Trouble using WS2812 on HTCC-AB02A

Hello there !
I’m using one WS2812 connected to GPIO7 in a AB02A… I1m tryibg the WS2812.ino example, but the led or just flash green or flash random color… can some one help me?

Im using this code:

#include “CubeCell_NeoPixel.h”
CubeCell_NeoPixel pixels(1, GPIO4, NEO_GRB + NEO_KHZ800);

void setup() {
  pinMode(Vext, OUTPUT);
  digitalWrite(Vext, LOW);  //SET POWER
  pixels.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  pixels.clear();           // Set all pixel colors to 'off'
}
uint8_t r = 60;
void loop() {
  pixels.setPixelColor(0, pixels.Color(r, 0, 0));
  pixels.show();  // Send the updated pixel colors to the hardware.
  delay(500);  // Pause before next pass through loop
  pixels.setPixelColor(0, pixels.Color(0, 0, 0));
  pixels.show();  // Send the updated pixel colors to the hardware.
  delay(500);  // Pause before next pass through loop
}

I’ve posted this video to share my problem:https://youtube.com/shorts/wagN45neKYw?si=e1ZiAKVqCqrgBX64

https://github.com/HelTecAutomation/CubeCell-Arduino/tree/master/libraries/RGB/examples/WS2812

Perhaps this will be helpful to you

I have the same Problem using WS2812 arrays with cubecell AB01-V2. The first LED 0 lits randomly green with full brightness. All other LED’s behind are working correctly.