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<TITLE>BACnet stack - open source BACnet protocol stack</TITLE>
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<img src="images/BACnet.png" align=right>
<h1>BACnet Stack</h1>
<h2>An open source BACnet protocol stack for embedded systems</h2>
<hr>
<h2>About this Project</h2>
<P><a href="http://sourceforge.net/projects/bacnet/">This BACnet protocol stack library</a>
provides a BACnet application layer, network layer and media access (MAC)
layer communications services. It is an open source, royalty-free library
for an embedded system, Windows, Linux, or other operating system. <a href="https://sourceforge.net/projects/bacnet/files/bacnet-tools/">Example
BACnet client and server applications</a> are included.</p>
<P>BACnet - A Data Communication Protocol for Building
Automation and Control Networks - see <a
href="http://www.bacnet.org/">bacnet.org</a>. BACnet is a standard data
communication protocol for Building Automation and Control Networks. BACnet
is an open protocol, which means anyone can contribute to the standard, and
anyone may use it. The only caveat is that the BACnet standard document
itself is copyrighted by ASHRAE, and they sell the document to help defray
costs of developing and maintaining the standard (just like IEEE or ANSI or
ISO).</P>
<P>For software developers, the BACnet protocol is a standard way to send and
receive messages on the wire containing data that is understood by other
BACnet compliant devices. The BACnet standard defines a standard way to
communicate over a number of wires, known as Data Link/Physical Layers:
Ethernet, EIA-485, EIA-232, ARCNET, and LonTalk. The BACnet standard also
defines a standard way to communicate using UDP, IP and HTTP (Web
Services).</P>
There are other open source projects for BACnet:</p>
<ul>
<li><a href="http://vts.sourceforge.net/">VTS</a> - visual test shell for
Win32, used for Visually testing a BACnet implementation. It also includes
a detailed network sniffer for BACnet messages, and the ability to send
any BACnet services. The source code is in the public domain. </li>
<li><a href="http://www.wireshark.org/">Wireshark</a> - an open source,
cross platform protocol analyzer with BACnet support. The detailed BACnet
support began in version 0.10.11 released on May 4, 2005 when Wireshark
was known as Ethereal.</li>
<li><a href="http://bacnet4linux.sourceforge.net/">BACnet4Linux</a> - an
LGPL BACnet application that requires Linux as the OS.</li>
<li><a href="http://bfr.sourceforge.net/">BACnet Firewall Router</a> -an
application that combines BACnet routing capability with traffic management
functions to carefully control access to building automation and control
networks.</li>
<li><a href="http://bacpypes.sourceforge.net/">BACpypes</a> - a
BACnet stack written in Python.</li>
<li><a href="http://bacsharp.sourceforge.net/">BACsharp</a> - a
BACnet/IP stack written in C#.</li>
<li><a href="http://bacnet4j.sourceforge.net/">BACnet4J</a> - a
BACnet/IP stack written in Java that serves as the BACnet layer for
<a href="http://mango.serotoninsoftware.com/">Mango</a>.
Mango is open source Machine-to-Machine software
(aka Industrial Control, SCADA, HMI, or domotics).</li>
</ul>
<p>There are also commercial BACnet protocol source code libraries for BACnet
that are designed for embedded use:</p>
<ul>
<li><a href="http://www.cimetrics.com">Cimetrics</a><font
size="-2"><sup>TM</sup></font> - has a source library
called BACstac/32 as part of their BACNet Protocol Stack SDK.</li>
<li><a href="http://www.polarsoft.biz">Polarsoft</a> - has a
protocol stack source library for embedded use called FreeRange<font
size="-2"><sup>TM</sup></font> and PolarSoft&#174; FreeRange VSB (Very
Small BACnet stack).</li>
<li><a href="http://www.scadaengine.com/">SCADA Engine</a> - The BACnet
Linux Server is a complete BACnet Device running on the linux platform.
The entire source code is available for custom applications and has been
written in ANSI C which has been succesfully ported to Unix,
VxWorks etc. </li>
<li><a href="http://bacnetstack.com/">BACnet Stack</a> - Chipkin
automation systems BACnet stack is an application layer BACnet
library for an embedded system and application development.</li>
</ul>
<h2>Licensing</h2>
<p>Our BACnet protocol stack implementation is specifically designed for the
embedded BACnet appliance, using a GPL with exception license (like <a
href="http://ecos.sourceware.org/">eCos</a>),
which means that any changes to the core code that are distributed are
made available, but the BACnet library can be linked to
proprietary code without it becoming licensed under the GPL.
See the <a href="http://ecos.sourceware.org/license-overview.html">eCos license overview</a> for
easy to read details about this exception to the GPL.
The license does <i>not</i> require users to release the source code of any
<i>applications</i> that are developed with this BACnet stack - only portions of
the BACnet stack that have been modified. Note that those files in this
BACnet stack that are expected to be modified are licensed using the
<a href="http://en.wikipedia.org/wiki/MIT_License">MIT License</a>.<p>
<p>The text of the GPL exception included in each source file is as
follows:</p>
<blockquote>
<p>"As a special exception, if other files instantiate templates or
use macros or inline functions from this file, or you compile
this file and link it with other works to produce a work based
on this file, this file does not by itself cause the resulting
work to be covered by the GNU General Public License. However
the source code for this file must still be made available in
accordance with section (3) of the GNU General Public License."<p>
</blockquote>
<h2>The source code</h2>
<p>The source code is written in C for portability, and includes
unit tests (PC based unit tests) and example application code.
Since the code is designed to be
portable, it compiles with GCC as well as other compilers,
such as Borland C++, Visual C++, MinGW, Code Warrior, IAR, or MicroChip C18.
The source code is also designed to be high quality, readable,
understandable, and easy to use.</p>
<p>The BACnet protocol is an ASHRAE/ANSI/ISO standard, so this library
adheres to that standard. BACnet has no royalties or licensing restrictions,
and <a href="http://www.bacnet.org/VendorID/">registration for a BACnet
vendor ID</a> is free.</p>
<h2>What the code does</h2>
<p>The BACnet stack comes with example applications
that can be run under Linux, Win32, RTOS-32, and just about any embedded
microcontroller.</p>
<p>The BACnet stack includes unit tests can be run in a command shell on Linux using the
unittest.sh script, or using individual .mak files. They were tested under
<a href="http://www.debian.org/">Debian GNU/Linux</a> and <a href="http://www.ubuntu.com/">Ubuntu Linux</a>.</p>
<p>The BACnet stack was functionally tested
using <a href="http://vts.sourceforge.net/">VTS (Visual Test Shell)</a>,
another project hosted on SourceForge, as well as various BACnet controllers,
BACnet workstations, and through BACnet routers. Some versions of the
BACnet stack were BTL tested.<p>
<h2>Demo BACnet Applications</h2>
<p>Using a master Makefile in the project root directory, a dozen
demo applications can be created that run under Linux or Win32.
Linux supports BACnet Ethernet, BACnet/IP, or ARCNET data link layer
for communication, and BACnet/IP is supported under Win32. BACnet Ethernet
can also be used under Win32 with the <a href="http://www.winpcap.org/">WinPcap library</a>.
Root priveleges are required to run the Ethernet or ARCNET interfaces
on Linux, but are not needed to run BACnet/IP.
MS/TP support under Windows or Linux using a USB to RS-485 device is a
work in progress. </p>
<p>To build all the demo applications under linux using the
BACnet/IP datalink layer, use the familiar make command:</p>
<code>
$ make clean all<br>
</code>
<p>You can also modify the Makefile variabiles from the command line to build
with the BACnet MS/TP datalink layer, for example:</p>
<code>
$ make BACDL_DEFINE=-DBACDL_MSTP=1 clean all<br>
</code>
<p>To build all the demo applications under Windows with the
BACnet/IP datalink layer and utilizing the
<a href="http://www.mingw.org/">MinGW tools</a>,
use the <code>build.bat</code> file provided in the root directory.
Note that you may have to
copy the <code>mingw-make.exe</code> to <code>make.exe</code>
to enable the compile.</p>
<code>
$ build.bat<br>
</code>
<p>To build all the demo applications under Windows with the
BACnet/IP datalink layer and utilizing the
<a href=http://www.borland.com/>Borland tools</a>, use the
<code>borland.bat</code> file provided in the root directory.</p>
<code>
$ borland.bat<br>
</code>
<p>To build all the demo applications under Windows using the
BACnet/IP datalink layer utilizing the
<a href="http://codeblocks.org/">Code::Blocks</a> tools, use the
<code>BACnetDemo.workspace</code> file provided in the
<a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/demo">demo</a>
directory.</p>
<p>The demo application accept command line arguments.
To specify an array index of ALL, use "-1".
To make a priority optional, use "0".
The applications also use environment variables to set
datalink layer preferences.
Use <code>--help</code> on the command line to see more options.</p>
<code>
$ demo/server/bacsrv 123<br>
BACnet Server Demo - Device #123<br>
<br>
$ demo/readprop/bacrp<br>
bacrp device-instance object-type object-instance property [index]<br>
<br>
$ demo/writeprop/bacwp<br>
bacwp device-instance object-type object-instance property priority index tag value [tag value...]<br>
<br>
$ demo/readfile/bacarf<br>
bacarf device-instance file-instance local-name<br>
<br>
$ demo/writefile/bacawf<br>
bacawf device-instance file-instance local-name<br>
<br>
$ demo/reinit/bacrd<br>
Usage: bacrd device-instance state [password]<br>
Send BACnet ReinitializeDevice service to device.<br>
<br>
$ demo/whohas/bacwh<br>
Usage: bacwh object-type object-instance | object-name<br>
Send BACnet WhoHas request to devices, and wait for responses.<br>
<br>
$ demo/dcc/bacdcc<br>
Usage: bacdcc device-instance state timeout [password]<br>
Send BACnet DeviceCommunicationControl service to device.<br>
<br>
$ demo/timesync/bacts<br>
Received TimeSyncronization Request<br>
2006/8/30 07:10:45.00<br>
<br>
$ demo/ucov/bacucov<br>
Usage: bacucov pid device-id object-type object-instance time property tag value [priority] [index]<br>
<br>
$ demo/whois/bacwi<br>
Usage: bacwi device-instance | device-instance-min device-instance-max<br>
Send BACnet WhoIs request to devices, and wait for responses.<br>
<br>
The device-instance can be 0 to 4194303, or -1 for ALL.<br>
The device-instance can also be specified as a range.<br>
<br>
</code>
<p>The demos can be compiled under Win32 using <a href="http://www.mingw.org/">MinGW - Minimalist GNU for Windows</a>,
<a href="http://www.borland.com/bcppbuilder/freecompiler/">Borland C++</a>, or
<a href="http://msdn.microsoft.com/visualc/vctoolkit2003/">Microsoft Visual C++</a>, which
are free command line compilers. Be sure to pick up the free
<a href="http://info.borland.com/devsupport/bcppbuilder/patches/#freecompiler55">patches (service packs) for the Borland C++ compiler</a>
(<a href="http://info.borland.com/devsupport/bcppbuilder/patches/bcc55/bcc55sp1.zip">SP1</a>,
<a href="http://info.borland.com/devsupport/bcppbuilder/patches/bcc55/bcc55sp2.exe">SP2</a>),
as well as the free turbo debugger.
It is also possible to create Win32 projects using the
free <a href="http://msdn.microsoft.com/vstudio/express/">Visual Studio Express Edition</a> after
downloading the platform development kit for your operating system.
You can also use <a href="http://www.mingw.org/">MinGW - Minimalist GNU for Windows</a> which comes with Code::Blocks.
I frequently use <a href="http://codeblocks.org/">Code::Blocks</a> for
compiling the unit tests using the MinGW compiler and
created some Code::Block projects for some of the demos.
I have also used <a href="http://codeblocks.org/">Code::Blocks</a> with
the Borland C++ compiler and it successfully compiles and runs the code.</p>
<p><a href="https://sourceforge.net/projects/bacnet/files/bacnet-tools/">BACnet-Tools</a> -
the example applications are compiled for Windows and can be downloaded from
SourceForge.</p>
<p>To build the demo applications under Linux, such as
<a href="http://ubuntu.com/">Ubuntu</a>, you may need to install
some build tools.</p>
<code>
$ sudo apt-get install build-essential subversion-tools
</code>
<h2>Example BACnet Server Ported to Various Architectures</h2>
<p>There is a Makefile in the
<a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/ports/rtos32">ports/rtos32</a>
directory, and a sample application that runs
under <a href="http://www.on-time.com/">RTOS-32</a>.
It currently uses the BACnet/IP data link layer for communication, and also
has an MS/TP datalink layer sample application.
It compiles using <a href="http://borland.com/">Borland C++</a>.</p>
<p>There is a project in the
<a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/ports/pic18f6720">ports/pic18f6720</a>
directory, and a sample
application that can be built using <a href="http://microchip.com">MP-Lab</a>
and the Microchip compiler MCC18. The datalink layer uses BACnet MS/TP
and the example uses several different objects and services.</p>
<p>There is a project in the
<a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/ports/at91sam7s">ports/at91sam7s</a>
directory for the AT91SAM7S-EK
demo board. There is a server application that can be built using
the GNU ARM tools, such as
<a href="http://www.codesourcery.com/gnu_toolchains/arm">GNU Toolchain for ARM</a>,
<a href="http://www.gnuarm.com/">GNU ARM</a>,
<a href="http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/">WinARM</a>,
<a href="http://www.yagarto.de/">YAGARTO</a>,
or <a href="http://www.rowley.co.uk/arm/">Rowley Crossworks for ARM</a> toolchains on the Windows platform.
The datalink layer uses BACnet MS/TP
and the example uses several different objects and services.</p>
<p>There is a project in the
<a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/ports/atmega168">ports/atmega168</a>
directory, and a sample
server application that can be built using
<a href="http://www.avrfreaks.net/wiki/index.php/Documentation:AVR_GCC/AVR_GCC_Tool_Collection">GCC-AVR</a> or
<a href="http://winavr.sourceforge.net/">WinAVR</a> for Atmel AVR series of microcontrollers.
There is also a project in the
<a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/ports/bdk-atxx4-mstp">ports/bdk-atxx4-mstp</a>
directory which works on the <a href="http://bacnetdevelopmentkit.com/">ATmega644 based BACnet Development Kit</a>.</p>
<p>Both projects use the BACnet MS/TP datalink layer
and the example uses several different objects and services.
In additional to the free tools listed above, the AVR projects
can be developed using the commercial
<a href="http://www.rowley.co.uk/avr/">Rowley Crossworks for AVR</a>
on the Windows, MAC OS X, Linux, or Solaris platform. CrossWorks is a complete
development environment.
The AVR projects can also be developed using the commercial
<a href="http://www.iar.com/en/Products/IAR-Embedded-Workbench/AVR/">IAR Embedded Workbench for Atmel AVR</a>
environment on Windows.</p>
<p>There is a project in the
<a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/ports/stm32f10x">ports/stm32f10x</a>
directory, and a sample server application that can be built using
<a href="http://www.iar.com/">IAR Embedded Workbench for ARM</a>.
It was written for the 2011
<a href="http://www.stm32challenge.com/">STM32 Design Challenge,</a>
and was one of the finalists.
The Target is an ARM Cortex-M3 microcontroller, and the design utilizes
the <a href="http://www.arm.com/products/processors/cortex-m/cortex-microcontroller-software-interface-standard.php">CMSIS</a> and
STM32 Peripheral Driver Library.
The port uses the BACnet MS/TP datalink layer
and the example uses several different objects and services.</p>
<TABLE border="1" width="100%" cellpadding="1" cellspacing="0"
summary="BACnet services supported matrix">
<TBODY>
<TR><H2>BACnet services supported matrix</H2>
<p>The BACnet stack currently implements the following services listed in the
the table. We plan to add the rest of the services as we go.
With the services that are implemented, you could build a BACnet device
that meets the standardized profile for a BACnet Smart Sensor,
BACnet Smart Actuator, or a BACnet Application Specific Controller.</p></TR>
<TR>
<TD bgcolor="#CCF6F6" width="50%" valign="top"><b>BACnet Service</b></td>
<TD bgcolor="#CCF6F6" width="25%" align="center" valign="top"><b>Initiate</b></td>
<TD bgcolor="#CCF6F6" width="25%" align="center" valign="top"><b>Execute</b></td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Who Is</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">I Am</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Who Has</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">I Have</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Read Property</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Write Property</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Device Communication Control</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">ReinitializeDevice</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Atomic Read File</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Atomic Write File</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Time Synchronization</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">UTC Time Synchronization</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Subscribe COV</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Confirmed COV Notification</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Unconfirmed COV Notification</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Read Property Multiple</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Read Property Conditional</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Read Range</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Write Property Multiple</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Get Alarm Summary</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Get Event Information</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Get Enrollment Summary</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Acknowledge Alarm</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Confirmed Event Notification</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Unconfirmed Event Notification</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Unconfirmed Text Message</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Confirmed Text Message</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Add List Element</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Remove List Element</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Create Object</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Delete Object</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Unconfirmed Private Transfer</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">Confirmed Private Transfer</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">VT Open</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">VT Data</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="50%" valign="top">VT Close</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
</TBODY>
</TABLE>
<TABLE border="1" width="100%" cellpadding="1" cellspacing="0"
summary="BACnet Objects">
<TBODY>
<TR><H2>BACnet Objects</H2>
<p>The BACnet stack currently implements an example Device Object, and
handles all of the ReadProperty and ReadPropertyMultiple inquiries for
the required Device Object properties. The stack handles Who-Is inquiries
with an I-Am, WhoHas with I-Have, and handles reject messages for
services not currently supported or implemented by your device.
There is built-in handling for DeviceCommunicationControl.</p>
<p>The example handlers interact with example objects by way of the Device
object. There are example objects for the developer to use as a template
when customizing the objects for their device.</p>
<p>File Objects are conditionally included in the demonstation
applications. The files can be accessed using WriteProperty,
ReadProperty, Who-Has, AtomicWriteFile, or AtomicReadFile services.</p></TR>
<TR>
<TD bgcolor="#CCF6F6" width="75%" valign="top"><b>BACnet Object</b></td>
<TD bgcolor="#CCF6F6" width="25%" align="center" valign="top"><b>Code Example</b></td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Accumulator</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Analog Input</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Analog Output</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Analog Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Averaging</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Binary Input</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Binary Output</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Binary Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Calendar</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Command</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Device</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Event Enrollment</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">File</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Group</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Life Safety Point</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Life Safety Zone</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Loop</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Multi-state Input</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Multi-state Output</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Multi-state Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Notification Class</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Program</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Pulse Converter</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Schedule</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Trend Log</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Access Door</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Event Log</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Load Control</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">Yes</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Structured View</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Trend Log Multiple</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Access Point</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Access Zone</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Access User</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Access Rights</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Access Credential</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Credential Data Input</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">CharacterString Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">DateTime Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Large Analog Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">BitString Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">OctetString Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Time Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Integer Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Positive Integer Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Date Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">DateTime Pattern Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Time Pattern Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Date Pattern Value</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Network Security</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
<TR>
<TD bgcolor="#FFFFDD" width="75%" valign="top">Global Group</td>
<TD bgcolor="#FFFFDD" width="25%" align="center" valign="top">-</td>
</TR>
</TBODY>
</TABLE>
<h2>Getting Involved</h2>
<p>If you want to help out on this project, join the <a href="http://lists.sourceforge.net/mailman/listinfo/bacnet-developers">developers mailing list</a>, introduce yourself, and tell us what you would like to do.
If you are trying to implement a BACnet device or service using this project,
you are welcome to join the same <a href="http://lists.sourceforge.net/mailman/listinfo/bacnet-developers">developers mailing list</a> as well.</p>
<p>More details about the project can be found on
the <a href="http://sourceforge.net/projects/bacnet/">BACnet Source Forge Project Page</a></p>
<p>There is documentation that <a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/doc/README.developer">describes the mechanisms in the BACnet Stack</a>.
I wrote up some <a href="http://bacnet.svn.sourceforge.net/viewvc/bacnet/trunk/bacnet-stack/doc/README.faq">answers to some frequently asked questions</a>.
Of course, there are a handful of text files in the doc directory of
the project with more useful information.</p>
<p><a
href="http://sourceforge.net/project/showfiles.php?group_id=117598&package_id=140172">BACnet
Stack released files download</a></p>
<p>You can get the latest BACnet protocol stack source code using
the <a href="http://subversion.tigris.org/">Subversion</a> version control system.
The main development branch is
at: <a href="https://bacnet.svn.sourceforge.net/svnroot/bacnet/trunk/bacnet-stack/">https://bacnet.svn.sourceforge.net/svnroot/bacnet/trunk/bacnet-stack/</a>. This
has the absolute latest code and features. Anyone doing development on the BACnet protocol stack
should be using this branch. The stable releases are
at: <a href="https://bacnet.svn.sourceforge.net/svnroot/bacnet/tags/">https://bacnet.svn.sourceforge.net/svnroot/bacnet/tags/</a>. This
matches the released version downloadable through SourceForge. Anyone doing project development using
the BACnet protocol stack should be using the tags branch and an appropriate version tag.
The custom and vendor branches are
at: <a href="https://bacnet.svn.sourceforge.net/svnroot/bacnet/branches/">https://bacnet.svn.sourceforge.net/svnroot/bacnet/branches/</a>.
The <a href="https://bacnet.svn.sourceforge.net/svnroot/bacnet/branches/jbennet/">JBennet branch</a> includes a
derivative project that is designed for a BACnet Client.</p>
<p>To check out the trunk, use "svn co", e.g.</p>
<blockquote>
<code>svn co https://bacnet.svn.sourceforge.net/svnroot/bacnet/trunk/bacnet-stack/</code><br />
or for the stable releases:<br />
<code>svn co https://bacnet.svn.sourceforge.net/svnroot/bacnet/tags/bacnet-stack-0-5-0/</code><br />
or for the JBennet branch:<br />
<code>svn co https://bacnet.svn.sourceforge.net/svnroot/bacnet/branches/jbennet/</code>
</blockquote>
<h2>BACnet Developer Resources</h2>
There are a number of resources that can help you develop a BACnet product or project.
<ul>
<li><a href="http://vts.sourceforge.net/">VTS</a> - visual test shell for
Win32, used for Visually testing a BACnet implementation. It also includes
a detailed network sniffer for BACnet messages, and the ability to send
any BACnet services. The source code is in the public domain. </li>
<li><a href="http://www.wireshark.org/">Wireshark</a> - an open source,
cross platform protocol analyzer with BACnet support. The detailed BACnet
support in began in version 0.10.11 released on May 4, 2005 when Wireshark
was known as Ethereal. Also, BACnet MS/TP capture support was added
in Wireshark version 1.1.0.
The <a href=http://steve.kargs.net/bacnet/wireshark-and-bacnet-mstp/>demo application mstpcap</a>
can be used to capture BACnet MS/TP using an RS-485 converter,
and save the data to a capture file that can be viewed with Wireshark.</li>
<li><a href="http://www.ubuntu.com/">Ubuntu Linux</a> or
<a href="http://www.debian.org/">Debian Linux</a> - my
development platforms of choice.
Linux makes a great development platform
because all the necessary development tools are included.</li>
<li><a href="http://www.codeblocks.org/">Code::Blocks</a> - a free cross-platform
open source C/C++ IDE. Includes the MinGW compiler for Win32.</li>
<li>Win32 development can use <a href="http://www.borland.com/bcppbuilder/freecompiler/">Borland C++</a> or
<a href="http://msdn.microsoft.com/visualc/vctoolkit2003/">Microsoft Visual C++</a>,
both of which are free (as in beer) command line compilers. Be sure to pick up the free
<a href="http://info.borland.com/devsupport/bcppbuilder/patches/#freecompiler55">patches (service packs) for the Borland C++ compiler</a>
(<a href="http://info.borland.com/devsupport/bcppbuilder/patches/bcc55/bcc55sp1.zip">SP1</a>,
<a href="http://info.borland.com/devsupport/bcppbuilder/patches/bcc55/bcc55sp2.exe">SP2</a>),
as well as the free turbo debugger.</li>
</ul>
<p><a href="http://www.bacnet.org/Developer/index.html">BACnet
Developer Help</a></p>
<p><a href="http://www.bacnetinternational.org/associations/8066/btl/?page=47">BACnet
International Developer Resources</a></p>
<h2>Products and Projects that use this BACnet Stack</h2>
<p>Did you develop a product using this BACnet stack? <a href="http://kargs.net/contacts.html">Let us know</a>, and you
can get a little recognition for your hard work!</p>
<p><a href="http://bacnetdevelopmentkit.com/">BACnet Development Kit</a> - An
Atmel ATmega644 based development kit designed to kickstart BACnet MS/TP
development.</p>
<p><a href="http://wattstopper.com/DLM/">Digital Lighting Management</a> -
offers connectivity without complexity for remote system management and
control of lights and plug loads. Just one device in each room network has to
be connected to a BACnet MS/TP segment for centralized control.</p>
<p><a href="http://www.controlsystemworks.com/">CSWorks</a> - a development
framework for building web-based HMI (Human Machine Interface),
SCADA (Supervisory Control And Data Acquisition),
EMI (Enterprise Manufacturing Intelligence) and
M2M (Machine to Machine) software applications.</p>
<p><a href="http://sensors.scinterface.com/">SCInterface&trade; = Sensor Control Interface</a> - middleware
platform for managing legacy and modern-day sensors through a centralized
interface.</p>
<p><a href="http://sourceforge.net/projects/bacnet-sim/">BACnetSim</a> - a
portable implementation of the BACnet data communication protocol.
BACnetSim is meant for embedded devices and use MS/TP as the media
access layer. BACnetSim is a fork of bacnet-stack-0.0.1</p>
<p><a href="http://simulationresearch.lbl.gov/bcvtb">Building Controls Virtual Test Bed</a> - a
software environment that allows coupling different simulation programs
including Dymola, EnergyPlus, MATLAB/Simulink and Radiance for co-simulation,
and to couple these programs to control systems.</p>
<p><a href="http://linde.caltech.edu/articles/the-prodigal-sun-returns-the-coelostat-in-the-linde-robinson-laboratory">The coelostat in the Linde + Robinson Laboratory</a> at Caltech.</p>
<hr>
<A href="http://sourceforge.net"> <IMG
src="http://sourceforge.net/sflogo.php?group_id=117598&amp;type=5"
width="210" height="62" border="0" alt="SourceForge.net Logo" /></A>
<p><font size="-2"><b>ASHRAE<sup>&reg;</sup></b> and
<b>BACnet<sup>&reg;</sup></b> are registered trademarks of the American
Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.,
1791 Tullie Circle NE, Atlanta, GA 30329.</font> </p>
<p>Website updated 19-December-2011 by <a href="http://steve.kargs.net/">Steve Karg</a>.</p>
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