ESP32 Forum

I bought this board https://www.aliexpress.com/item/3280788 ... 4c4dGapEIG
(The yellow board, which has only one led onboard)
When uploading blink sketch, it doesnt work, but other sketch is ok
In this case, which pin is connected to the only led onboard ?
Thanks

You are going to have to get the schematic for the board to be sure. Many of these boards that only have one led is used for the power led.

Try using the LED pin number 2 instead of the default sample value.