Arduino Mega using all I/O pins, but can't upload and use serial anymore.

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hey guys,

i use arduino mega, use pins, tx/rx pins digital i/o. have problem. while i/o pins connected, can not communicate via usb arduino.

if disconnect i/o, still can program it. problem is, arduino needs communicate via usb raspberry while i/o connected.
anybody has had same problem/ has solution?


thankyou
terick

hi,
quote
 even tx/rx pins digital i/o
what have connected tx/rx pins, pins 0 , 1, needed program mega.

https://arduino-info.wikispaces.com/megaquickref

tom..... :)



Arduino Forum > Using Arduino > Project Guidance > Arduino Mega using all I/O pins, but can't upload and use serial anymore.


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