When trying to upload the Rx LED blinks 3 times ...
... but the Tx LED does not blink.
adafruit_support wrote:Double-check the board-type selection once more to be sure. If you have the UNO selected and it still does not work, contact email@example.com with a link to this thread.
I have a similar problem.
Tried shift + upload and got:
Users browsing this forum: No registered users and 4 guests