I just ordered an Arduino Mega 2560, and so far, I've managed to upload programs to it successfully. However, whenever I tried using any of the extra digital pins that it comes with, they wouldn't work. I just tried using them again—specifically, here is the code I wrote before the void setup() part…

I keep getting this odd message whenever I try to upload to my Arduino Mega 2560

Grumpy_Mike May 2, 2012, 9:01pm 8

The LEDs had resistors on them? What value?

Topic		Replies	Views
Can't upload to Arduino Mega 256 IDE 1.x	5	1403	May 5, 2021
unable to upload any programs to the arduino IDE 1.x	4	1217	May 5, 2021
Arduino Mega 2560 upload impossible, timeout error Microcontrollers	19	14125	May 6, 2021
Newbie with Mega upload problems IDE 1.x	11	3340	May 5, 2021
Can't upload program to Arduino Mega2560 - L led blinking constantly - IDE 1.x	5	1630	May 5, 2021