[aae2kmitl]

i write program bluetooth use serial port connection (inputstream outputstream). i test with 6600 and 6230 it's work. but i test with 7610 it's not work.

server client
1. waiting for client
2. client connect to server
3. server accept and
open Data In/out stream
4. waiting data ( in.readUTF() )
5. open Data In/out stream
6. client writeUTF data1
7. waiting data ( in.readUTF() )
8. server receive data1
9. server writeUTF data2
10. waiting data (in.readUTF() )
11. client receive data2
12. client writeUTF data3
13. waiting data ( in.readUTF() )
14. server receive data3
15. server writeUTF data4
16. waiting data (in.readUTF() )
17. IOException - detail is
EOFException


client will receive data one time only. i don't understand.
after writeUTF i use out.flush(); but it still not work.

who khow this problem help me, please. Thank you very much

[seppo_fn]

What is the use case? Are you having a connection between two phones or between a phone and a PC?

Seppo
Forum Nokia

[mini-hopp]

Hello!

I have a similar problem.

I'm using a 7610 to connect to my PC (using Hyperterminal on the PC side). I'm able to make inquiries and connect to the serial port service but I get some strange errors during the communication.

The application work like this:
When I discover the service I get the connection URL
String serialPortUrl= servRecord[0].getConnectionURL(ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false);

Then I start a new thread to handle the reading process.
--
int bytesRead = 0;
StreamConnection conn = (StreamConnection)Connector.open(serialPortUrl);

in = conn.openInputStream();
byte[] tmpBuffer = new byte[1024];

while((bytesRead=in.read(tmpBuffer))>=0) {

// process input in buffer

}

MyMidlet.getDisplay().setCurrent(new Alert("Error", "Done. bytesRead="+bytesRead, null, AlertType.ERROR), this);
--
1. When I type characters one by one in hyperterminal the application (in the 7610) works just fine.

2. If I write some data in notepad, copy it to the clipboard and then paste it into hyperterminal I get one of these problems:
Problem 1. Some of the data is processed and then suddenly read() returns EndOfFile and the Alert box appears.
Problem 2. The JVM crashes and I get error codes like these: jes-228-java-comms@143ee9, jes-254-java-comms@143ee9, jes-f8-java-comms@143ee
If I type characters very fast in hyperterminal (instead of paste) I also get this kind of behaivor.

Does anyone have an idea of what is wrong?

[mijutu]

I've also noticed a bluetooth EOFException problem.

I made a simple C-program on the PC side and a midlet on the phone side.
6600 and 6630 work fine, but 7710, 9500 and 9300 all have the same problem:

InputStream.read() will throw EOFException when it should block.

On the pc, I use
socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
localaddr.rc_family=AF_BLUETOOTH;
localaddr.rc_bdaddr=*BDADDR_ANY;
localaddr.rc_channel=(uint8_t)10;
bind, listen, accept...

On the phone:
connection=Connector.open("btspp://"+macAddr+":10");
inputStream=((InputConnection)connection).openInputStream();
inputStream.read();

[traud]

Found this very old thread in the archives, however, perhaps someone finds it with via a search or users have subscribed to it. As the issue presented in this thread sound similar to one of mine, please have a look at my workaround…