[英]Unable to find serial ports
Using Rxtx API. 使用Rxtx API。
I am 100% sure there is a serial port available. 我100%肯定有可用的串行端口。 On Debian, I can see
/dev/ttyUSB3
exists when the device is connected. 在Debian上,连接设备后,我可以看到
/dev/ttyUSB3
存在。
Tried running getPortIdentifiers()
and got nothing when I tried iterating over the hashset 尝试运行
getPortIdentifiers()
并尝试遍历哈希集时一无所获
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("/dev/ttyUSB3");
Also did not work. 也没有用。 I got:
我有:
Exception Caused by: gnu.io.NoSuchPortException
引起的异常:gnu.io.NoSuchPortException
What am I doing wrong? 我究竟做错了什么? I am fairly sure rxtx was set up correctly.
我相当确定rxtx设置正确。
The problem here is with how RXTX defines ports. 问题在于RXTX如何定义端口。 By default, it will only look for certain serial ports(on Linux,
/dev/ttySX
). 默认情况下,它将仅查找某些串行端口(在Linux上为
/dev/ttySX
)。 There are several options you have to fix this: 您必须解决几个问题:
gnu.io.rxtx.SerialPorts
property when you start Java(either on the command line, or through code. See the Rxtx documentation for more details) gnu.io.rxtx.SerialPorts
属性(在命令行或通过代码。有关更多详细信息,请参见Rxtx文档 ) For #2, the following are libraries that I know of: 对于#2,以下是我所知道的库:
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