Here is my code:
import java.io.*;
import java.util.*;
import javax.comm.*;
public class SMS {
public static void main(String[] args) {
Enumeration lists=CommPortIdentifier.getPortIdentifiers();
System.out.println(CommPortIdentifier.PORT_SERIAL);
System.out.println(lists.hasMoreElements());
while (lists.hasMoreElements()){
CommPortIdentifier cn=(CommPortIdentifier)lists.nextElement();
if ((CommPortIdentifier.PORT_SERIAL==cn.getPortType())){
System.out.println("Name is serail port "+cn.getName()+" Owned status "+cn.isCurrentlyOwned());
try{
SerialPort port1=(SerialPort)cn.open("ComControl",800000);
port1.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
System.out.println("Before get stream");
OutputStream out=port1.getOutputStream();
InputStream input=port1.getInputStream();
System.out.println("Before write");
out.write("AT".getBytes());
System.out.println("After write");
int sample=0;
//while((( sample=input.read())!=-1)){
System.out.println("Before read");
//System.out.println(input.read() + "Testing ");
//}
System.out.println("After read");
System.out.println("Receive timeout is "+port1.getReceiveTimeout());
}catch(Exception e){
System.err.println(e.getMessage());
}
}
else{
System.out.println("Name is parallel port "+cn.getName()+" Owned status "+cn.isCurrentlyOwned()+cn.getPortType()+" ");
}
}
}
}
This is the output:
1 true Name is serail port COM1 Owned status false Before get stream Before write After write Before read After read Receive timeout is -1 Name is serail port COM2 Owned status false Before get stream Before write After write Before read After read Receive timeout is -1 Name is serail port COM3 Owned status false Before get stream Before write After write Before read After read Receive timeout is -1 Name is serail port COM4 Owned status false Before get stream Before write After write Before read After read Receive timeout is -1 Name is parallel port LPT1 Owned status false2 Name is parallel port LPT2 Owned status false2
My COM4 port is being used by my phone modem, but according the code its status is free. Is there anything I've missed in the code and how can I sort these out?
