Neomatrix no longer works

Using Arduino Programming Questions
1

Hello,

Yesterday the IDE showed me an update of the board, which I did (->ESP32).

Then I uploaded the code for the ESP32 and nothing worked anymore. My LED matrix (32x8) no longer displayed anything.... All LEDs dead.

At first I thought something had broken, so I first replaced the ESP32 -> nothing
Then replaced the LED matrix -> nothing

Then tested the sample codes, with matixtest.ino at least some light.
The first 5 pixels show H-O-W-D-Y

So changed the sample code to 32 pixels -> Nothing, no LED lights up

So, tested step by step, up to 9x8 it works, from 10x8 no LED lights up...

This one still works:

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(9, 8, PIN,
  NEO_MATRIX_TOP     + NEO_MATRIX_RIGHT +
  NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE,
  NEO_GRB            + NEO_KHZ800);

this not:

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(10, 8, PIN,
  NEO_MATRIX_TOP     + NEO_MATRIX_RIGHT +
  NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE,
  NEO_GRB            + NEO_KHZ800);

I've since thrown everything for the Arduino down and reinstalled it, but it remains.....

2

Roll back the ESP32 board files to the previous version

3

If the problem arose from the core update, reinstall the previous version and don't worry. Maybe there's a bug in the new version

4

Installing a different IDE or board version did not help.

5

How do five neopixels display five letters? A pixel is a dot. You lost me.

If changing the board and changing the matrix do not change the result, look at wiring and power. ESP32 are known for running hobby Neopixels, so I would guess that ability is tested before releasing a new core.

9x8 no LED lights up... This one still works (9x8... You lost me again.

6

i found the error. it seems there is a bug in eps32 libary

image

i ve no problems with versions until 2.17.
all version of 3.x dont work correctly

1 Like
7

They was advised you the same in posts #3 #4