AndroidLEDcontrol

Control LED from android using Bluetooth module and Arduino board

This app allows you to: Detect nearby bluetooth devices Pair to a bluetooth device (PIN code authentication might be required) Light up / Turn off all LEDs at once control the brightness of each LED separately ( 25 levels of brighteness ) Disconnect from a bluetooth device

You may need for this project android Studio, Arduino IDE, Bluetooth HC-05 module, arduino board. (connections are specified in comments of arduino code) so it is pretty easy :)

Actual equipment used for this project

Requirements: works on android ICE_CREAM_SANDWICH_MR1 (SDK LEVEL 15) or newer versions.

Arduino code

#include <SoftwareSerial.h>
#include <stdio.h>


int ledONE = 9;
int ledTWO = 2;
int ledTHREE = 3;


int bluetoothTX = 11 ;
int bluetoothRX = 10 ;
char receivedValue ;

SoftwareSerial bluetooth ( bluetoothTX, bluetoothRX );

void setup()
{
  Serial.begin(9600);  
  Serial.println("console> ");
  
  pinMode(ledONE, OUTPUT);
  pinMode(ledTWO, OUTPUT);
  pinMode(ledTHREE, OUTPUT);
 
  bluetooth.begin(115200);
  bluetooth.print("$$$");
  delay(100);
  bluetooth.println("U,9600,N");
  bluetooth.begin(9600);

}


void loop()
{
int brightness = 0;
int led = 0;
signed int data = 0;

 if( bluetooth.available() )
  {
    data = (int) bluetooth.read();
    Serial.println( data );                 // for debugging, show received data

      if(data == 26) 
      {
        allDown() ;
      }else if(data == 89)
      {
        allUp() ;
      }else{
        
      led = data / 100;                     // which led to select ?
      brightness = data % 100 ;             // 0 - 25 , LED brightness ( * 10 ) for actual value
           
    switch(led)                             // Now, let's select the right led.
    {
      
      case 0  : setLEDthree ( brightness * 10 );  break;
      case 1  : setLEDone ( brightness * 10 );    break;
      case 2  : setLEDtwo ( brightness * 10 );    break;
      default : setLEDthree ( brightness * 10 );  break;       // DO NOT know what to do ? must be led 3
      
    }
      }

    bluetooth.flush();                       // IMPORTANT clean bluetooth stream, flush stuck data

  }

}


// SHUT DOWN all leds
void allDown()
{
    digitalWrite(ledONE,  LOW ) ; 
     digitalWrite(ledTWO,  LOW ) ; 
      digitalWrite(ledTHREE,  LOW ) ; 
}

// ALL up now :)

void allUp()
{
    digitalWrite(ledONE,  HIGH) ; 
     digitalWrite(ledTWO,  HIGH ) ; 
     digitalWrite(ledTHREE,  HIGH ) ; 
}


void setLEDone(int brighteness)
{
 analogWrite(ledONE,  brighteness ) ; 
}

void setLEDtwo(int brighteness)
{
 analogWrite(ledTWO,  brighteness ) ; 
}

void setLEDthree(int brighteness)
{
 analogWrite(ledTHREE,  brighteness ) ; 
}

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LICENSE

Before using this software, please make sure that your project complies with the MIT license below.

Copyright (c) 2019 Taha HICHRI

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

CONTRIBUTE TO THIS PROJECT

All contribution to this project are welcome! Get involved by forking the source now!