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From: Benny <bennyvasanth@gmail.com>
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Subject: [Bluez-users] Accessing "/dev/rfcomm0" regarding
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Date: Wed, 20 Apr 2005 18:34:51 +0530

Dear all,

We are testing for the bidirectional data transfer between 2 PCs over Bluet=
ooth.

The setup is as follows:
    i) Host PC(Fedora 3-Linux kernel 2.6.9) with USB Bluetooth
dongle(CSR Chipset). We have used the Bluez utilities(rfcomm
application) to connect the device and send data through the device
handle "/dev/rfcomm0".
    ii) Device PC(Linux/Windows) hyperterminal(COM1/"/dev/ttyS0"). The
BT-SPP  module is connected to the Device PC.

We using the commands in the following sequence on the Host PC:
i) hcid
ii) sdpd
iii) sdptool add --channel=3D1 SP
iv) rfcomm connect 0 <BDADDR> 1
v) ls -l > /dev/rfcomm0 - for sending the data, working fine
vi) cat /dev/rfcomm0 - for reading the data, working fine.

We have written a simple program which opens "/dev/rfcomm0" using
"open("/dev/rfcomm0",O_RDWR)". We are able to send data using the
system call "write()". But we are not able recieve data using the
system call "read()". But the "hcidump -x" utility is showing the
recieved data.

Please advice.

Thanks & Regards,
Benjamin


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