Node-RED block in Snap4City Microservice library node-red-contrib-snap4city-developer is "notificator-last-events">
    <p>It allows to request the last events that have been detected by the notifier. It is possible to choose the interval to
        check for new events.</p>

    <h3>Inputs</h3>
    A JSON with these parameters:

    <dl class="message-properties">
        <dt>dashboard
            <span class="property-type">string</span>
        </dt>
        <dd>The name of the dashboard where the event being notified was created</dd>
        <dt>Widget
            <span class="property-type">string</span>
        </dt>
        <dd>The name of the widget where the event being notified was created</dd>
        <dt>Event
            <span class="property-type">string</span>
        </dt>
        <dd>The name of the event to be observed with this node</dd>
        <dt>Check Every
            <span class="property-type">number</span>
        </dt>
        <dd>Time interval that indicates when the presence of the event is re-checked (indicated in seconds)</dd>
    </dl>

    <h3>Outputs</h3>
    <dl class="message-properties">
        <dd> Returns an array containing the last events that have been detected by the notifier</dd>
    </dl>

    <h3>Details</h3>
    <p>The node can receive a JSON with the parameters described in the Inputs section and with them generate the output JSON.
        If the values are not present in the input JSON, these are read by those in the configuration. If they are not present
        in either part, an error is generated for the necessary parameters.</p>