I'm currently using an Ethernet Shield as an Internet access watchdog. Like many of you, I encounter a very annoying problem with this shield. In order to make it work well, I have to reset it after connecting arduino to a power source.
Is there a way to connect an output pin of arduino to reset pin of Ethernet shield to reset it without resetting entire Arduino board?
If you have an Adafruit shield, it's easy: it actually requires a jumper, so you can just wire it to a different pin on the Arduino. And ladyada includes pads for all the signals.
I don't know about the other brands of Ethernet shields from first-hand experience, but, in the worst case, you can cut the trace from the Wiznet's reset pin, and solder a wire leading to the digital pin you want to use for reset.
As reset button present on shield resets both shield and board, I was thinking about cutting pin that come from ethernet shield in order to be sure that only this shield is reset.
Is applying a high level to reset pin will do the job?