There are a dozen or so demo applications that are built
with the default makefiles.  These demo applications are
copied to the bin/ directory.  They can be used in
scripts and batch files to test BACnet devices or query
information on the BACnet network, as well as simulate
a BACnet device.

The demo applications make use of Environment Variables
to configure the network.
BACNET_IFACE - interface to use for the datalink layer
  For Linux, this is something like eth0 or /dev/ttyS0.
  For Windows, this is something like 192.168.0.1 or COM4
  Defaults to NULL.

BACNET_IP_PORT - BACnet/IP port number.
  Defaults to 47808.

BACNET_BBMD_PORT - BACnet/IP BBMD port number.
  Defaults to 47808.

BACNET_BBMD_TIMETOLIVE - BACnet/IP BBMD time-to-live seconds.
  Defaults to 0xFFFF.

BACNET_BBMD_ADDRESS - dotted IP address or domain name of BBMD.
  Attempts to register with the BBMD if this variable is present.

BACNET_MAX_INFO_FRAMES - BACnet MS/TP max-info-frames parameter.
  Defaults to 127.

BACNET_MSTP_BAUD - BACnet MS/TP baud rate.
  Defaults to 38400.

BACNET_MSTP_MAC - BACnet MS/TP MAC address.
  Defaults to 127.

The demo client applications can also perform static
address binding using the file "address_cache" in the
directory where the application is called (defined
in src/address.c file).  The format of the address_cache
is a line by line of device ids and addresses:
55555 AC:10:56:06:BA:C0 26001 19 50
where:
55555=device id in decimal
AC:10:56:06:BA:C0=MAC address (router address) in hex
26001=DNET network number in decimal
19=DADR MAC address in hex.  Use colon to separate multibyte address.
50=Max APDU
