Hi there, i am using an arduino uno board and an ethernet shield, when i plug the arduino uno board on the pc it works fine, but when i plug with wall plug 9V 2A i need to reset the arduino to make it work, i tryied everything, it is not a problem with powering and also it is not a problem with the code, i wonder if any of you could help me figuring out what it could be!!
The strange thing is: when i reset the board it work just fine, if i can't figure out why i would appreciate help to find a way to reset the board only once in the code or hardware...
Thanks you and appreciate your help, have a nice day
How do you figure out that the board does not work? Why could you eliminate the software as the reason for your problems? Does the same happen if you don't attach the Ethernet shield? Do you have an Arduino Ethernet Shield or a Chinese clone?
I found the problem, actually it was not the board that wasnt working, i could eliminate the software because it works fine plugged in the pc, if i don't attach the ethernet shield it works fine too, i tested 3 or 4 different arduino uno boards, and the Ethernet Shield apparently wanst original.
But, same way, i found a solution for my problem here: Solution
I will buy an Original Ethernet Shield, but temporarily the solution on this site works well. Thanks for the reply!
