mirror of
https://github.com/JoelBender/bacpypes
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166 lines
5.1 KiB
Python
Executable File
166 lines
5.1 KiB
Python
Executable File
#!/usr/bin/python
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"""
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Mutliple Read Property
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This application has a static list of points that it would like to read. It reads the
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values of each of them in turn and then quits.
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"""
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from collections import deque
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from bacpypes.debugging import bacpypes_debugging, ModuleLogger
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from bacpypes.consolelogging import ConfigArgumentParser
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from bacpypes.core import run, stop, deferred
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from bacpypes.pdu import Address
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from bacpypes.app import LocalDeviceObject, BIPSimpleApplication
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from bacpypes.object import get_datatype
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from bacpypes.apdu import ReadPropertyRequest, Error, AbortPDU, ReadPropertyACK
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from bacpypes.primitivedata import Unsigned
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from bacpypes.constructeddata import Array
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from bacpypes.basetypes import ServicesSupported
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# some debugging
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_debug = 0
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_log = ModuleLogger(globals())
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# globals
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this_device = None
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this_application = None
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this_console = None
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# point list
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point_list = [
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('1.2.3.4', 'analogValue', 1, 'presentValue'),
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('1.2.3.4', 'analogValue', 2, 'presentValue'),
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]
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#
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# ReadPointListApplication
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#
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@bacpypes_debugging
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class ReadPointListApplication(BIPSimpleApplication):
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def __init__(self, point_list, *args):
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if _debug: ReadPointListApplication._debug("__init__ %r, %r", point_list, args)
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BIPSimpleApplication.__init__(self, *args)
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# keep track of requests to line up responses
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self._request = None
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# make a list of the response values
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self.response_values = []
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# turn the point list into a queue
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self.point_queue = deque(point_list)
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def next_request(self):
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if _debug: ReadPointListApplication._debug("next_request")
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# check to see if we're done
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if not self.point_queue:
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if _debug: ReadPointListApplication._debug(" - done")
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stop()
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return
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# get the next request
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addr, obj_type, obj_inst, prop_id = self.point_queue.popleft()
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# build a request
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self._request = ReadPropertyRequest(
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objectIdentifier=(obj_type, obj_inst),
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propertyIdentifier=prop_id,
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)
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self._request.pduDestination = Address(addr)
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if _debug: ReadPointListApplication._debug(" - request: %r", self._request)
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# forward it along
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BIPSimpleApplication.request(self, self._request)
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def confirmation(self, apdu):
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if _debug: ReadPointListApplication._debug("confirmation %r", apdu)
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if isinstance(apdu, Error):
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if _debug: ReadPointListApplication._debug(" - error: %r", apdu)
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self.response_values.append(apdu)
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elif isinstance(apdu, AbortPDU):
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if _debug: ReadPointListApplication._debug(" - abort: %r", apdu)
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self.response_values.append(apdu)
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elif (isinstance(self._request, ReadPropertyRequest)) and (isinstance(apdu, ReadPropertyACK)):
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# find the datatype
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datatype = get_datatype(apdu.objectIdentifier[0], apdu.propertyIdentifier)
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if _debug: ReadPointListApplication._debug(" - datatype: %r", datatype)
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if not datatype:
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raise TypeError, "unknown datatype"
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# special case for array parts, others are managed by cast_out
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if issubclass(datatype, Array) and (apdu.propertyArrayIndex is not None):
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if apdu.propertyArrayIndex == 0:
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value = apdu.propertyValue.cast_out(Unsigned)
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else:
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value = apdu.propertyValue.cast_out(datatype.subtype)
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else:
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value = apdu.propertyValue.cast_out(datatype)
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if _debug: ReadPointListApplication._debug(" - value: %r", value)
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# save the value
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self.response_values.append(value)
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# fire off another request
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deferred(self.next_request)
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#
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# __main__
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#
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try:
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# parse the command line arguments
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args = ConfigArgumentParser(description=__doc__).parse_args()
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if _debug: _log.debug("initialization")
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if _debug: _log.debug(" - args: %r", args)
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# make a device object
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this_device = LocalDeviceObject(
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objectName=args.ini.objectname,
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objectIdentifier=int(args.ini.objectidentifier),
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maxApduLengthAccepted=int(args.ini.maxapdulengthaccepted),
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segmentationSupported=args.ini.segmentationsupported,
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vendorIdentifier=int(args.ini.vendoridentifier),
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)
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# build a bit string that knows about the bit names
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pss = ServicesSupported()
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pss['whoIs'] = 1
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pss['iAm'] = 1
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pss['readProperty'] = 1
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pss['writeProperty'] = 1
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# set the property value to be just the bits
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this_device.protocolServicesSupported = pss.value
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# make a simple application
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this_application = ReadPointListApplication(point_list, this_device, args.ini.address)
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# fire off a request when the core has a chance
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deferred(this_application.next_request)
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_log.debug("running")
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run()
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# dump out the results
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for request, response in zip(point_list, this_application.response_values):
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print request, response
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except Exception, e:
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_log.exception("an error has occurred: %s", e)
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finally:
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_log.debug("finally")
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