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Subject: Re: [Bluez-users] Accessing "/dev/rfcomm0" regarding
From: Marcel Holtmann <marcel@holtmann.org>
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Date: Wed, 20 Apr 2005 16:52:49 +0200

Hi Benjamin,

> We are testing for the bidirectional data transfer between 2 PCs over Bluetooth.
> 
> 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=1 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.

this is working. Check the attest program from bluez-utils.

Regards

Marcel




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