NEED HELP RBG MATRIX LED DISPLAY P10 32x64

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hi friends..i have 1 project wireless display board.
i use arduino mega and Adafruit RBG matrix led dispaly 32x64.
i follow wiring and example coding from Adafruit all work fine.

now i need modified this coding to make it wireless (i plan use Blnyk app and wifi). now i try modified this coding follow arduino example SerialDisplay, so i can sent any TEXT from serial monitor.
to many time try but not work :stuck_out_tongue_closed_eyes: ..

can anyone help check my coding?

here my coding:

// Similar to F(), but for PROGMEM string pointers rather than literals
#define F2(progmem_ptr) (const __FlashStringHelper *)progmem_ptr


#define OE   9
#define LAT 10
#define CLK 11
#define A   A0
#define B   A1
#define C   A2
#define D   A3
// Last parameter = 'true' enables double-buffering, for flicker-free,
// buttery smooth animation.  Note that NOTHING WILL SHOW ON THE DISPLAY
// until the first call to swapBuffers().  This is normal.

RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, true, 64); //32X64

void setup() {
  matrix.begin();
  matrix.setTextWrap(false); // Allow text to run off right edge , false=LEFT TO RIGHT 1 LINE , TRUE=BOTTOM TO UP AND RUN TO RIGHT
  matrix.setTextSize(3); // SIZE OF TEXT =1 SMALL , 2/3/4/5 BIG
  Serial.begin(9600);
}

void loop() {
 // byte i;
const char str[] PROGMEM = "HELLO";
const char str1[] PROGMEM = "";
int    textX   = matrix.width(),
       textMin = sizeof(str) * -12, // CONTROL NO OF TEXT -12 = UNLIMITED
       hue     = 0;
  
 
   
if (Serial.available()) {
    // wait a bit for the entire message to arrive
    delay(1000);
      
    // read all the available characters
    while (Serial.available() > 0) {
      matrix.fillScreen(0);  // Clear background
      // display each character to the LCD
      // Draw big scrolly text on top
      
   matrix.setTextColor(matrix.ColorHSV(hue, 255, 255, true)); // MULTICOLOR
  //matrix.setTextColor(matrix.Color333(7,7,7)); //SINGLE COLOR
  matrix.setCursor(textX, 1);
  matrix.write(Serial.read()); // TEXT LINE 1
  
  // Move text left (w/wrap), increase hue
  if((--textX) < textMin) textX = matrix.width();       //textMin
  hue += 7;                                           // CONTROL COLOR CHANGE SPEED
  if(hue >= 1536) hue -= 1536;                         //CONTROL COLOR CHANGE SPEED 

  // Update display
  matrix.swapBuffers(false);
    }
  }

}
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