本文整理汇总了Python中opcua.Server.historize_node_data_change方法的典型用法代码示例。如果您正苦于以下问题：Python Server.historize_node_data_change方法的具体用法？Python Server.historize_node_data_change怎么用？Python Server.historize_node_data_change使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类opcua.Server的用法示例。
在下文中一共展示了Server.historize_node_data_change方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: database
# 需要导入模块: from opcua import Server [as 别名]
# 或者: from opcua.Server import historize_node_data_change [as 别名]
uri = "http://examples.freeopcua.github.io"
idx = server.register_namespace(uri)
# get Objects node, this is where we should put our custom stuff
objects = server.get_objects_node()
# populating our address space
myobj = objects.add_object(idx, "MyObject")
myvar = myobj.add_variable(idx, "MyVariable", ua.Variant(0, ua.VariantType.Double))
myvar.set_writable() # Set MyVariable to be writable by clients
# Configure server to use sqlite as history database (default is a simple memory dict)
server.iserver.history_manager.set_storage(HistorySQLite("my_datavalue_history.sql"))
# starting!
server.start()
# enable data change history for this particular node, must be called after start since it uses subscription
server.historize_node_data_change(myvar, period=None, count=100)
try:
count = 0
while True:
time.sleep(1)
count += 0.1
myvar.set_value(math.sin(count))
finally:
# close connection, remove subscriptions, etc
server.stop()