USB-to-Serial Flash

This tool ist to flash https://github.com/dokuhn/ESP8266-WLED?tab=readme-ov-file

You need the pins, I used https://www.amazon.de/gp/product/B07FP7XJVQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
FT232 USB-to-Serial, like https://www.az-delivery.de/products/ftdi-adapter-ft232rl?_pos=1&_psq=usb+serial&_ss=e&_v=1.0
Flash WLED with https://install.wled.me/