I just got an Arduino Mega. I installed the drivers and software. I can upload a sketch successfully (based on the software output). Nothing happens after I upload. It currently runs the blink program constantly and will not change even after upload. Anybody have any suggestions?
What are you uploading to it?
I am now just trying to re-load blink onto the board. I believe it came preloaded since the pin 13 light blinks constantly when I plug the board in.
I have worked with it a little more and have some more information. 2 known issues.
- When I upload it gets stuck on "Uploading to I/O board..."
- After I upload it can't see the com port again unless I restart the arduino environment.
I'd suggest you load something other than Blink, so you can see a real change.
Not that it matters, since it does not seem like you have ever actually loaded a different sketch onto the Mega.
Do you have the correct COM port selected? The correct board?
What OS are you using? What version of the IDE?
Loading other example programs provides the same results
I have tried both COM ports listed. Same results.
I am using the Arduino Mega board option
I am using Windows XP.
IDE version 0018.
One last thing. Here is a link to the board I bought if that makes a difference. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270564539451&ssPageName=STRK:MEWNX:IT
Does the list of COM ports change when you plug the board in? I have two COM ports listed without my Arduino connected, and three when it is connected. The correct port, then, is the third one (the one that gets added when the Arduino is plugged in).
Using this method, COM 4 is the one that is used for the mega. After attempted upload it disappears from the list as well.
I have also tried two different USB cables.
In the Arduino environment, Under Tools -> Board, Make sure that Arduino Mega is selected. Also, if you are running through a cheap USB hub, that may cause communication problems as well. Try plugging the cable directly into your computer. Outside of that, you may have an issue with your serial driver.
Success! I downloaded the Arduino environment again. After updating my COM port driver, IT WORKS! Thanks for all the help.