Play Block Breaker(Unity3D) With Arduino Ultrasonic Sensor




Introduction: Play Block Breaker(Unity3D) With Arduino Ultrasonic Sensor

About: Hi eveyone, my name is Raed, I'm a computer science student from Jordan, I'm passionate about learning and developing mobile games in Unity3D. I love to explore new ways and methods such as sensors as inputs f…

in this instructable I will be showing you guys how to make a block breaker game and play it using an ultrasonic sensor from arduino which will be used as a proximity detector to moe our paddle left and right

you can follow the youtube playist provided , have fun :)

Step 1: Get Your Tools!

you will need

1- Ultrasonic sensor

2- 4 male to female wires

3- a flat surface tool, could be a book, I used a toy racket

Step 2: Connect Your Components

simple connect a ground and 5 volt wires to your ultrasonic and attach 2 wires to your Trig and Echo ports, I used pins 4 and 5 respectivley

Step 3: Lets Code Arduino :)

we need to alternate between making sound(Trig) and receiving sound(Echo) to measure the distance using the following formula

distance in cm = calculatedTime * 343.2 / 20000;

and use the following code:

const int TRIG = 5;
const int ECHO = 4;

void setup (){ Serial.begin(9600); pinMode(TRIG, OUTPUT); pinMode(ECHO, INPUT); }

void loop (){ int data = GetUltra(TRIG,ECHO); Serial.write( data ); delay(20);


double GetUltra ( int trig , int echo){

digitalWrite(trig , LOW); delayMicroseconds(2); digitalWrite(trig, HIGH); delayMicroseconds(8); digitalWrite(trig, LOW);

double distance = ( pulseIn(echo, HIGH) )* 343.2 / 20000; return distance; }

Step 4: Determine the Range of Motion

int this part we want to determine what is the distance from and to the ultrasonic that will correspond to the play field in unity, in other words, at what distance away from the ultra sonic I want the paddle to reach left most corner and at what distance I want the paddle to be at the right most corner

I choose 5-25 cm

Step 5: Lets Code in Unity!

please watch the video in the perivous step for instructions, or you can find a tutorial on youtube how to make a paddle move in blockbreaker

Step 6: Lets Receive Data From Arduino and Move Our Paddle :)

the final code in unity :

using UnityEngine;
using System.Collections; using System.IO.Ports; public class paddel1 : MonoBehaviour { public float distance;

SerialPort stream = new SerialPort(@"\\.\"+"COM11",9600); // Use this for initialization void Start () { stream.Open(); stream.ReadTimeout = 25; } // Update is called once per frame void Update () {

Vector2 temp = transform.position; if (stream.IsOpen) {

try {

float data = stream.ReadByte();

data = Mathf.Clamp(data, 5, 25);

data -= 5; data /= 20; data *= 10; data -= 5;

temp.x = data;

} catch (System.Exception) {



transform.position = temp;


} }

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    6 Discussions


    Question 2 years ago on Step 6

    how to add jump mechanic to this code...


    3 years ago

    how did you set the range in arduino? it's not clear how (or even if) you did. !


    4 years ago

    Great Potential. Subscribed to your channel.

    i also like to make application with arduino and unity.

    Keep it up.


    Reply 4 years ago

    You're absolutely right, the ultrasonic can provide an amazing experience as an input device for games, I've seen a demo on youtube where a guy is controlling flappy bird by hovering over the ultrasonic, that was very interesting.

    I have a couple of other ideas of my own that i will be making soon ;) mean while you can check my last instructable which is how to use a barometer pressure sensor to play flappy bird .

    thanks, i really appreciate your sub, and I will be checking yours too :)


    Reply 4 years ago