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Thanks for Your posting. Very helpful to me. I am still looking for the second LED. LED on Pin 2 works fine, but I cannot find any more LEDs on the board.
Only the LED on the ESP board is blinking. Not sure where on the mother board the second may be. Or maybe I have a different board (LoLin new ModeMcu V3).2. Do you have any idea what the 'flash' button is for?
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