NodeOPCUA API Documentation
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    Interface ClientSessionReadService

    interface ClientSessionReadService {
        read(
            nodeToRead: ReadValueIdOptions,
            maxAge?: number,
        ): Promise<DataValue>;
        read(
            nodesToRead: ReadValueIdOptions[],
            maxAge?: number,
        ): Promise<DataValue[]>;
        read(
            nodeToRead: ReadValueIdOptions,
            maxAge: number,
            callback: ResponseCallback<DataValue>,
        ): void;
        read(
            nodesToRead: ReadValueIdOptions[],
            maxAge: number,
            callback: ResponseCallback<DataValue[]>,
        ): void;
        read(
            nodeToRead: ReadValueIdOptions,
            callback: ResponseCallback<DataValue>,
        ): void;
        read(
            nodesToRead: ReadValueIdOptions[],
            callback: ResponseCallback<DataValue[]>,
        ): void;
        readVariableValue(
            nodeId: NodeIdLike | ReadValueIdOptions,
            callback: ResponseCallback<DataValue>,
        ): void;
        readVariableValue(
            nodeId: NodeIdLike | ReadValueIdOptions,
        ): Promise<DataValue>;
        readVariableValue(
            nodeIds: (NodeIdLike | ReadValueIdOptions)[],
            callback: ResponseCallback<DataValue[]>,
        ): void;
        readVariableValue(
            nodeIds: (NodeIdLike | ReadValueIdOptions)[],
        ): Promise<DataValue[]>;
    }

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