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Applet Access to USB for Serial I/O

Bill Denniston

Joined: Feb 18, 2006
Posts: 5
I would like an applet to communicate via USB to a simple serial device (not mass storage or HID), sort of like we used to do with good old fashioned RS232C. (Sorry; I'm dating myself...) Are there any applet restrictions? Any USB driver issues, like getting around or through them? Any good examples available? Any suggestions or advice appreciated. Thanks.
Ulf Dittmer

Joined: Mar 22, 2005
Posts: 42965
An applet can't normally access local I/O devices. The way to do it is to sign it, or change the local security policy. See HowCanAnAppletReadFilesOnTheLocalFileSystem for details.

The points to a couple of articles about using USB from Java, and a library that actually does it.
I agree. Here's the link:
subject: Applet Access to USB for Serial I/O
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