mirror of
https://github.com/JoelBender/bacpypes
synced 2025-09-28 22:15:23 +08:00
146 lines
4.4 KiB
Python
Executable File
146 lines
4.4 KiB
Python
Executable File
#!/usr/bin/env python
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"""
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This application presents a 'console' prompt to the user asking for read commands
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which create ReadPropertyRequest PDUs, waits for the response, then decodes the
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value if it is application encoded. This is useful for reading the values
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of propietary properties when the datatype isn't known.
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"""
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import sys
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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.consolecmd import ConsoleCmd
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from bacpypes.core import run, deferred, enable_sleeping
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from bacpypes.iocb import IOCB
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from bacpypes.pdu import Address
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from bacpypes.apdu import ReadPropertyRequest
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from bacpypes.primitivedata import Tag, ObjectIdentifier
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from bacpypes.app import BIPSimpleApplication
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from bacpypes.local.device import LocalDeviceObject
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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_application = None
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#
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# ReadPropertyAnyConsoleCmd
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#
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@bacpypes_debugging
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class ReadPropertyAnyConsoleCmd(ConsoleCmd):
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def do_read(self, args):
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"""read <addr> <objid> <prop> [ <indx> ]"""
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args = args.split()
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if _debug: ReadPropertyAnyConsoleCmd._debug("do_read %r", args)
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try:
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addr, obj_id, prop_id = args[:3]
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obj_id = ObjectIdentifier(obj_id).value
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# build a request
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request = ReadPropertyRequest(
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objectIdentifier=obj_id,
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propertyIdentifier=prop_id,
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)
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request.pduDestination = Address(addr)
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if len(args) == 4:
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request.propertyArrayIndex = int(args[3])
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if _debug: ReadPropertyAnyConsoleCmd._debug(" - request: %r", request)
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# make an IOCB
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iocb = IOCB(request)
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if _debug: ReadPropertyAnyConsoleCmd._debug(" - iocb: %r", iocb)
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# give it to the application
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deferred(this_application.request_io, iocb)
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# wait for it to complete
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iocb.wait()
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# do something for success
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if iocb.ioResponse:
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apdu = iocb.ioResponse
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# peek at the value tag
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value_tag = apdu.propertyValue.tagList.Peek()
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if _debug: ReadPropertyAnyConsoleCmd._debug(" - value_tag: %r", value_tag)
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# make sure that it is application tagged
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if value_tag.tagClass != Tag.applicationTagClass:
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sys.stdout.write("value is not application encoded\n")
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else:
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# find the datatype
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datatype = Tag._app_tag_class[value_tag.tagNumber]
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if _debug: ReadPropertyAnyConsoleCmd._debug(" - datatype: %r", datatype)
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if not datatype:
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raise TypeError("unknown datatype")
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# cast out the value
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value = apdu.propertyValue.cast_out(datatype)
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if _debug: ReadPropertyAnyConsoleCmd._debug(" - value: %r", value)
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sys.stdout.write("%s (%s)\n" % (value, datatype))
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sys.stdout.flush()
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# do something for error/reject/abort
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if iocb.ioError:
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sys.stdout.write(str(iocb.ioError) + '\n')
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except Exception as error:
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ReadPropertyAnyConsoleCmd._exception("exception: %r", error)
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#
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# __main__
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#
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def main():
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global this_application
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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(ini=args.ini)
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if _debug: _log.debug(" - this_device: %r", this_device)
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# provide max segments accepted if any kind of segmentation supported
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if args.ini.segmentationsupported != 'noSegmentation':
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this_device.maxSegmentsAccepted = int(args.ini.maxsegmentsaccepted)
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# make a simple application
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this_application = BIPSimpleApplication(this_device, args.ini.address)
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if _debug: _log.debug(" - this_application: %r", this_application)
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# make a console
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this_console = ReadPropertyAnyConsoleCmd()
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if _debug: _log.debug(" - this_console: %r", this_console)
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# enable sleeping will help with threads
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enable_sleeping()
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_log.debug("running")
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run()
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_log.debug("fini")
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if __name__ == "__main__":
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main()
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