如何在Python中使用BAC0 readRange

pip install bacpypes

from bacpypes.app import BIPSimpleApplication
from bacpypes.local.device import LocalDeviceObject
from bacpypes.object import AnalogInputObject, register_object_type
from bacpypes.primitivedata import Real
from bacpypes.basetypes import EngineeringUnits
from bacpypes.apdu import ReadRangeRequest, ReadRangeACK

# 定义一个模拟的AnalogInputObject对象
@register_object_type(vendor_id=999, object_type=1)
class MyAnalogInputObject(AnalogInputObject):
    def __init__(self, instance):
        super(MyAnalogInputObject, self).__init__(objectIdentifier=('analogInput', instance))
        self.presentValue = Real(0)  # 模拟当前值

# 创建BACnet应用程序
application = BIPSimpleApplication(localDevice=LocalDeviceObject(objectName='TestDevice'))

# 注册自定义的AnalogInputObject对象
register_object_type(objectType=1, object_class=MyAnalogInputObject)

# 处理读取范围请求
def handle_read_range_request(request):
    # 获取请求的参数
    object_type = request.objectIdentifier[0]
    object_instance = request.objectIdentifier[1]
    property_id = request.propertyIdentifier
    array_index = request.propertyArrayIndex
    start_index = request.startingIndex
    end_index = request.endingIndex

    # 执行读取逻辑，这里简单返回一个示例值
    value = Real(5.0)

    # 创建读取范围响应
    response = ReadRangeACK(
        objectIdentifier=(object_type, object_instance),
        propertyIdentifier=property_id,
        propertyArrayIndex=array_index,
        requestStartReference=start_index,
        requestEndReference=end_index,
        resultList=[value],
    )

    # 发送响应
    application.response(response)

# 注册处理读取范围请求的回调函数
application.add_capability(ReadRangeRequest, handle_read_range_request)

# 启动BACnet应用程序
application.run()