1 files changed, 45 insertions, 0 deletions
diff --git a/src/opcua/client/qopcuanode.cpp b/src/opcua/client/qopcuanode.cpp
index 27003a3..7647bc5 100644
--- a/src/opcua/client/qopcuanode.cpp
+++ b/src/opcua/client/qopcuanode.cpp
@@ -784,6 +784,51 @@ bool QOpcUaNode::browse(const QOpcUaBrowseRequest &request)
   return d->m_impl->browse(request);
 }
 
+/*!
+    Starts a read history request for this node. This is the Qt OPC UA representation for the OPC UA
+    ReadHistory service for reading raw historical data defined in
+    \l {https://reference.opcfoundation.org/v104/Core/docs/Part4/5.10.3/} {OPC-UA part 4, 5.10.3}.
+    The start timestamp, end timestamp, number of values per node and returnBounds can
+    be specified in the according parameters.
+
+    Returns a \l QOpcUaHistoryReadResponse which contains the state of the request if the asynchronous
+    request has been successfully dispatched. The results are returned in the
+    \l QOpcUaHistoryReadResponse::readHistoryDataFinished(QList<QOpcUaHistoryData> results, QOpcUa::UaStatusCode serviceResult)
+    signal.
+
+    In the following example, the historic data from the last two days of a node are requested and printed.
+    The result is limited to ten values per node.
+
+    \code
+        QOpcUaHistoryReadResponse *response = node->readHistoryRaw(QDateTime::currentDateTime(),
+                                                                   QDateTime::currentDateTime().addDays(-2),
+                                                                   10,
+                                                                   true);
+        if (response) {
+            QObject::connect(response123, &QOpcUaHistoryReadResponse::readHistoryDataFinished,
+                             [] (QList<QOpcUaHistoryData> results, QOpcUa::UaStatusCode serviceResult) {
+                if (serviceResult != QOpcUa::UaStatusCode::Good) {
+                    qWarning() << "Fetching historical data failed with:" << serviceResult;
+                } else {
+                    for (const auto& result : results) {
+                        qInfo() << "NodeId:" << result.nodeId();
+                        for (const auto &dataValue : result.result())
+                            qInfo() << "Value:" << dataValue.value();
+                    }
+                }
+            });
+        }
+    \endcode
+*/
+QOpcUaHistoryReadResponse *QOpcUaNode::readHistoryRaw(const QDateTime &startTime, const QDateTime &endTime, quint32 numValues, bool returnBounds)
+{
+    Q_D(QOpcUaNode);
+    if (d->m_client.isNull() || d->m_client->state() != QOpcUaClient::Connected)
+        return nullptr;
+
+    return d->m_impl->readHistoryRaw(startTime, endTime, numValues, returnBounds);
+}
+
 QDebug operator<<(QDebug dbg, const QOpcUaNode &node)
 {
     dbg << "QOpcUaNode {"