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Originally Posted by sand500
are there any built in ways to communicate to a java program running on a computer via ethernet and ip? java has sockets but can arduino support that? Also, can I2C be used to communicate a arduino to crio
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No, you also need the Ethernet Arduino if you plan to use RobotOpen with ethernet. The Arduino will then support networked connections.
Yes, I2C can be used with a an Arduino. The cRIO has no direct I2C output, but there are I2C ports on the DSC.