serial port - Arduino output pins go HIGH on start? -


i have aceduino board similar arduino. tried making sample led , button using demo. had notice when plug usb, led flashing couple of times.

just wanna ask if normal when using usb power arduino.

is there way can avoid it?

thank in advance.

the onboard led (pin 13) flashes couple of times to indicate arduino executing bootloader. happen every time power or reset board.

you can avoid modifying bootloader inside arduino board. require avr in-system programmer (a piece of hardware program microcontrollers) burn bootloader. can use arduino board special sketch avr in-system programmer.

this link explains how implement both approaches burn arduino uno's bootloader (which uses same microcontroller of clone).

my advice: avoid if can.


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