问题
I'm using RXXTX java lib to connect to serial ports. I'm using this lib with no problems connecting to /dev/ttyUSB0 (1,2,3,etc).
But when I want to connect to /dev/ttyACM0 the port its not found.
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("/dev/ttyACM0");
the Exception is thrown:
gnu.io.NoSuchPortException at gnu.io.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:218)
I already listed all the ports but no success.
回答1:
Processing and USB ports /dev/ttyACM0, /dev/ttyACM1, .... http://pblog.ebaker.me.uk/2011/09/processing-usb-ports-devttyacm0.html
Processing doesn't like reading Linux USB devices like /dev/ttyACM0 or /dev/ttyACM1.
The solution is easy, just symlink the devices like this...
ln -s /dev/ttyACM[x] /dev/ttyS8[x]
You can put any number after the ttyS, although it is possible that ttyS0 and other low numbers are defined, numbers in the eighties are (almost) guaranteed to work.
回答2:
This might help you: https://groups.google.com/forum/#!topic/openhab/f-gVkwJg-hg
update your startup script to include "->Dgnu.io.rxtx.SerialPorts=/dev/ttyACM0" in the Java command line
来源：https://stackoverflow.com/questions/9717477/java-rxtxcomm-lib-to-connect-to-dev-ttyacm0