Java RXTXcomm lib to connect to /dev/ttyACM0

java serial-port communication rxtx
while true picture while true · Mar 15, 2012 · Viewed 11k times · Source

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.

Answer

MountainX picture MountainX · Mar 11, 2016

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.

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