def _history_read(uaNode, details, cont):
valueid = ua.HistoryReadValueId()
valueid.NodeId = uaNode.nodeid
valueid.IndexRange = ''
valueid.ContinuationPoint = cont
params = ua.HistoryReadParameters()
params.HistoryReadDetails = details
params.TimestampsToReturn = ua.TimestampsToReturn.Both
params.ReleaseContinuationPoints = False
params.NodesToRead.append(valueid)
result = uaNode.server.history_read(params)[0]
return result
def history_read_events(self, details):
"""
Read event history of a node, low-level function
result code from server is checked and an exception is raised in case of error
"""
valueid = ua.HistoryReadValueId()
valueid.NodeId = self.nodeid
valueid.IndexRange = ''
params = ua.HistoryReadParameters()
params.HistoryReadDetails = details
params.TimestampsToReturn = ua.TimestampsToReturn.Both
params.ReleaseContinuationPoints = False
params.NodesToRead.append(valueid)
result = self.server.history_read(params)[0]
return result