[Rxtx] serial ports on the lan

[M.Dec-Gazeta]

----- Original Message ----- 
From: "Dr. Douglas Lyon" <lyon at docjava.com>
To: <rxtx at qbang.org>; <lyon at docjava.com>
Sent: Thursday, December 31, 2009 1:24 PM
Subject: [Rxtx] serial ports on the lan


> Hi All,
>
> More-over, with a network in the substrate, I can run my programs without
> having to load JNI binaries on every machine. This enables

I think that this is serious mistake in your analysis if we are talking 
about Java environment.
Java beeing independent of OS platform works on the basis of the lot of  JNI 
interfaces prepared for each platform separatelly.
JNI is the interface between OS/hardware and Java (JVM).
A lot of  Java users don't think about it (or doesn't know also), but this 
is the fact.

No JNI interface in software interacting with hardware, means that this 
software isn't pure Java software - Java software needs JVM, JVM needs JNI 
to "talk" with OS.
But in any case network interface (soft/hard) which interacts with serial 
(RS-232) needs special part of the binaries (software logic between Network 
and Serial) and doesn't matter this is "JNI" or somewhat.
Remember that RS232 (serial)  is in fact phisical layer with simple hardware 
handshake (CTS/RTS etc.) and has nothing to TCP/IP, UDP, QOS etc which are 
logical layers of the connection.
Of course in theory you may prepare TCP/IP over RS232 hardware layer but it 
hasn't any sense.

> deployment with far greater ease. Now, with an IP address and a port
> number

You have described protocol "RS232_Over_IP" similar in ideas to 
"Voice_Over_IP".
Such ideas needs a lot of special binaries - drivers controlling serial 
interfaces in the core of the LAN interfaces software.

It has nothing to RXTX core - RXTX is a part of JVM with JNI for serials 
interfaces for different platforms.

You may prepare overlay to TCP/IP based on RXTX, finally creating 
RS232_Over_IP (RoIP) or better - UART_over_IP - UoIP.  :).
But JNI stiil HAVE TO exists everywhere.

Regards
and
Happy New 2010 Year for everybody

Mariusz Dec