问题
i am trying to connect serial port on ubuntu. However, It doesn't work for me. I succesfully run the same project on Windows just with different drivers. The problem is that I can't load any ports while I am using this:
CommPortIdentifier.getPortIdentifiers(); // i am using rxtx 2.1.7
It always return zero ports. I would like to use port ttyS0 whichworks great with minicon so i am sure that port is not blocked and the machine is not broken.
Anyone has a reason for this ?
回答1:
It was just becouse low priviligies. I had to add myself to a group which is supposed to work with ttyS0.
回答2:
if nothing helps, you should consider to add this line to your java code:
System.setProperty("gnu.io.rxtx.SerialPorts", "/dev/yourtty");
did it for me. (Only if you work with the RXTX library)
回答3:
I used this command
sudo chmod 666 /dev/ttyUSB0
I had the same problem and it worked the moment after I used this command. Like Smolda said, it is a permission problem.
来源：https://stackoverflow.com/questions/11790811/commportidentifier-getportidentifiers-with-zero-ports-on-linux