Introduction: PC Mouse Made With Arduino Uno and Joystick

Hi! Welcome to my first Instructable.

I recently began tinkering with my new Arduino Uno and decided to find an application for a PS2 joystick module. I thought it would be nifty to turn my Arduino into a joystick controlled mouse for my PC.

I must confess: I thought the task would be easy using the "mouse" library I found online, little did I realize that this class only works with Arduino Leonard and Micro (and perhaps a few others), but not the ubiquitous Uno. I was discouraged, but I decided to use the Uno's serial communication as well as my rudimentary Java abilities to "hack" the Uno into a functional mouse for Windows. It surprisingly worked! Here's how:

Step 1: Materials

Picture of Materials

This project does not require many materials:

1 Arduino Uno

5 male to male wires

5 female to female wires (to connect to joystick module and to add extension length for joystick.

1 Joystick (I used the SainSmart PS2 joystick module and would recommend it)

Step 2: Setting Up the Arduino Uno

The setup of the Uno can be seen in the materials picture, and here's the instructions:

Connect the five female to female wires to the pins of the joystick module. Now, connect five male to male wires into the ends of the female wires and connect them to the Arduino in this way:

1. The Ground on the joystick to Arduino Gnd

2. The +5V on the joystick to Arduino 5V

3. The UPx on the joystick to A0 on the Arduino

4. The UPy on the joystick to A1

5. The SW pin (the digital click switch) to digital pin 7 on the Arduino

Step 3: Upload the Joystick Program to Arduino

Connect the Uno to your PC and upload the joystick code seen here (please note I did not create this code originally):

int pushPin = 7;       	// potentiometer wiper (middle terminal) connected to analog pin 3
int xPin = 0;
int yPin = 1;
int xMove = 0;
int yMove = 0;
			// outside leads to ground and +5V
int valPush = HIGH;     // variable to store the value read
int valX = 0;
int valY = 0;
void setup()
	Serial.begin(9600);         //  setup serial

void loop()
	valX = analogRead(xPin);    // read the x input pin
	valY = analogRead(yPin);    // read the y input pin
	valPush = digitalRead(pushPin); // read the push button input pin
	Serial.println(String(valX) + " " + String(valY) + " " + valPush);    //output to Java program

Step 4: Setting Up Java Program

Now that the Uno is set up, we need to connect it to my Java program which is capable of taking the Uno's serial output values with the special library RxTx and moving the mouse with the library collection JNA. Both of these libraries are included for download at the end of this step. Please note that the only part of the code I changed from the example RxTx was adding the method that moves the mouse in a way that I calibrated for my joystick. It's a bit crude, but it served my purposes.

I used BlueJ as my IDE, but whichever Java IDE you use, install RxTx and JNA libraries for this project, which I named "Mouse". Once that's done, created a project and include this code:

import java.awt.*;
import java.awt.event.InputEvent; import; import; import; import; import; import; import; import java.util.Enumeration; public class Mouse implements SerialPortEventListener { SerialPort serialPort; /** The port we're normally going to use. */ private static final String PORT_NAMES[] = { "/dev/tty.usbserial-A9007UX1", // Mac OS X "/dev/ttyACM0", // Raspberry Pi "/dev/ttyUSB0", // Linux "COM4", // Windows**********(I changed) }; /** * A BufferedReader which will be fed by a InputStreamReader * converting the bytes into characters * making the displayed results codepage independent */ private BufferedReader input; /** The output stream to the port */ private OutputStream output; /** Milliseconds to block while waiting for port open */ private static final int TIME_OUT = 2000; /** Default bits per second for COM port. */ private static final int DATA_RATE = 9600; int buttonOld = 1; public void initialize() { // the next line is for Raspberry Pi and // gets us into the while loop and was suggested here was suggested //System.setProperty("", "/dev/ttyACM0"); I got rid of this CommPortIdentifier portId = null; Enumeration portEnum = CommPortIdentifier.getPortIdentifiers(); //First, Find an instance of serial port as set in PORT_NAMES. while (portEnum.hasMoreElements()) { CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement(); for (String portName : PORT_NAMES) { if (currPortId.getName().equals(portName)) { portId = currPortId; break; } } } if (portId == null) { System.out.println("Could not find COM port."); return; } try { // open serial port, and use class name for the appName. serialPort = (SerialPort), TIME_OUT); // set port parameters serialPort.setSerialPortParams(DATA_RATE, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE); // open the streams input = new BufferedReader(new InputStreamReader(serialPort.getInputStream())); output = serialPort.getOutputStream(); // add event listeners serialPort.addEventListener(this); serialPort.notifyOnDataAvailable(true); } catch (Exception e) { System.err.println(e.toString()); } } /** * This should be called when you stop using the port. * This will prevent port locking on platforms like Linux. */ public synchronized void close() { if (serialPort != null) { serialPort.removeEventListener(); serialPort.close(); } } /** * Handle an event on the serial port. Read the data and print it. In this case, it calls the mouseMove method. */ public synchronized void serialEvent(SerialPortEvent oEvent) { if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) { try { String inputLine=input.readLine(); mouseMove(inputLine); System.out.println("********************"); //System.out.println(inputLine); } catch (Exception e) { System.err.println(e.toString()); } } // Ignore all the other eventTypes, but you should consider the other ones. } public static void main(String[] args) throws Exception { Mouse main = new Mouse(); main.initialize(); Thread t=new Thread() { public void run() { //the following line will keep this app alive for 1000 seconds, //waiting for events to occur and responding to them (printing incoming messages to console). try {Thread.sleep(1000000);} catch (InterruptedException ie) {} } }; t.start(); System.out.println("Started"); } // My method mouseMove, takes in a string containing the three data points and operates the mouse in turn public void mouseMove(String data) throws AWTException { int index1 = data.indexOf(" ", 0); int index2 = data.indexOf(" ", index1+1); int yCord = Integer.valueOf(data.substring(0, index1)); int xCord = Integer.valueOf(data.substring(index1 + 1 , index2)); int button = Integer.valueOf(data.substring(index2 + 1)); Robot robot = new Robot(); int mouseY = MouseInfo.getPointerInfo().getLocation().y; int mouseX = MouseInfo.getPointerInfo().getLocation().x; if (button == 0) { if (buttonOld == 1) { robot.mousePress(InputEvent.BUTTON1_DOWN_MASK); robot.delay(10); } } else { if (buttonOld == 0) robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK); } if (Math.abs(xCord - 500) > 5) mouseX = mouseX + (int)((500 - xCord) * 0.02); if (Math.abs(yCord - 500) > 5) mouseY = mouseY - (int)((500 - yCord) * 0.02); robot.mouseMove(mouseX, mouseY); buttonOld = button; System.out.println(xCord + ":" + yCord + ":" + button + ":" + mouseX + ":" + mouseY); return; } }

Step 5: Troubleshooting

Getting the Java program to work may be difficult. I've got some tips if you're stuck:

-Change the "Com4" string in the PORT_NAMES[] to the port your arduino Uno is connected to. (I changed to Com4 from the default Com3 in my Java program)

-Comment out the line relating to Raspberry Pi (if you copied my program, I already did this)

-Click "Rebuild Package" or your IDEs equivalent

-Reset the Java Virtual Machine in your IDE. Maybe even reset the program before using the mouse the first time.

Step 6: Conclusion

Picture of Conclusion

I hope this project works for you and that you can improve upon it. Ultimately, the easiest solution is to use an Arduino Leonard or Mini that can function as a system device for mouse inputs, but I found it fun to make the Uno function in a way it was not designed--a mouse--by using my limited Java knowledge.

I learned a lot alone the way and hope to add several features in the future:

-Right Click button. The joystick has one button which I reserved for the left click.

-Real device driver for this project. I'm not sure if this is possible, maybe someone can enlighten me on the subject!

Thanks for reading!


mgnKiwi (author)2017-11-06

How do you connect the Arduino to the computer to control it? With USB?

Just need clarificaiton.

millerr1 (author)2017-10-10

How do you connect the Java program to the Arduino?

JamesG185 (author)2017-09-09

"package does not exist"

Battles1 (author)2017-08-22

How exactly do I connect the Java program to the Arduino program? I have the Arduino code working (confirmed this by opening the Serial Monitor) and have compiled the program using BlueJ (as well as package it in a JAR file). Is their anything I'm missing?

gilberertor (author)2017-04-26

how do i doit work

i have the java program compile and the arduino code flashed on the board

gilberertor (author)2017-04-26

i just copiet

gilberertor (author)2017-04-26

how do i compile the code in jblue it's giving me an allot of error

jerrySheen (author)2017-04-04

nice idea !i think you can add "grove gesture" so that some operate like web view will be simpler :)

that's what i want to make ,one hand for joystick and the other for gesture~

periprohus (author)2017-02-25

Very nice!

arduino_nano (author)2016-11-08

its posible to do this movements automatic without joystick? anyone can respone please i need this for a important project thanks

makeosaurus (author)2016-03-20

If you needed it just to use it as a usb controller for games you could use a project called Unojoy if you wanted to!

Syntaxian (author)makeosaurus2016-03-22

Thanks for the recommendation! Unojoy might work for this, but I wanted to make my own way to connect to enter any computer or keyboard input using a simple java program, so I like the flexibility and simplicity my project gives. I'll have to check out unojoy later, though

DIY Hacks and How Tos (author)2016-03-20

Nice basic joystick design. I can think of a lot of projects to use this on.

Thanks! I hope you can make use of the ideas and adapt it to any of your input needs.

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