How To Make Wireless RGB LED Matrix Text Display

2 Jun

How To Make Wireless RGB LED Matrix Text Display

Create your own RGB LED Matrix Text Display with this comprehensive DIY tutorial! Perfect for tech enthusiasts and hobbyists, this video will guide you through each step, from selecting the right components to programming and assembling your LED matrix. Watch as we break down the entire process in an easy-to-understand way, helping you bring vibrant, customizable text displays to life. Enhance your projects and impress your friends with this exciting LED project.

Diagram:

Components:

RGB 8×8 WS2812 LED Matrix : https://roboman.in/wgis
ESP32 Module : https://roboman.in/ur20
XL4015 Buck Converter : https://roboman.in/81ea
DC Socket : https://roboman.in/xezf

Code:

#include <BluetoothSerial.h>
#include "Arduino.h"
#include <Wire.h>//Include libraries: SoftwareSerial & Wire
BluetoothSerial ESP_BT; //Define PIN11 & PIN12 as RX and TX pins

//#include "BluetoothSerial.h"


//BleSerial ble;

#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#include <EEPROM.h>
#define EEPROM_SIZE 512

#ifndef PSTR
 #define PSTR // Make Arduino Due happy
#endif

#define PIN 5

// MATRIX DECLARATION:
// Parameter 1 = width of NeoPixel matrix
// Parameter 2 = height of matrix
// Parameter 3 = pin number (most are valid)
// Parameter 4 = matrix layout flags, add together as needed:
//   NEO_MATRIX_TOP, NEO_MATRIX_BOTTOM, NEO_MATRIX_LEFT, NEO_MATRIX_RIGHT:
//     Position of the FIRST LED in the matrix; pick two, e.g.
//     NEO_MATRIX_TOP + NEO_MATRIX_LEFT for the top-left corner.
//   NEO_MATRIX_ROWS, NEO_MATRIX_COLUMNS: LEDs are arranged in horizontal
//     rows or in vertical columns, respectively; pick one or the other.
//   NEO_MATRIX_PROGRESSIVE, NEO_MATRIX_ZIGZAG: all rows/columns proceed
//     in the same order, or alternate lines reverse direction; pick one.
//   See example below for these values in action.
// Parameter 5 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_GRBW    Pixels are wired for GRBW bitstream (RGB+W NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)


// Example for NeoPixel Shield.  In this application we'd like to use it
// as a 5x8 tall matrix, with the USB port positioned at the top of the
// Arduino.  When held that way, the first pixel is at the top right, and
// lines are arranged in columns, progressive order.  The shield uses
// 800 KHz (v2) pixels that expect GRB color data.


//Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(
 // 32,                                              //Select LEDs of each row (15 in my case) 
 // 8,                                               //Select amount of rows (7 in my case)
 // PIN,                                                
 // NEO_MATRIX_BOTTOM + NEO_MATRIX_RIGHT +           //Define first data pin (right bottom corner is my first pin)
 // NEO_MATRIX_ROWS + NEO_MATRIX_ZIGZAG,             //Define the type of connection (in a zig zag connections and divided by rows not columns)
//  NEO_RGB            + NEO_KHZ800);

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(32, 8, PIN,
  NEO_MATRIX_TOP     + NEO_MATRIX_RIGHT +
  NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE,
  NEO_RGB            + NEO_KHZ800);



  int Red=255,Green=0,Blue=0;
  String text="Easy Tech";
  String RGB;
  int pixelPerChar = 5,RGB_Completed=0;
  int Delay, Brightness;
const uint16_t colors[] = {matrix.Color(Green,Red,Blue)};

//  matrix.Color(255, 0, 0), matrix.Color(0, 255, 0), matrix.Color(0, 0, 255) };//matrix.Color(Red, Green, Blue),


void setup() {
  
  Serial.begin(115200);
  ESP_BT.begin("RGB LED DISPLAY");
 EEPROM.begin(EEPROM_SIZE);
 initdata();
 // Serial.println("Start");
  const uint16_t colors[] = {matrix.Color(Green,Red,Blue)};
  matrix.begin();
  matrix.setTextWrap(false);
  matrix.setBrightness(Brightness);
  matrix.setTextColor(colors[0]);
 //matrix.setTextColor(matrix.Color(Green,Red,Blue));
}

int x    = matrix.width();
int pass = 0;

void loop() {



  while(ESP_BT.available()){
    char ReadChar = (char)ESP_BT.read();
     Serial.println(ReadChar);
 
    // Right parentheses ) indicates complet of the string
    if(ReadChar == ')' ||ReadChar == '}' || ReadChar == ']'){
      if(ReadChar == ')' ){
      RGB_Completed = 1;
       }
      if(ReadChar == '}'){
       RGB_Completed = 2;
      }
      if(ReadChar == ']'){
       RGB_Completed = 3;
      }
    }
    else{
       RGB += ReadChar;
    }
    
  
  }
  if(RGB_Completed!=0){
      if(RGB_Completed==1){
             Light_RGB_LED();
             RGB_Completed=0;
         }
      if (RGB_Completed==2){
          text=RGB;
           int _size = text.length();
            int i;
          for(i=0;i<_size;i++)
         {
       EEPROM.write(50+i,text.charAt(i));
       Serial.println(text.charAt(i));
           }
      EEPROM.write(50+_size,'\0');   //Add termination null character for String Data
     
           RGB_Completed=0;
           RGB="";
        }
      if (RGB_Completed==3){
        int val=RGB.toInt();
        if(val>0 && val<=100){
          if(val==0){
            val=1;
          }
          Delay=(100-val)*2.5;
          //scroll(Delay);
          EEPROM.write(0,Delay);
        }
        else{
          val=val-100;
          matrix.setBrightness(val);
          EEPROM.write(5,val);
        }
       
        RGB=""; 
        RGB_Completed=0;
      }
    }

   if(RGB_Completed==0){
  //.  Serial.println(RGB_Completed);
    scroll();
  }

}

void scroll(){
  //Serial.println(text);
  int  maxDisplacement = text.length() * pixelPerChar + matrix.width();
  matrix.fillScreen(0);
  matrix.setCursor(x, 0);
  
  matrix.print(text);
  if(--x < -maxDisplacement) {
    x = matrix.width();
  
    if(++pass >= 1){ pass = 0;
   // matrix.setTextColor(colors[pass]);
     matrix.setTextColor(matrix.Color(Green,Red,Blue));
    //  matrix.setTextColor(matrix.Color(Red,Green,Blue));
    }
  }
  
  matrix.show();
  delay(Delay);
  
}



void Light_RGB_LED(){
 
  int SP1 = RGB.indexOf('.');
  int SP2 = RGB.indexOf('.', SP1+1);
  int SP3 = RGB.indexOf('.', SP2+1);
  String R = RGB.substring(0, SP1);
  String G = RGB.substring(SP1+1, SP2);
  String B = RGB.substring(SP2+1, SP3);
  Red=R.toInt();Green=G.toInt();Blue=B.toInt();
// Serial.println(R);
 matrix.setTextColor(matrix.Color(Green,Red,Blue));
  EEPROM.write(10,Red);EEPROM.write(15,Green);EEPROM.write(20,Blue);
 RGB="";
 
}


void initdata(){

     int Speed=EEPROM.read(0);
     if(Speed==NULL || Speed==0){
      Delay=100;
       }
       else{
        Delay=Speed;
       }

    int bright=  EEPROM.read(5); 
     if(bright==NULL || bright==0){
      Brightness=40;
       }
       else{
        Brightness=bright;
       }

    int r=  EEPROM.read(10); 
     if(r==NULL){
        Red=0;
       }
       else{
        Red=r;
       }

    int g=  EEPROM.read(15); 
     if(g==NULL){
        Green=255;
       }
       else{
        Green=g;
       }

   int b=  EEPROM.read(20); 
     if(b==NULL){
        Blue=0;
       }
       else{
        Blue=b;
       }
  char data[100]; //Max 100 Bytes
   int len=0;
    char k;
   String Text= "";
  k=EEPROM.read(50);
  while(k != '\0' && len<500)   //Read until null character
  {    
    k=EEPROM.read(50+len);
    data[len]=k;
    Text+=k;
    len++;
  }
  data[len]='\0';
   
     if(Text==NULL){
        text="EASY TECH";
       }
       else{
        text=Text;
       }
Serial.println(Speed);
Serial.println(Brightness);
Serial.println(Red);
Serial.println(Green);
Serial.println(Blue);
Serial.println(text);
 
  }

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#include <BluetoothSerial.h>

#include "Arduino.h"

#include <Wire.h>//Include libraries: SoftwareSerial & Wire

BluetoothSerial ESP_BT; //Define PIN11 & PIN12 as RX and TX pins

//#include "BluetoothSerial.h"

//BleSerial ble;

#include <Adafruit_GFX.h>

#include <Adafruit_NeoMatrix.h>

#include <Adafruit_NeoPixel.h>

#include <EEPROM.h>

#define EEPROM_SIZE 512

#ifndef PSTR

#define PSTR // Make Arduino Due happy

#endif

#define PIN 5

// MATRIX DECLARATION:

// Parameter 1 = width of NeoPixel matrix

// Parameter 2 = height of matrix

// Parameter 3 = pin number (most are valid)

// Parameter 4 = matrix layout flags, add together as needed:

// NEO_MATRIX_TOP, NEO_MATRIX_BOTTOM, NEO_MATRIX_LEFT, NEO_MATRIX_RIGHT:

// Position of the FIRST LED in the matrix; pick two, e.g.

// NEO_MATRIX_TOP + NEO_MATRIX_LEFT for the top-left corner.

// NEO_MATRIX_ROWS, NEO_MATRIX_COLUMNS: LEDs are arranged in horizontal

// rows or in vertical columns, respectively; pick one or the other.

// NEO_MATRIX_PROGRESSIVE, NEO_MATRIX_ZIGZAG: all rows/columns proceed

// in the same order, or alternate lines reverse direction; pick one.

// See example below for these values in action.

// Parameter 5 = pixel type flags, add together as needed:

// NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)

// NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)

// NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products)

// NEO_GRBW Pixels are wired for GRBW bitstream (RGB+W NeoPixel products)

// NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)

// Example for NeoPixel Shield. In this application we'd like to use it

// as a 5x8 tall matrix, with the USB port positioned at the top of the

// Arduino. When held that way, the first pixel is at the top right, and

// lines are arranged in columns, progressive order. The shield uses

// 800 KHz (v2) pixels that expect GRB color data.

//Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(

// 32, //Select LEDs of each row (15 in my case)

// 8, //Select amount of rows (7 in my case)

// PIN,

// NEO_MATRIX_BOTTOM + NEO_MATRIX_RIGHT + //Define first data pin (right bottom corner is my first pin)

// NEO_MATRIX_ROWS + NEO_MATRIX_ZIGZAG, //Define the type of connection (in a zig zag connections and divided by rows not columns)

// NEO_RGB + NEO_KHZ800);

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(32, 8, PIN,

NEO_MATRIX_TOP + NEO_MATRIX_RIGHT +

NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE,

NEO_RGB + NEO_KHZ800);

int Red=255,Green=0,Blue=0;

String text="Easy Tech";

String RGB;

int pixelPerChar = 5,RGB_Completed=0;

int Delay, Brightness;

const uint16_t colors[] = {matrix.Color(Green,Red,Blue)};

// matrix.Color(255, 0, 0), matrix.Color(0, 255, 0), matrix.Color(0, 0, 255) };//matrix.Color(Red, Green, Blue),

void setup() {

Serial.begin(115200);

ESP_BT.begin("RGB LED DISPLAY");

EEPROM.begin(EEPROM_SIZE);

initdata();

// Serial.println("Start");

const uint16_t colors[] = {matrix.Color(Green,Red,Blue)};

matrix.begin();

matrix.setTextWrap(false);

matrix.setBrightness(Brightness);

matrix.setTextColor(colors[0]);

//matrix.setTextColor(matrix.Color(Green,Red,Blue));

}

int x = matrix.width();

int pass = 0;

void loop() {

while(ESP_BT.available()){

char ReadChar = (char)ESP_BT.read();

Serial.println(ReadChar);

// Right parentheses ) indicates complet of the string

if(ReadChar == ')' ||ReadChar == '}' || ReadChar == ']'){

if(ReadChar == ')' ){

RGB_Completed = 1;

}

if(ReadChar == '}'){

RGB_Completed = 2;

}

if(ReadChar == ']'){

RGB_Completed = 3;

}

else{

RGB += ReadChar;

}

if(RGB_Completed!=0){

if(RGB_Completed==1){

Light_RGB_LED();

RGB_Completed=0;

}

if (RGB_Completed==2){

text=RGB;

int _size = text.length();

int i;

for(i=0;i<_size;i++)

{

EEPROM.write(50+i,text.charAt(i));

Serial.println(text.charAt(i));

}

EEPROM.write(50+_size,'\0'); //Add termination null character for String Data

RGB_Completed=0;

RGB="";

}

if (RGB_Completed==3){

int val=RGB.toInt();

if(val>0 && val<=100){

if(val==0){

val=1;

}

Delay=(100-val)*2.5;

//scroll(Delay);

EEPROM.write(0,Delay);

}

else{

val=val-100;

matrix.setBrightness(val);

EEPROM.write(5,val);

}

RGB="";

RGB_Completed=0;

}

if(RGB_Completed==0){

//. Serial.println(RGB_Completed);

scroll();

}

void scroll(){

//Serial.println(text);

int maxDisplacement = text.length() * pixelPerChar + matrix.width();

matrix.fillScreen(0);

matrix.setCursor(x, 0);

matrix.print(text);

if(--x < -maxDisplacement) {

x = matrix.width();

if(++pass >= 1){ pass = 0;

// matrix.setTextColor(colors[pass]);

matrix.setTextColor(matrix.Color(Green,Red,Blue));

// matrix.setTextColor(matrix.Color(Red,Green,Blue));

}

matrix.show();

delay(Delay);

}

void Light_RGB_LED(){

int SP1 = RGB.indexOf('.');

int SP2 = RGB.indexOf('.', SP1+1);

int SP3 = RGB.indexOf('.', SP2+1);

String R = RGB.substring(0, SP1);

String G = RGB.substring(SP1+1, SP2);

String B = RGB.substring(SP2+1, SP3);

Red=R.toInt();Green=G.toInt();Blue=B.toInt();

// Serial.println(R);

matrix.setTextColor(matrix.Color(Green,Red,Blue));

EEPROM.write(10,Red);EEPROM.write(15,Green);EEPROM.write(20,Blue);

RGB="";

}

void initdata(){

int Speed=EEPROM.read(0);

if(Speed==NULL || Speed==0){

Delay=100;

}

else{

Delay=Speed;

}

int bright= EEPROM.read(5);

if(bright==NULL || bright==0){

Brightness=40;

}

else{

Brightness=bright;

}

int r= EEPROM.read(10);

if(r==NULL){

Red=0;

}

else{

Red=r;

}

int g= EEPROM.read(15);

if(g==NULL){

Green=255;

}

else{

Green=g;

}

int b= EEPROM.read(20);

if(b==NULL){

Blue=0;

}

else{

Blue=b;

}

char data[100]; //Max 100 Bytes

int len=0;

char k;

String Text= "";

k=EEPROM.read(50);

while(k != '\0' && len<500) //Read until null character

{

k=EEPROM.read(50+len);

data[len]=k;

Text+=k;

len++;

}

data[len]='\0';

if(Text==NULL){

text="EASY TECH";

}

else{

text=Text;

}

Serial.println(Speed);

Serial.println(Brightness);

Serial.println(Red);

Serial.println(Green);

Serial.println(Blue);

Serial.println(text);

}

How To Make Wireless RGB LED Matrix Text Display

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How To Make Wireless RGB LED Matrix Text Display

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