Sun Comm Api 2.0 for Windows XP

Posted on 2007-11-28
Last Modified: 2013-11-24
I am developing software in Java within the Motorola MOTODEV Studio for Java(TM) ME v7.3 IDE.  I have found out that the communication API from Sun for serial communication within XP only works with the older jar file.  I have the three files:


and I placed them in the following directories according to this reference

comm.jar should be placed in:

win32com.dll should be placed in:
%windir%System32 should be placed in:

I  went into the environmental variables within windows XP and created a system variable called JAVA_HOME and gave it the path
C:\Program Files\Java\jdk1.6.0_02

When i go within my ide and try to run a class file which i created provided by jamod (Java Modbus
i get the following error.

Error loading SolarisSerial: java.lang.UnsatisfiedLinkError: no SolarisSerialParallel in java.library.path
Caught java.lang.UnsatisfiedLinkError: com.sun.comm.SolarisDriver.readRegistrySerial(Ljava/util/Vector;Ljava/lang/String;)I while loading driver com.sun.comm.SolarisDriver
      at SerialAITest.main(

In the project within the IDE i configured the build path and pointed to the comm.jar file in the JAVA_HOME directory.

Within the IDE when i go to the configuration details i see under the system properties category the listing:
*** System properties:
MOT_SDK_HOME=c:\Program Files\Motorola\MOTODEV Studio for Java(TM) ME v7.3\JMESDK

Does this mean that my java home location is not JAVA_HOME but rather MOT_SDK_HOME??
Can anyone help??????

I attached the file which uses the jamod.jar and the comm.jar files.  The program craps out at the 4th step where it trys to open a serial connection.  I am pretty certain that the issue is something with the Sun Comm API
import net.wimpi.modbus.ModbusCoupler;


import net.wimpi.modbus.msg.ReadInputRegistersRequest;

import net.wimpi.modbus.msg.ReadInputRegistersResponse;


import net.wimpi.modbus.util.SerialParameters;


public class SerialAITest {

  public static void main(String[] args) {

	//if (args.length < 4) {

	//	System.out.println("not enough args");

	//	System.exit(1);


    try {


     /* The important instances of the classes mentioned before */

     SerialConnection con = null; //the connection

     ModbusSerialTransaction trans = null; //the transaction

     ReadInputRegistersRequest req = null; //the request

     ReadInputRegistersResponse res = null; //the response

     /* Variables for storing the parameters */

     String portname= "COM1"; //the name of the serial port to be used

     int unitid = 1; //the unit identifier we will be talking to

     int ref = 1259; //the reference, where to start reading from

     int count = 1; //the count of IR's to read

     int repeat = 1; //a loop for repeating the transaction	 

     boolean isopen = false;



//   2. Set master identifier


     //ModbusCoupler.getReference().setMaster(master); I added this in


    // ModbusCoupler.getReference().setUnitID(1);	


//     3. Setup serial parameters

     SerialParameters params = new SerialParameters();









     System.setProperty("net.wimpi.modbus.debug", "true");

//   4. Open the connection

     con = new SerialConnection(params);

     System.out.println("Connection..." + con.toString());;



     isopen = con.isOpen();

     System.out.println("Serial port status..." + isopen);



//   5. Prepare a request

     req = new ReadInputRegistersRequest(ref, count);




//   6. Prepare a transaction

     trans = new ModbusSerialTransaction(con);



//	 7. Execute the transaction repeat times

     int k = 0;

     do {


       res = (ReadInputRegistersResponse) trans.getResponse();

       for (int n = 0; n < res.getWordCount(); n++) {

         System.out.println("Word " + n + "=" + res.getRegisterValue(n));



     } while (k < repeat);


//   8. Close the connection



    } catch (Exception ex) {






}//class SerialAITest

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Question by:teamcosmo02
  • 7
  • 6
LVL 92

Expert Comment

ID: 20370450
jamod appears to trying to load the solaris driver
LVL 92

Expert Comment

ID: 20370470
whats the properties file contain?

Author Comment

ID: 20370487
Here is the contents of the properties file:

# (Solaris)


# This properties file is necessary in order for javax.comm to run,

# and its contents are critical, and not to be tampered with without

# a very clear understanding of the impact.  It is shipped with a 

# default set of values that work on the target platform.


# 1. The directory javax.comm is launched from

# 2. Each directory in the classpath (including the one in which comm.jar is in)

# 3. <jvm dir>/lib

# 4. <jvm dir>/jre/lib


# The following properties must be defined:


#   driver

#   serpath0 ... serpath<n>

#   parpath0 ... parpath<n>



# Driver:


#   The driver property specifies the fully qualified class name of the

#   platform specific implementation of the javax.comm.CommDriver class.


#   Format:


#     driver=<fully qualified classname>


#   Example:


#     driver=com.sun.comm.SolarisDriver


# Port paths:


#   Port paths must be specified to indicate to the implementation

#   which are the core set of ports to make available. These can

#   be either paths to directories containing ports or paths to

#   specific serial or parallel ports.


# Implementation specific driver


# Paths to server-side serial port devices

serpath0 = /dev/term

serpath1 = /dev/cua

# Paths to server-side parallel port devices

parpath0 = /dev/ecpp0

parpath1 = /dev/printers

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LVL 92

Expert Comment

ID: 20370490
thats the solaris version, you should be using the windows one

Author Comment

ID: 20370755
can i edit the existing file or is there some place i can dowload the windows version?  i'm having trouble finding one
LVL 92

Accepted Solution

objects earned 500 total points
ID: 20370849
driver should be:


change the ports to whats on your box
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Author Closing Comment

ID: 31411568
Fantastic service!!

Author Comment

ID: 20371473
i am still having a problem.  I am now getting the error message
      at SerialAITest.main(

It is occurring at the same line where it uses the open method.  Any ideas?  I edited the file to the windows driver.
LVL 92

Expert Comment

ID: 20371497
did u update the ports?

Author Comment

ID: 20393393
what do you mean by updating the ports?
LVL 92

Expert Comment

ID: 20393407
the port config in the properties file

Author Comment

ID: 20393642
do you know what the serpath0 and serpath1 values should be for windows xp sp2 x86 ?
LVL 92

Expert Comment

ID: 20393722
don't sorry

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