Overview
Things
Story

Problem
Solution
About the thing
How to connect
Warning
Youtube vid

Published April 17, 2022

Arduino HID Media Controller

Can control media in pc by distance with come knobs and switches

IntermediateFull instructions provided1 hour1,190

Things used in this project

Hardware components

Rotary Encoder with Push-Button

SparkFun Pushbutton switch 12mm

HC-05 Bluetooth Module

Arduino Nano R3

Linear Regulator (7805)

9V battery (generic)

9V Battery Clip

Jumper wires (generic)

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)

Solder Wire, Lead Free

Hot glue gun (generic)

Story

Problem:

So my desk is in the corner of the room and I have a 5.1 music system so I can't feel it unless I'm sitting on the sofa.
But after sitting on the sofa I have to go to my desk to change the song or to change the volume and or EQ on my laptop as my music system is wired.

Solution:

I build an HID (Human Interface Devices) Media Controller with Arduino which can connect to the laptop wireless via Bluetooth.
so with this, I can control volume, change track, pause add a bass filter, and many more.

About the thing:

so it got a rotary encoder with a switch to control vol.

and some switches to change track and pause.

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so if I press leftmost for 1 sec it will play the previous track and if I press it for 2 sec it will open my music playlist.
and if I press the middle one for 1 sec it will pause the track if I will pres for 2 sec it will add a bass filter.
and if I press the rightmost button it will play the next track.
and to make it portable I'm powering it up with a 9v bat but to convert it to 5v for Arduino I used a 7805 Voltage Regulator.

1 / 2

and here is the full thing

1 / 2

How to connect:

first power up the Arduino.
then look at the Bluetooth module led is blinking without delay this means it's not connected.
open Bluetooth on pc( I'm using win 8.1 pc).

pair and connect to the module passcode is 0000 or 1234.
after this look at the Bluetooth module, the led is blinking with a delay then which means it's connected to pc.
then we need to find the port for this search for devices and printers and open it.

then fond Bluetooth module there and right-click on it and open properties.

then go to services to know the port.

then put the port here in code.

m5 = serial.Serial('COM8', 9600, timeout=.1)

so now the setup is complete run the python program.
Click here to get detailed vid

Warning:

if your going with the circuit given the please remove pullup from Arduino code.

Youtube vid:

Code

#define CLK 6
 #define DT 4
 float presslen = 0;
 float presslen1 = 0;
 int one1 = 100;
 int two2 = 2000;        
 int btn = 8;
 int btn2 = 9;
 int btn3 = 7;
 int btn4 = 5;
 int counter = 0; 
 int currentCLK;
 int previousCLK; 

  void setup() { 
   pinMode (CLK,INPUT);
   pinMode (DT,INPUT);
   pinMode (btn,INPUT_PULLUP);
   pinMode (btn2,INPUT_PULLUP);
   pinMode (btn3,INPUT_PULLUP);
   pinMode (btn4,INPUT_PULLUP);// button on encdir
   Serial.begin (9600);
   previousCLK = digitalRead(CLK);
 } 
 void loop() { 
   currentCLK = digitalRead(CLK);
   if (currentCLK != previousCLK){ 
     if (digitalRead(DT) != currentCLK) { 
       counter --;
       delay(100);
       Serial.println("N");
     } else{
       counter ++;
       delay(100);
       Serial.println("P");   
     }
   } 
   
   while (digitalRead(btn) == LOW){ 
    delay(100);  
    presslen = presslen + 100;   
  } 
  while (digitalRead(btn3) == LOW){ 
    delay(100);  
    presslen1 = presslen1 + 100;   
  } 
  if (presslen >= two2){
  Serial.println("B");// for BASS FILTER
  } 
  else if(presslen >= one1){
  Serial.println("S");// for pause
  }
  if (presslen1 >= two2){
  Serial.println("Z");
  } 
  else if(presslen1 >= one1){
  Serial.println("O");
  }
  if (digitalRead(btn2) == LOW){
  Serial.println("F");
  delay(500);// for forward
  } 
  if (digitalRead(btn4) == LOW){
  Serial.println("M");
  delay(500);// for MUTE
  } 
  presslen = 0;
  presslen1 = 0; 
  //Serial.println("TEST PASS");
 }

import serial
import time
import webbrowser
import pyautogui
m5 = serial.Serial('COM5', 9600, timeout=.1)
while True:
    da = m5.readline()[:-2]
    if da == b'P':
        pyautogui.press('volumeup')
    elif da == b'N':
        pyautogui.press('volumedown')
    elif da == b'M':
        pyautogui.press('volumemute')
    elif da == b'O':
        pyautogui.keyDown('shift')
        pyautogui.press('p')
        pyautogui.keyUp('shift')
    elif da == b'Z':
        webbrowser.open('https://www.youtube.com/watch?v=0t3WxzxcUEk&list=RD0t3WxzxcUEk&index=1')
    elif da == b'S':
        pyautogui.press('k')
    elif da == b'F':
        pyautogui.keyDown('shift')
        pyautogui.press('n')
        pyautogui.keyUp('shift')
    elif da == b'B':
        pyautogui.click(x=1261, y=1052)
        time.sleep(2)
        pyautogui.click(x=1427, y=95)
        time.sleep(1)
        pyautogui.click(x=1376, y=479)
        time.sleep(1)
        pyautogui.click(x=1352, y=762)
        time.sleep(1)
        pyautogui.click(x=62, y=535)

Credits

Amaan Javed

19 projects • 4 followers

Student

Arduino HID Media Controller

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Problem:

Solution:

About the thing:

How to connect:

Warning:

Youtube vid:

Schematics

circuit diagram

Code

Arduino code

Python code

Credits

Amaan Javed

Comments

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Arduino HID Media Controller

Arduino HID Media Controller

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Problem:

Solution:

About the thing:

How to connect:

Warning:

Youtube vid:

Schematics

circuit diagram

Code

Arduino code

Python code

Credits

Amaan Javed

Comments

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