Provided by: bluez_5.48-0ubuntu3.9_amd64 
NAME
rfcomm - RFCOMM configuration utility
SYNOPSIS
rfcomm [ options ] < command > < dev >
DESCRIPTION
rfcomm is used to set up, maintain, and inspect the RFCOMM configuration of the Bluetooth subsystem in
the Linux kernel. If no command is given, or if the option -a is used, rfcomm prints information about
the configured RFCOMM devices.
OPTIONS
-h Gives a list of possible commands.
-a Prints information about all configured RFCOMM devices.
-r Switch TTY into raw mode (doesn't work with "bind").
-i <hciX> | <bdaddr>
The command is applied to device hciX, which must be the name or the address of an installed
Bluetooth device. If not specified, the command will be use the first available Bluetooth device.
-A Enable authentification
-E Enable encryption
-S Secure connection
-M Become the master of a piconet
-L <seconds>
Set linger timeout
COMMANDS
show <dev>
Display the information about the specified device.
connect <dev> [bdaddr] [channel]
Connect the RFCOMM device to the remote Bluetooth device on the specified channel. If no channel
is specified, it will use the channel number 1. This command can be terminated with the key
sequence CTRL-C.
listen <dev> [channel] [cmd]
Listen on a specified RFCOMM channel for incoming connections. If no channel is specified, it
will use the channel number 1, but a channel must be specified before cmd. If cmd is given, it
will be executed as soon as a client connects. When the child process terminates or the client
disconnect, the command will terminate. Occurrences of {} in cmd will be replaced by the name of
the device used by the connection. This command can be terminated with the key sequence CTRL-C.
watch <dev> [channel] [cmd]
Watch is identical to listen except that when the child process terminates or the client
disconnect, the command will restart listening with the same parameters.
bind <dev> [bdaddr] [channel]
This binds the RFCOMM device to a remote Bluetooth device. The command does not establish a
connection to the remote device, it only creates the binding. The connection will be established
right after an application tries to open the RFCOMM device. If no channel number is specified, it
uses the channel number 1.
release <dev>
This command releases a defined RFCOMM binding.
If all is specified for the RFCOMM device, then all bindings will be removed.
AUTHOR
Written by Marcel Holtmann <marcel@holtmann.org>. APRIL 28, 2002 RFCOMM(1)