Node-RED block in Snap4City Microservice library node-red-contrib-snap4city-user is "synoptic-read">
    <p>Shows in output the current value of the Synoptic Variable chosen</p>

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

    <dl class="message-properties">
        <dt>synopticId
            <span class="property-type">string</span>
        </dt>
        <dd>the id of the Synoptic to be read</dd>
        <dt>synopticVariableId
            <span class="property-type">string</span>
        </dt>
        <dd>the id of the Synoptic Variable to be read</dd>

        <p>An example of the JSON array filled with correct data:</p>
    <pre>
{
    "synopticId": 17849,
    "synopticVariableId": "s4csvg_name"
}
    </pre>
    or
    <pre>
{
    "synopticId": 17849,
    "synopticVariableId": "12345"
}
</pre>

    <h3>Outputs</h3>
    <dl class="message-properties">
        <dd> Value of Synoptic Variable that has been readed</dd>
    </dl>