DC:71')

a =
 
arduino with properties:
 
                  Name: 'IMUBLE'
               Address: 'CA89D02FDC71'
             Connected: 1
                 Board: 'Nano33BLE'
         AvailablePins: {'D0-D13', 'A0-A7'}
  AvailableDigitalPins: {'D0-D13', 'A0-A7'}
      AvailablePWMPins: {'D2-D6', 'D9-D12'}
   AvailableAnalogPins: {'A0-A3', 'A6-A7'}
    AvailableI2CBusIDs: [0,1]
AvailableSerialPortIDs: [1]
             Libraries: {'I2C'}
               

Specify IP Address to Connect to Arduino MKR1000 Board

Connect to an Arduino MKR1000 board using WiFi.

a = arduino('10.10.10.55','MKR1000')

a = 
  arduino with properties:

         DeviceAddress: '10.10.10.55'
                  Port: 9500
                 Board: 'MKR1000'
         AvailablePins: {'D0-D14', 'A0-A6'}
  AvailableDigitalPins: {'D0-D14', 'A0-A6'}
      AvailablePWMPins: {'D0-D8', 'D10', 'A3-A4'}
   AvailableAnalogPins: {'A0-A6'}
    AvailableI2CBusIDs: [0]
AvailableSerialPortIDs: [1]
             Libraries: {'I2C', 'SPI', 'Serial', 'Servo'}

Specify IP Address and TCP/IP Port to Connect to an Arduino MKR1000 Board

a = arduino('10.10.10.55','MKR1000',9500)

a = 
  arduino with properties:

         DeviceAddress: '10.10.10.55'
                  Port: 9500
                 Board: 'MKR1000'
         AvailablePins: {'D0-D14', 'A0-A6'}
  AvailableDigitalPins: {'D0-D14', 'A0-A6'}
      AvailablePWMPins: {'D0-D8', 'D10', 'A3-A4'}
   AvailableAnalogPins: {'A0-A6'}
    AvailableI2CBusIDs: [0]
AvailableSerialPortIDs: [1]
             Libraries: {'I2C', 'SPI', 'Serial', 'Servo'}

Connect to an Arduino Board on a Mac

Connect to an Arduino Uno on port /dev/tty.usbmodem1421.

a = arduino('/dev/tty.usbmodem1421','Uno')

a = 

  arduino with properties:

                    Port: '/dev/tty.usbmodem1421'
                   Board: 'Uno'
           AvailablePins: {'D2-D13', 'A0-A5'}
    AvailableDigitalPins: {'D2-D13', 'A0-A5'}
        AvailablePWMPins: {'D3', 'D5-D6', 'D9-D11'}
     AvailableAnalogPins: {'A0-A5'}
      AvailableI2CBusIDs: [0]
               Libraries: {'Adafruit/MotorShieldV2', 'I2C', 'SPI', 'Servo'}
  Show all properties

Connect to an Arduino Nano 33 BLE, Nano 33 BLE Sense, Nano 33 IoT, or a MKR1010 board over Bluetooth using a random 128 bit device address assigned by the macOS.

a = arduino('121B0BAC-0DE7-4FB1-909A-EEA6877DBC5C')

a =
 
arduino with properties:
 
                  Name: 'IMUBLE'
               Address: '121B0BAC-0DE7-4FB1-909A-EEA6877DBC5C'
             Connected: 1
                 Board: 'Nano33BLE'
         AvailablePins: {'D0-D13', 'A0-A7'}
  AvailableDigitalPins: {'D0-D13', 'A0-A7'}
      AvailablePWMPins: {'D2-D6', 'D9-D12'}
   AvailableAnalogPins: {'A0-A3', 'A6-A7'}
    AvailableI2CBusIDs: [0,1]
AvailableSerialPortIDs: [1]
             Libraries: {'I2C'}
 
Show all properties

Specify an Arduino Library

Limit the Arduino environment to use only an I2C library.

a = arduino('COM9','Uno','Libraries','I2C')

Updating server code on board Uno (COM9). This may take a few minutes.

a = 
  arduino with properties:

                  Port: 'COM9'
                 Board: 'Uno'
         AvailablePins: {'D2-D13', 'A0-A5'}
  AvailableDigitalPins: {'D2-D13', 'A0-A5'}
      AvailablePWMPins: {'D3', 'D5-D6', 'D9-D11'}
   AvailableAnalogPins: {'A0-A5'}
    AvailableI2CBusIDs: [0]
             Libraries: {'I2C'}
Show all properties

Limit the Arduino Environment to Use Only Two Libraries

Limit the Arduino environment to use only the servo and shift register libraries.

a = arduino('COM9','Uno',"Libraries",{"Servo","ShiftRegister"},'ForceBuildOn',true)

Updating server code on board Uno (COM9). This may take a few minutes.

a = 
  arduino with properties:

                  Port: 'COM9'
                 Board: 'Uno'
         AvailablePins: {'D2-D13', 'A0-A5'}
  AvailableDigitalPins: {'D2-D13', 'A0-A5'}
      AvailablePWMPins: {'D3', 'D5-D6', 'D9-D11'}
   AvailableAnalogPins: {'A0-A5'}
    AvailableI2CBusIDs: [0]
             Libraries: {'Servo', 'ShiftRegister'}
Show all properties

Specify Analog Reference Voltage

Set AnalogReference internally to 1.1 V

a = arduino('COM9','Uno','AnalogReferenceMode','internal','AnalogReference',1.1) 

Updating server code on board Uno (COM9). This may take a few minutes.

a = 
  arduino with properties:

                  Port: 'COM9'
                 Board: 'Uno'
         AvailablePins: {'D2-D13', 'A0-A5'}
  AvailableDigitalPins: {'D2-D13', 'A0-A5'}
      AvailablePWMPins: {'D3', 'D5-D6', 'D9-D11'}
   AvailableAnalogPins: {'A0-A5'}
    AvailableI2CBusIDs: [0]
             Libraries: {'Adafruit/BNO055', 'I2C'}
Show all properties

More About

Code Generation Using MATLAB Function Block

• Use arduino in a MATLAB Function block with the Simulink^® Support Package for Arduino Hardware to generate code that can be deployed on Arduino Hardware.

• Specifying arguments to create the arduino object is not supported in code generation. For more information see Deploy Arduino Functions to Arduino Hardware Using MATLAB Function Block.

Version History

Introduced in R2014b