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I've got an Arduino Uno and I'm relatively new to electronics / I'd like to connect it to a serial receipt printer and an ethernet switch. For all the research that I've done, I've found a number of serial and ethernet shields, but I'm not sure if I can use them both together.

Any help would be greatly appreciated.

asked May 21, 2011 at 23:46
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I believe the USART on the 328P is connected to the AT8U2 Micro, which is doing the USB to Serial conversion. You my be able to use these same pins for another serial device, as long as you aren't connected to USB. If this is the case, then you should have no conflicts from the Ethernet shield.

If you need to roll your own serial using other pins, just look at the ethernet shield first to determine what pins it is using.

answered May 22, 2011 at 0:46
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