LINBPQ is a Linux version of the BPQ32 Node, BBS and Chat Server components. Other BPQ32 applications may be added later. Although all testing was done on Linux systems (Raspberry PI running Raspbian and a PC running Ubuntu) it should work on other Unix systems.
LINBPQ normally runs as a console
can be run
as a daemon. I usually have it set to run in a virtual console, started
Management is via a Web Browser.
The current version includes drivers for KISS, AXIP, BPQEther, Kantronics Pactor Modems, Telnet, SCS Tracker, SCS PTC, AGWPE, UZ7HO Soundmodem, WINMOR and an I2C Driver for PITNC on the PI. Others to follow. As AGWPE, UZ7HO and WINMOR only run on Windows, these must be run on a separate PC. The Linux Soundmodem can be used by configuring it to present a virtual KISS interface.
Note - The Tracker seems
to crash the PI - it works fine on PC linuc systems. This is under
The i386 Ubuntu version can be downloaded from
and the pi version from
The source will be available soon for those who want to try it on another platform.
I suggest you create a directory linbpq to hold the software and files. The simplest way to download is to use wget. You will need to make it executable.
chmod +x linbpq
If you want to use UDP or TCP ports below 1024, or the BPQEther
Driver, you must also set some capabilites on the file (or run as root,
wihch is not advisable). You may need to install setcap if it isn't
already on your system - sudo apt-get install libcap2-bin (or
the equivalent for your disatribution.
sudo setcap "CAP_NET_RAW=ep CAP_NET_BIND_SERVICE=ep" linbpq
You also need some web pages for the management interface. Create
directory HTML (capitals) under your linbpq directory, and download and
The Node configuration is read from file
format of which is the same as for the Windows version. (note like all
Unix names it is case sensitive – BPQ32.cfg won’t work).
You also need some web pages for the management interface. Create directory HTML (capitals) under your linbpq directory, and download and unzip https://dl.dropbox.com/u/31910649/HTMLPages.zip into it.
As serial port names are pretty variable in Linux, the code accesses them via symlinks in the linbpq directory to ports called com1 – com255. So, for example, to access a TNC connected to the serial port on the PI, enter
ln –s /dev/ttyAMA0 com1 (lower case!)
and specify IOADDR (or COMPORT) 1 in the bpq32.cfg.
As management is web based, you must have a Telnet port with an HTTPPORT line and a user record for yourself. Set the SYSOP flag on the user record – something like:
You may also need TCPPORT and FBBPORT lines for access using telnet or bpqtermtcp
The BBS config is stored in linmail.cfg. . This will be created when software first runs if it doesn’t already exist. If you want to copy the bbs configuration from an existing bpqmailchat installation, there is a version of mailchat available from https://dl.dropbox.com/u/31910649/BPQMailChat.exe that will save your configuration to linmail.cfg in the MailChat folder when it closes.
The Chat Server config is stored in chatconfig.cfg. This will be created the first time the software runs, and can be updated using the web management interface.
If run without a parameter, ie ./linbpq only the node will run. If you add mail as a parameter, ie ./linbpq mail the BBS will be started. If you add chat, the Chat Node will be started. See below for details of how to run LinBPQ automatically when Linux loads.
You can also add the lines
to bpq32.cfg to enable the Mail or Chat servers
The management is via a Web
browser, I’ve tested
and Firefox, but others may work. Just point the browser to
the rest should be obvious. If you
access locally as 127.0.0.1 (not localhost)
need a password to access the mail pages. If not you will have to sign
the user and password from the telnet port configuration.
Problems are likely in the early stages. Set your system up to create core files when a program fails if this isn’t enabled by default. On my systems this needs the command
ulimit -c unlimited
I added it to file .bashrc
The following instructions were originally written for the Raspberry
PI, with the LinBPQ software running as user pi. The user name can be
changed to suit your installation. It is possible to run as root, but
this is not advisable
You can have LinBPQ start automatially when the OS is loaded, and restart if it fails. I suggest running it in a Linux Virtual Console - the examples use tty2, but you can change to suit you requirements The mechanism uses the init process, but the details depend on the disribution.
Create a script to run linbpq
sudo -u pi mv linbpq.new linbpq
sudo -u pi ./linbpq
Set runbpq ax executable:
chmod a+x /home/pi/linbpq/runbpq
Add the following lines to /etc/inittab
##Start LinBPQ on bootup and respawn it should it crash
Remove (or comment out) the line
2:23:respawn:/sbin/getty 38400 tty2
Create a file bpq.conf in directory /etc/init
start on runlevel 
stop on runlevel [!2345]
exec "/home/pi/linbpq/runbpq" >/dev/tty2
In directory /etc/init rename tty2.conf to tty2.save
For those unfamilair with Linux Virtual Consoles, the linux system has several console windows (usually 7) that you can switch between using the key combination alt/fn1 to alt/fn7. If you are running the X gui this nomally runs in 7, and you can switch to the others using ctrl/alt/fn1 etc. If you are accessing remotely, for example using ssh, there is a program conspy that allows to to interact with the virtual consoles.You''ll probably need to install it - eg sudo apt-get install conspy.
Install Spider following instructions in Pi Yahoo group
The following sets up the linux kernel ax.25 and NETROM code to
a link from LinBPQ to spider.
There are other ways of doing this, but this way only needs one callsign/alias,
and gives access to both local RF and network users.
Install socat, ax25-apps, ax25-tool
I've found that some systems run rc.local more than once, so the following instructiions have been changed from the original document
Add to /etc/rc.local
ifconfig nr0 down
ifconfig nr0 10.0.0.2 up
netromd -i -t 15
Replace /etc/ax25/axports. /etc/ax25/nrports,
/etc/ax25/nrbroadcast, /etc/ax25/ax25d.conf. with the following
ReplaceGM8BPQ-1 and BPQDX with the call and alias you want to use for Spider
# The format of this file is:
# name callsign speed paclen window description
bpq GM8BPQ-1 1200 236 6 Link to LinBPQ
# The format of this file is:
# name callsign alias paclen description
netrom GM8BPQ-1 BPQDX 236 Switch Port
# The format of this file is:
# ax25_name min_obs def_qual worst_qual verbose
bpq 5 255 1 0
# ax25d Configuration File.
# AX.25 Ports begin with a '['.
# NET/ROM Ports begin with a '<'.
NOCALL * * * * * * L
default * * * * * * - sysop /spider/src/client client %u ax25
ID=COM11 Link to Kernel ax25
APPLICATION 1,DX,C GM8BPQ-1,GM8BPQ-1,BPQDX
Create a script to create the socat pair and run kissattach and LinBPQ
socat -d -d -ly pty,raw,echo=0,link=com10 pty,raw,echo=0,link=com11&
chmod a+rw com11
kissattach com10 bpq 10.1.1.1
sudo -u mv linbpq.new linbpq
sudo -u pi ./linbpq
Set runbpq as executable using chmod: chmod a+x /home/pi/linbpq/runbpq
LinBPQ includes an APRS digipeater/IGate, but not an APRS client. It is possible to run other APRS clients (eg Xastir), and configure the LinBPQ APRS code up to bridge packets to/from it.
This uses a pair of socat virtual serial ports, with one defined to the APRS Client and the other to LinBPQ
socat -d -d -ly pty,raw,echo=0,link=com5 pty,raw,echo=0,link=com6&
Add a KISS port definiton to bpq32.cfg - something like
ID=COM5 Bridge to XASTIR
Add the following to the APRSDIGI section. This assumes your APRS RF port is Port 1 and the virtual port is Port 2
Any packet received on Port 1 will be sent unchanged to Port2, and vice versa. Note this is not the same as if they were digipeated - the digi stings are not examined or updated. It looks to the APRS client that is has direct access to the RF port. The Client should not be set to digi anything - that is done by LinBPQ. The Client is just providing the messaging and display/mapping functions.
The TNC-PI is configured much the same as a normal KISS
port, but with the following line added
This will prevent the Node sending KISS Parameters, and thus overriding the values set using the pitnc_setparams program.
Note that SPEED must be set to 19200
TYPE is set to I2C instead of ASYNC, and IOADDR/COMPORT are replaced with I2CBUS and I2CDEVICE:
I2CBUS=0 ; 0 for Version 1 board, 1 for Version 2
I2CDEVICE=16 ; This is in decimal
John Wiseman G8BPQ
10th March 2013