How to program arduino for ethernet with only usb cable I have arduino UNO r3 ATMEGA 328P board and this kind of a cable. But I want to make and test a program that need to get the data through ethernet port. Can I do only with them. I want to know whether they are enough to that (there are any converter or virtual devices) or should I buy anything.
You can do the programming of the Arduino through the USB cable, but in order to test and operate the program, you'll need an Ethernet shield and a cable to connect that to the LAN.