AnalogValueObject with a writable object name

gistfile1.txt

"""
Writable Analog Value Object
"""

from bacpypes.errors import ExecutionError
from bacpypes.primitivedata import Real, CharacterString
from bacpypes.basetypes import EngineeringUnits
from bacpypes.object import register_object_type, WritableProperty, AnalogValueObject

# from bacpypes.consolelogging import ConsoleLogHandler
# ConsoleLogHandler("bacpypes.object")

print("AnalogValueObject properties")
print("    - objectName: %r" % (AnalogValueObject._properties['objectName'],))
print("    - presentValue: %r" % (AnalogValueObject._properties['presentValue'],))

# create an instance
avo = AnalogValueObject()

# peek at the property object
avo_object_name = avo._attr_to_property("objectName")
print("avo_object_name: %r" % (avo_object_name,))
print("    - identifier: %r" % (avo_object_name.identifier,))
print("    - datatype: %r" % (avo_object_name.datatype,))
print("    - optional: %r" % (avo_object_name.optional,))
print("    - mutable: %r" % (avo_object_name.mutable,))
print("    - default: %r" % (avo_object_name.default,))
print("")

try:
    # writing fails
    avo.WriteProperty("objectName", "avo sample")
except ExecutionError:
    print("failed correctly")
avo.debug_contents()
print("")

@register_object_type()
class WritableAnalogValueObject(AnalogValueObject):
    properties = [
        WritableProperty("objectName", CharacterString, optional=False),
    ]

print("WritableAnalogValueObject properties")
print("    - objectName: %r" % (WritableAnalogValueObject._properties['objectName'],))
print("    - presentValue: %r" % (WritableAnalogValueObject._properties['presentValue'],))

wavo = WritableAnalogValueObject()
wavo_object_name = wavo._attr_to_property("objectName")
print("wavo_object_name: %r" % (wavo_object_name,))
print("    - identifier: %r" % (wavo_object_name.identifier,))
print("    - datatype: %r" % (wavo_object_name.datatype,))
print("    - optional: %r" % (wavo_object_name.optional,))
print("    - mutable: %r" % (wavo_object_name.mutable,))
print("    - default: %r" % (wavo_object_name.default,))
print("")

# writing succeeds
wavo.WriteProperty("objectName", "wavo sample")
wavo.debug_contents()
print("")