Serial Port and Palm(MIDP)

I have found the KVM.prc, KVMutil.prc Then, I tried to code a programlike this:

import java.io.*;

import javax.microedition.io.*;

import com.sun.kjava.*;

class CommTest extends Spotlet

{

OutputConnection oc=null;

OutputStream dataOut=null;

String strURL="comm:0";

public static void main(String[] args)

{

(new CommTest()).register(NO_EVENT_OPTIONS);

}

public CommTest()

{

try

{

oc=(OutputConnection) Connector.open(strURL);

oc.close();

}

catch (Exception e)

{

System.err.println("Send data exception " + e);

}

}

}

I tried to run this program, however, I got this: Send data exception javax.microedtion.io.ConnectionNotFoundException: The required protocol does not exist comm:0

How can I solve this problem?

watashiha at 2007-7-2 1:38:08 >

tchon,

I've read in your message that you got a code working ok with palm ports.

I have a problem, and I woluld like to get your opinion, becouse I can't make it work.

I have developed a code to open serial port in palm, becouse I need to print from palm.

I can't open any port.

What i get is a code like this:

String ports = System.getProperty("microedition.commports");

This line, when running in a topdesk with j2me toolkit, shows me:

ports 0,1

That means I have com1 and com2 recognized.

In the palm, I get

ports

That means, there is no comm port available in the palm.

I tryed your code

sc = (StreamConnection)Connector.open("comm:0;baudrate=9600;bitsperchar=8;stopbits=1;parity=none",Connector.READ);

I can't open the port.

I tryed with palm 100 and palm 130.

I need to use serial cable to send characters to a printer.

I saw a program printing invoices with palm 100. I don't have the source code. I would like to do it using java.

Any way, a code in c would be nice, becouse I need to solve this problem. My preference is java.

Is there any configuration that has to be made in the palm? I mean Connection or Network preferences.

Thanks for your kindness.

Regards,

Luis Inserra

Luis_Inserra at 2007-7-2 1:38:08 >