How to fetch MySQL data to display on led screen 8x32

Dear all,

Hope you’re going well.

I’m stuck in a new project. :slight_smile: I’m trying to display a message (or a word) stored in a MySQL database on an 8x32 Led screen. I own an Arduino Uno with Genuino Yun Shield and a Led 8*32 Digital RGB LED Matrix (WS2812B).

Is it possible to fetch MySQL data and post it in matrix.print(F(“MyMessage”)); ?

I used the following code with adafruit library :

// Adafruit_NeoMatrix example for single NeoPixel Shield.
// Scrolls ‘Howdy’ across the matrix in a portrait (vertical) orientation.

#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#ifndef PSTR
#define PSTR // Make Arduino Due happy

#define PIN 6

// 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:
// 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_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, 8, PIN,

const uint16_t colors = { //RGB
matrix.Color(255, 0, 0), matrix.Color(0, 255, 0), matrix.Color(0, 0, 255) };

void setup() {

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

void loop() {
matrix.setCursor(x, 0);
if(–x < -100) {;
x = matrix.width();
if(++pass >= 3) pass = 0;

Thank you so much in advance for your help.


Matth, looks like an interesting project. But if you want help from the forum, you should be courteous and read the forum guidelines before you post. Please don't make the excuse that you are new to the forum, because the guidelines are at the top of every forum section and are titled "How to use this forum - please read.". They will give you good advice including how to post your code correctly and what else you should post, like links to unusual components. You can modify your post above and fix it. This may seem like an annoyance, but it really tells the forum members that you would genuinely appreciate their help.