Problems with my Setup

Issues
1

Hello Community,
I’ve got a setup that is not working. The Setup:
A LoLin NOdeMCU-Board (with ESP8266 on board)
A Matrix with WS2812 (8x32 and 8x8 - both same problem)
A controllable power supply.

Board connected to PC and installed WLED 0.14. Success
Connected Board on D4 to Data on Matrix.
Connected Matrix to powersupply (5v to + and GND to -)
Set Powersupply to max 5V, A free to give what needed.

It starts with 1-2 LEDs to shine in full bright white. NOthing changes. I tried different ports on the Board and different GPIO. Sometimes there are multiple light flashing. But no wanted effect to set a color for all leds (and yes - I changed also the number of LEDs)

Can anyone help who solved the same problem?

2

1st make sure the ground on the LED PS is connected to the ground on the MCU.

Then check which ports you’ve configured for data out in WLED and make sure that’s what you’re connected to on the MCU pins.

3

So you say I need to connect DATA and GND from the LED to the board?

4

Found the solution. Sorry. I’m blond. Hehe.
I needed to put the board and the leds both on the same power-supply. And: Working. Ok. And besides that TX is my GPIO0… Found the layout-sheet after a few years again. But still thx.

Oh. BTW: Does anyone know why my 8x32 displays the scrolling text only on the 8 width? Horizontal/Vertical: no change. And if I turn the values around (so I have 32x8) it doesn’t work either…