Hi everyone.
I’ve tried almost everything, and the only thing that has worked for me is declaring the board in this way:
esp8266:
- board: d1_mini
early_pin_init: false
It’s the only way I’ve found to avoid the “blinking” during boot-ups.
Even with capacitors, it still happened.
I’ve tried on both old and new D1 Mini boards (Chinese clones), and it has worked in both cases.