Device Services¶
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class
WhoIsIAmServices
(Capability)¶ This class provides the capability to initiate and respond to device-address-binding PDUs.
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do_WhoIsRequest
(apdu)¶ Parameters: apdu (WhoIsRequest) – Who-Is Request from the network See Clause 16.10.1 for the parameters to this service.
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do_IAmRequest
(apdu)¶ Parameters: apdu (IAmRequest) – I-Am Request from the network See Clause 16.10.3 for the parameters to this service.
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who_is
(self, low_limit=None, high_limit=None, address=None)¶ Parameters: This is a utility function that makes it simpler to generate a WhoIsRequest.
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class
WhoHasIHaveServices
(Capability)¶ This class provides the capability to initiate and respond to device and object binding PDU’s.
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do_WhoHasRequest
(apdu)¶ Parameters: apdu (WhoHasRequest) – Who-Has Request from the network See Clause 16.9.1 for the parameters to this service.
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do_IHaveRequest
(apdu)¶ Parameters: apdu (IHaveRequest) – I-Have Request from the network See Clause 16.9.3 for the parameters to this service.
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Support Classes¶
There are a few support classes in this module that make it simpler to build the most common BACnet devices.
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class
CurrentDateProperty
(Property)¶ This class is a specialized readonly property that always returns the current date as provided by the operating system.
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ReadProperty
(self, obj, arrayIndex=None)¶ Returns the current date as a 4-item tuple consistent with the Python implementation of the
Date
primitive value.
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WriteProperty
(self, obj, value, arrayIndex=None, priority=None)¶ Object instances of this class are readonly, so this method raises a writeAccessDenied error.
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class
CurrentTimeProperty
(Property)¶ This class is a specialized readonly property that always returns the current local time as provided by the operating system.
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ReadProperty
(self, obj, arrayIndex=None)¶ Returns the current date as a 4-item tuple consistent with the Python implementation of the
Time
primitive value.
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WriteProperty
(self, obj, value, arrayIndex=None, priority=None)¶ Object instances of this class are readonly, so this method raises a writeAccessDenied error.
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class
LocalDeviceObject
(DeviceObject)¶ The
LocalDeviceObject
is an implementation of aDeviceObject
that provides default implementations for common properties and behaviors of a BACnet device. It has default values for communications properties, returning the local date and time, and the objectList property for presenting a list of the objects in the device.