Hello, I am sending some data over serial from Processing to ARDUINO. When I try to open the serial Monitor of Arduino to read the data I get the message that my port is already being used...and this makes sense. I am using in both processing and ARDUINO COM4 when I have one platform on the other …

Problem with Port in ARDUINO/Processing

system January 13, 2010, 9:24pm 4

You mean just send the data back to processing from ARDUINO to confirm that they are clear?

Exactly.