RXTX comm

[PowerSystem]

Hello,

has someone managed to work with rxtx comm for accessing serial ports? (rxtx.org)

Any help appreciated.

Markus

[Andreas T.]

Did you get any further with this? I am interested in communicating with a scale that has only RS-232. I know that Troi Serial works but is too expensive now.

EDIT: I got a RS-232 to USB cable that works, so it really is a matter of getting FileMaker to see the new USB port and grab data from there.

Cheers,

Andreas

[PowerSystem]

Hi Andreas,

sorry i hadn't the time till now to go deeper into it.

It's still on my list ;-)

For me its the same reason like yours

Markus

[fseipel]

I had to interface a scale with MS Access yesterday. The main complication was they also wanted the lab scale connected to a titrator, so I used an A/B switch. With Win7, it took some time to find a free keyboard wedge that allowed the 7-E-1 data settings (I had to match Titrator, as it was not configureable on comm settings). If possible, can you simply use a keyboard wedge? If the scale is set up with a PRINT button to print the weight, this works nicely. If scale sends data constantly, with a delimiter, you should be able to read it using standard java libraries, see for example http://www.java-samples.com/showtutorial.php?tutorialid=11 -- rxtx may be better if solution needs to be cross-platform BUT you need to install DLL's and other components for it than just the JAR file. This example should allow you to read weights also: http://www.java-frameworks.com/java/ofbiz/ShipmentScaleApplet.java.html with ScriptMaster. Be sure to include the timeouts on opening port and reading. The biggest problem I've had is COM port numbers sometimes change when USB-->serial adapter moves, ideally Java code ought to loop through COM ports until scale is found.