BACnet Server Example Python 2.7

---

!!! This example is no longer maintained. This example was last updated for CAS BACnet Stack version: 3.31.3.0

Please see the BACnetServerExamplePython 3.x

---

A basic BACnet IP server example written with Python 2.7 using the CAS BACnet Stack

• Device: 389001 (Device Rainbow)
  • analog_input: 0 (AnalogInput Bronze)
  • analog_output: 1 (AnalogOutput Chartreuse)
  • analog_value: 2 (AnalogValue Diamond)
  • binary_input: 3 (BinaryInput Emerald)
  • binary_output: 4 (BinaryOutput Fuchsia)
  • binary_value: 5 (BinaryValue Gold)
  • multi_state_input: 13 (MultiStateInput Hot Pink)
  • multi_state_output: 14 (MultiStateOutput Indigo)
  • multi_state_value: 19 (MultiStateValue Kiwi)
  • characterstring_value: 40 (CharacterstringValue Nickel)
  • integer_value: 45 (IntegerValue Purple)
  • large_analog_value: 46 (LargeAnalogValue Quartz)
  • positive_integer_value: 48 (PositiveIntegerValue Silver)
  • NetworkPort: 56 (NetworkPort Umber)

Example output

FYI: CAS BACnet Stack Python 2.7 Server Example v1.0.0
FYI: https://github.com/chipkin/BACnetServerExamplePython
('FYI: Libary path: ', WindowsPath('X:/Work/Repos/BACnetServerExamplePython2.7/CASBACnetStack_x86_Debug.dll'))
FYI: CAS BACnet Stack version: 3.31.3.0
FYI: CAS BACnet Stack python adapter version:0.0.4
FYI: Connecting UDP Resource to port=[47808]
('FYI: Local IP address: ', [192, 168, 1, 82])
FYI: Registering the Callback Functions with the CAS BACnet Stack
FYI: Setting up server Device. device.instance=[389001]
FYI: Adding AnalogInput. AnalogInput.instance=[0]
FYI: Adding BinaryInput. BinaryInput.instance=[3]
FYI: Adding MultiStateInput. MultiStateInput.instance=[13]
FYI: Adding analogOutput. analogOutput.instance=[1]
FYI: Adding analogValue. analogValue.instance=[2]
FYI: Adding binaryOutput. binaryOutput.instance=[4]
FYI: Adding binaryValue. binaryValue.instance=[5]
FYI: Adding multiStateOutput. multiStateOutput.instance=[14]
FYI: Adding multiStateOutput. multiStateValue.instance=[19]
FYI: Adding characterstringValue. characterstringValue.instance=[40]
FYI: Adding integerValue. integerValue.instance=[45]
FYI: Adding largeAnalogValue. largeAnalogValue.instance=[46]
FYI: Adding positiveIntegerValue. positiveIntegerValue.instance=[48]
FYI: Adding networkPort. networkPort.instance=[50]
FYI: Sending I-AM broadcast
('CallbackGetPropertyUInt', 389001L, 8, 389001L, 62L, False, 0L)
('CallbackGetPropertyUInt', 389001L, 8, 389001L, 120L, False, 0L)
('CallbackGetPropertyEnumerated', 389001L, 8, 389001L, 107L, 0L)

Building

This python script requires the CAS BACnet Stack DLL that can be purchased from Chipkin Automation Systems.

Place the DLL in the root folder. For Windows: CASBACnetStack_x64_Release.dll and CASBACnetStack_x64_Debug.dll. For Linux: libCASBACnetStack_x64_Release.so and CASBACnetStack_x64_Debug.so.

To install pip for python 2.7 follow these instructions https://9to5tutorial.com/installing-pip-in-python-2-7

curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py
python2 get-pip.py

Install the required packages.

pip install pathlib dnspython netifaces

Running

python2 BACnetServerExample.py

Useful links

• Python ctypes
• Python Bindings Overview
• CAS BACnet Explorer - A BACnet Client that can be used to discover and poll this example BACnet Server.