Interface the media player with using motion senor

Using Arduino Sensors
1

Hi everyone. I am just a beginner in Arduino and our team is planning to design an art, which use the motion to trigger the video play or pause. I will explain more in here. Basically when the man walk pass the sensors, the video will start to play. When the man stop, the video will pause, til the man man walk again and the video resume playing.

The material we preferred in this project is:
Arduino UNO R3, some PIR sensor, wires, USB cable, PC with monitor(to show the video)

I had done some research for the similar project and someone said Processing can be used in this type of project, which communicating with Arduino and the motion sensors and hacking the media player to set play or pause. Interfacing with media player
However I cannot find any resources or reference. We are asking someone to teach us how to make it well for this project.

We are appreciate for your help:D Thank you.

2

You can emulate keypresses with an Arduino Micro or Arduino Leonardo.

https://www.arduino.cc/en/Reference/MouseKeyboard

Send the play key when there is movement and send the pause key when there is no movement.

3

Lennyz1988:
You can emulate keypresses with an Arduino Micro or Arduino Leonardo.

https://www.arduino.cc/en/Reference/MouseKeyboard

Send the play key when there is movement and send the pause key when there is no movement.

It's a huge thank to you. You help me so much

The sensor and Leonardo are working! However we get another problem.

which is: When the PIR sensor sense the movement, the keyboard press 3 times for each movement.

4

Do you use a state machine for the PIR.

If oldPIRstate was LOW and goes HIGH >> press play.

If oldPIRstate was HIGH and goes LOW >> press pause.

Leo..

5

#include <Keyboard.h>
int ledPin = 13;
int inputPin = 2;
int pirState = LOW;
int val = 0;
void setup() {
pinMode(ledPin, OUTPUT); // LED as output
pinMode(inputPin, INPUT); // Sensor as input
Serial.begin(115200);
Keyboard.begin();
}

void loop(){

val = digitalRead(inputPin);
if ( val == HIGH) {
digitalWrite(ledPin, HIGH);
Keyboard.press(0x20); //spacebar
delay(100);
Keyboard.releaseAll();
// wait for new window to open:

} else {
digitalWrite(ledPin, LOW);
}
delay(5000);
}

Hi Wawa, what's mean by state machine?

6

Not a good coder, but try this (untested).
You still have to fill in the keyboard commands.
If you use the common PIR (with two pots), turn the "time" fully counter clockwise, and leave the sensitivity pot in the middle.
Leo..

#include <Keyboard.h>
const byte pirPin = 2;
const byte ledPin = 13;
boolean pirValue = 0;
boolean pirState = 0;

void setup() {
  Keyboard.begin();
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT); // LED output
}

void loop() {
  pirValue = digitalRead(pirPin);
  if (pirValue && !pirState) { // if PIR goes high and pirstate was low
    digitalWrite(ledPin, HIGH); // indicator LED on
    // keyboard play code here
    pirState = HIGH; // so it does not play again
  }
  if (!pirValue && pirState) { // if PIR goes low and pirState was high
    digitalWrite(ledPin, LOW); // indicator LED off
    //keyboard pause code here
    pirState = LOW; // so it does not pause again
  }
}
7

You are using "Keyboard.press" while you should be using "Keyboard.write" in this case. You should use Keyboard.press when you want to press multiple keys at the same time (for example CTRL + P). For only pressing one key and releasing it, then you should use Keyboard.write.

8

Lennyz1988:
You are using "Keyboard.press" while you should be using "Keyboard.write" in this case. You should use Keyboard.press when you want to press multiple keys at the same time (for example CTRL + P). For only pressing one key and releasing it, then you should use Keyboard.write.

Thank you. We will try for it.