Control LED RGB WS2812B using Bluetooth and Android

How to control LED RGB WS2812B (Neo Pixel/ Addressable LED) using Arduino, Bluetooth Modul HC05 and and Android Application made by MIT APP

Jun 11, 2020

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neo pixel

addressable led

ws2812b

Components and supplies

HC-05 Bluetooth Module

Arduino UNO

WS2812 Addressable LED Strip

Tools and machines

Soldering iron (generic)

Apps and platforms

MIT App Inventor

Arduino IDE

Project description

Code

arduino

1#include <Adafruit_NeoPixel.h>
2#ifdef __AVR__
3#include <avr/power.h>   
4#endif
5#define LED_PIN    2
6#define LED_COUNT 13
7Adafruit_NeoPixel   strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
8int k;
9int val;
10
11void   setup()
12{
13Serial.begin(9600);
14#if defined(__AVR_ATtiny85__) && (F_CPU ==   16000000)
15  clock_prescale_set(clock_div_1);
16#endif
17  strip.begin();           
18   strip.show();            
19  strip.setBrightness(50); 
20}
21
22void loop()
23{
24   if (Serial.available())
25  {
26   val = Serial.read();
27       if (val ==   'R') //Rainbow
28       {
29        rainbow(10); 
30       }
31       if (val   == 'r') // red
32       {
33        colorWipe(strip.Color(255, 0, 0), 50);    
34        }
35       if (val == 'g') // green
36       {
37        colorWipe(strip.Color(0,   255, 0), 50);    
38       }
39        if (val == 'b') // blue
40       {
41         colorWipe(strip.Color(0, 0, 255), 50);    
42       }
43        if (val   == 'w') // white
44       {
45        colorWipe(strip.Color(255, 255, 255), 50);   
46       }
47        if (val == 'y') //yellow
48       {
49        colorWipe(strip.Color(255,   255, 0), 50); 
50       }
51        if (val == 'm') //magenta
52       {
53         colorWipe(strip.Color(255, 0, 255), 50); 
54       }
55        if (val   == 'c') //cyan
56       {
57        colorWipe(strip.Color(0, 255, 255), 50); 
58        }
59        if (val == 'o') //off
60       {
61        colorWipe(strip.Color(0,   0, 0), 50); 
62       }
63  }  
64}
65  
66void rainbow(int wait) { 
67    for(long   firstPixelHue = 0; firstPixelHue < 5*65536; firstPixelHue += 256) {
68    for(int   i=0; i<strip.numPixels(); i++) { 
69    int pixelHue = firstPixelHue + (i * 65536L   / strip.numPixels());
70    strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
71     }
72    strip.show(); 
73    delay(wait);  
74  }
75}
76
77
78void colorWipe(uint32_t   color, int wait) {
79  for(int i=0; i<strip.numPixels(); i++) { 
80    strip.setPixelColor(i,   color);         
81    strip.show();                          
82    delay(wait);                            
83  }
84}
85
86

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>   
#endif
#define LED_PIN    2
#define LED_COUNT 13
Adafruit_NeoPixel   strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
int k;
int val;

void   setup()
{
Serial.begin(9600);
#if defined(__AVR_ATtiny85__) && (F_CPU ==   16000000)
  clock_prescale_set(clock_div_1);
#endif
  strip.begin();           
   strip.show();            
  strip.setBrightness(50); 
}

void loop()
{
   if (Serial.available())
  {
   val = Serial.read();
       if (val ==   'R') //Rainbow
       {
        rainbow(10); 
       }
       if (val   == 'r') // red
       {
        colorWipe(strip.Color(255, 0, 0), 50);    
        }
       if (val == 'g') // green
       {
        colorWipe(strip.Color(0,   255, 0), 50);    
       }
        if (val == 'b') // blue
       {
         colorWipe(strip.Color(0, 0, 255), 50);    
       }
        if (val   == 'w') // white
       {
        colorWipe(strip.Color(255, 255, 255), 50);   
       }
        if (val == 'y') //yellow
       {
        colorWipe(strip.Color(255,   255, 0), 50); 
       }
        if (val == 'm') //magenta
       {
         colorWipe(strip.Color(255, 0, 255), 50); 
       }
        if (val   == 'c') //cyan
       {
        colorWipe(strip.Color(0, 255, 255), 50); 
        }
        if (val == 'o') //off
       {
        colorWipe(strip.Color(0,   0, 0), 50); 
       }
  }  
}
  
void rainbow(int wait) { 
    for(long   firstPixelHue = 0; firstPixelHue < 5*65536; firstPixelHue += 256) {
    for(int   i=0; i<strip.numPixels(); i++) { 
    int pixelHue = firstPixelHue + (i * 65536L   / strip.numPixels());
    strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
     }
    strip.show(); 
    delay(wait);  
  }
}


void colorWipe(uint32_t   color, int wait) {
  for(int i=0; i<strip.numPixels(); i++) { 
    strip.setPixelColor(i,   color);         
    strip.show();                          
    delay(wait);                            
  }
}

Code

arduino

1#include <Adafruit_NeoPixel.h>
2#ifdef __AVR__
3#include <avr/power.h>  
4#endif
5#define LED_PIN    2
6#define LED_COUNT 13
7Adafruit_NeoPixel  strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
8int k;
9int val;
10
11void  setup()
12{
13Serial.begin(9600);
14#if defined(__AVR_ATtiny85__) && (F_CPU ==  16000000)
15  clock_prescale_set(clock_div_1);
16#endif
17  strip.begin();           
18  strip.show();            
19  strip.setBrightness(50); 
20}
21
22void loop()
23{
24  if (Serial.available())
25  {
26   val = Serial.read();
27       if (val ==  'R') //Rainbow
28       {
29        rainbow(10); 
30       }
31       if (val  == 'r') // red
32       {
33        colorWipe(strip.Color(255, 0, 0), 50);    
34       }
35       if (val == 'g') // green
36       {
37        colorWipe(strip.Color(0,  255, 0), 50);    
38       }
39        if (val == 'b') // blue
40       {
41        colorWipe(strip.Color(0, 0, 255), 50);    
42       }
43        if (val  == 'w') // white
44       {
45        colorWipe(strip.Color(255, 255, 255), 50);  
46       }
47        if (val == 'y') //yellow
48       {
49        colorWipe(strip.Color(255,  255, 0), 50); 
50       }
51        if (val == 'm') //magenta
52       {
53        colorWipe(strip.Color(255, 0, 255), 50); 
54       }
55        if (val  == 'c') //cyan
56       {
57        colorWipe(strip.Color(0, 255, 255), 50); 
58       }
59        if (val == 'o') //off
60       {
61        colorWipe(strip.Color(0,  0, 0), 50); 
62       }
63  }  
64}
65  
66void rainbow(int wait) { 
67    for(long  firstPixelHue = 0; firstPixelHue < 5*65536; firstPixelHue += 256) {
68    for(int  i=0; i<strip.numPixels(); i++) { 
69    int pixelHue = firstPixelHue + (i * 65536L  / strip.numPixels());
70    strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
71    }
72    strip.show(); 
73    delay(wait);  
74  }
75}
76
77
78void colorWipe(uint32_t  color, int wait) {
79  for(int i=0; i<strip.numPixels(); i++) { 
80    strip.setPixelColor(i,  color);         
81    strip.show();                          
82    delay(wait);                           
83  }
84}
85
86

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>  
#endif
#define LED_PIN    2
#define LED_COUNT 13
Adafruit_NeoPixel  strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
int k;
int val;

void  setup()
{
Serial.begin(9600);
#if defined(__AVR_ATtiny85__) && (F_CPU ==  16000000)
  clock_prescale_set(clock_div_1);
#endif
  strip.begin();           
  strip.show();            
  strip.setBrightness(50); 
}

void loop()
{
  if (Serial.available())
  {
   val = Serial.read();
       if (val ==  'R') //Rainbow
       {
        rainbow(10); 
       }
       if (val  == 'r') // red
       {
        colorWipe(strip.Color(255, 0, 0), 50);    
       }
       if (val == 'g') // green
       {
        colorWipe(strip.Color(0,  255, 0), 50);    
       }
        if (val == 'b') // blue
       {
        colorWipe(strip.Color(0, 0, 255), 50);    
       }
        if (val  == 'w') // white
       {
        colorWipe(strip.Color(255, 255, 255), 50);  
       }
        if (val == 'y') //yellow
       {
        colorWipe(strip.Color(255,  255, 0), 50); 
       }
        if (val == 'm') //magenta
       {
        colorWipe(strip.Color(255, 0, 255), 50); 
       }
        if (val  == 'c') //cyan
       {
        colorWipe(strip.Color(0, 255, 255), 50); 
       }
        if (val == 'o') //off
       {
        colorWipe(strip.Color(0,  0, 0), 50); 
       }
  }  
}
  
void rainbow(int wait) { 
    for(long  firstPixelHue = 0; firstPixelHue < 5*65536; firstPixelHue += 256) {
    for(int  i=0; i<strip.numPixels(); i++) { 
    int pixelHue = firstPixelHue + (i * 65536L  / strip.numPixels());
    strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
    }
    strip.show(); 
    delay(wait);  
  }
}


void colorWipe(uint32_t  color, int wait) {
  for(int i=0; i<strip.numPixels(); i++) { 
    strip.setPixelColor(i,  color);         
    strip.show();                          
    delay(wait);                           
  }
}

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