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Panel Matrix led

Hay varias bibliotecas (que no librerías)

Ejemplo 1

https://microcontrollerslab.com/led-dot-matrix-display-esp32-max7219/

Bibliotecas: MD_MAX72XX by MajicDesigns and MD_Parola de MajicDesigns

PANEL	ESP32
VCC	Vin
GND	GND
DIN	GPIO23
CS	GPIO5
CLK	GPIO18

Texti de plano a pins

#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

// Uncomment according to your hardware type
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
//#define HARDWARE_TYPE MD_MAX72XX::GENERIC_HW

// Defining size, and output pins
#define MAX_DEVICES 4
#define DATA_PIN 23
#define CS_PIN 5
#define CLK_PIN 18


MD_Parola Display = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

void setup() {
 
  Display.begin();
  Display.setIntensity(0);
  Display.displayClear();
}

void loop() {
  Display.setTextAlignment(PA_LEFT);
  Display.print("ESP32");
  delay(2000);
  
  Display.setTextAlignment(PA_CENTER);
  Display.print("ESP32");
  delay(2000);

  Display.setTextAlignment(PA_RIGHT);
  Display.print("ESP32");
  delay(2000);

  Display.setTextAlignment(PA_CENTER);
  Display.setInvert(true);
  Display.print("ESP32");
  delay(2000);

  Display.setInvert(false);
  delay(2000);
}