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Joystick Module

Overview

A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks are often used to control video games and robots. A Joystick PS2 is used here.

Required Components

In this project, we need the following components.

It’s definitely convenient to buy a whole kit, here’s the link:

Name	ITEMS IN THIS KIT	LINK
Elite Explorer Kit	300+	Elite Explorer Kit

You can also buy them separately from the links below.

COMPONENT INTRODUCTION	PURCHASE LINK
Arduino Uno R4 WiFi	-
Breadboard	BUY
Jumper Wires	BUY
Joystick Module	BUY

Wiring

Schematic Diagram

This module has two analog outputs (corresponding to X,Y biaxial offsets).

In this experiment, we use the Uno board to detect the moving direction of the Joystick knob.

Code

Note

• You can open the file 20-joystick.ino under the path of elite-explorer-kit-main\basic_project\20-joystick directly.

• Or copy this code into Arduino IDE.

20-joystick.ino

/*
  The code reads values from a joystick module and prints them on the serial monitor. 
  The joystick module has two analog axes (X and Y), which are connected to Arduino 
  pins A0 and A1. The decimal form of the X and Y axis values is read and displayed 
  on the serial monitor.

  Board: Arduino Uno R4 
  Component: Joystick Module
*/

const int xPin = A0;  //the VRX attach to
const int yPin = A1;  //the VRY attach to
const int swPin = 8;  //the SW attach to

void setup() {
  pinMode(swPin, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  Serial.print("X: ");
  Serial.print(analogRead(xPin), DEC);  // print the value of VRX in DEC
  Serial.print("|Y: ");
  Serial.print(analogRead(yPin), DEC);  // print the value of VRX in DEC
  Serial.print("|Z: ");
  Serial.println(digitalRead(swPin));  // print the value of SW
  delay(50);
}

Now, when you push the rocker, the coordinates of the X and Y axes displayed on the Serial Monitor will change accordingly. Pressing the button will also display the coordinate Z=0.

Code Analysis

The code is use the serial monitor to print the value of the VRX and VRY pins of the joystick ps2.

void loop()
{
    Serial.print("X: ");
    Serial.print(analogRead(xPin), DEC);  // print the value of VRX in DEC
    Serial.print("|Y: ");
    Serial.print(analogRead(yPin), DEC);  // print the value of VRX in DEC
    Serial.print("|Z: ");
    Serial.println(digitalRead(swPin));  // print the value of SW
    delay(50);
}