What is causing the internal blue LED to flash at a very high frequency.

[YvedD]

Hi all,

i love those Lolin D32 boards, but for now i have a problem. when i upload my project, it runs very fine, but from time to time the board become weird in its behavior. I don't get serial messages back from the board, when i look to the board, the internal blue led in flickering at high speed. So i checked the .ino file, and then the libray's, seems all fine (Arduino gives no errors when compiling and uploading) The only solution is to upload a empty sketch, and then all works well again, up to the next LED flashing problem.

Is there any documentation on this LED flashing behavior? i totaly have no clue where to start or search on this error (googled, youtubed, nothing found)

Thanks so much in advance

Grtz, Yves