I need help converting this code from Arduino to Matlab

const int MOTION_PIN = 2; // Pin connected to motion detector const int LED_PIN = 13; // LED pin - active-high

void setup() { Serial.begin(9600); // The PIR sensor's output signal is an open-collector, // so a pull-up resistor is required: pinMode(MOTION_PIN, INPUT_PULLUP); pinMode(LED_PIN, OUTPUT); }

void loop() { int proximity = digitalRead(MOTION_PIN); if (proximity == LOW) // If the sensor's output goes low, motion is detected { digitalWrite(LED_PIN, HIGH); Serial.println("Motion detected!"); } else { digitalWrite(LED_PIN, LOW); } }

Answer 1

[Yukthi S]

Hello Kara,

To convert the given Arduino C/C++ code into MATLAB code, follow the steps mentioned below:

Step-1: Open MATLAB, go to Home tab, click on Add-ons and install the MATLAB Support Package for Arduino Hardware.

Step-2: Establish the connection between MATLAB and Arduino hardware board using “arduino” object.

https://www.mathworks.com/help/matlab/supportpkg/arduino.html#d126e19700

Step-3: Define the pins and configure them as inputs and outputs using “configurePin”.

https://www.mathworks.com/help/matlab/supportpkg/arduinoio.configurepin.html#bus7qlz-7:~:text=example-,configurePin(a%2Cpin%2Cmode),-sets%20the%20specified

Step-4: Replace “digitalRead” with “readDigitalPin” and “digitalWrite” with “writeDigitalPin” in the Arduino C/C++ code.

Syntax format and more information is given in the documentation below:

readDigitalPin: https://www.mathworks.com/help/matlab/supportpkg/arduinoio.readdigitalpin.html#:~:text=readDigitalPin(a%2Cpin)-,Description,-example

writeDigitalPin:

https://www.mathworks.com/help/matlab/supportpkg/arduinoio.writedigitalpin.html#:~:text=a%2Cpin%2Cvalue)-,Description,-example

Here is the rough conversion of Arduino C/C++ code to MATLAB code to get started:

% Create an Arduino object
a = arduino('port_name', 'board_name'); 

% Define pins
motionPin = 'D2'; % Pin connected to motion detector
ledPin = 'D13';   %LED pin - active-high

% Configure pins
configurePin(a, motionPin, 'DigitalInput');
configurePin(a, ledPin, 'DigitalOutput');

% Main loop
while true
    % Read the motion sensor
    proximity = readDigitalPin(a, motionPin);
    
    if proximity == 0 %If the sensor's output goes low, motion is detected
        writeDigitalPin(a, ledPin, 1); % Turn on the LED
        disp('Motion detected!');
    else
        writeDigitalPin(a, ledPin, 0); % Turn off the LED
    end
end

Hope you find this helpful!