Node-RED block in Snap4City Microservice library node-red-contrib-snap4city-user is "bar-series">
    <p>With this node you can add a bar graph to an existing dashboard or a new one created by the node to show bar series graph.
    </p>

    <h3>Configurations</h3>

    <dl class="message-properties">
        <dt>dashboard
            <span class="property-type">string</span>
        </dt>
        <dd>Dashboard title to which the bar graph will be added</dd>
        <dt>widget
            <span class="property-type">string</span>
        </dt>
        <dd> Title that will have the widget containing the bar graph.</dd>
    </dl>

    <h3>Inputs</h3>
    <dl class="message-properties">
        A JSON array like the following:
        <pre>
[
    {
        "metricId": [Service Uri Of A Sensor],
        "metricHighLevelType": "Sensor",
        "metricName": [The name of the Sensor],
        "metricType": [A measure recorded by the sensor]
    },
    {
        "metricId": [The ID of a KPI],
        "metricHighLevelType": "MyKPI",
        "metricName": [The name of the MyKPI],
        "metricType": [The type of the measure saved in the KPI]
    },
    {
        "metricId": "",
        "metricHighLevelType": "Dynamic",
        "metricName": [The name of the dynamic data],
        "metricType": [The type of the dynamic data],
        "metricValueUnit": [The unit of the dynamic data],
        "measuredTime": [The ISO time of the measure of dynamic data],
        "value": [A dynamic value]
    }
]
        </pre>

    <p>You can insert an arbitrary number of MyKPI and Sensor element inside the array.
    An example of the JSON array filled with correct data:</p>

        <pre>
[
    {
        "metricId": "http://www.disit.org/km4city/resource/tusc_weather_sensor_ow_3166540",
        "metricHighLevelType": "Sensor",
        "metricName": "tusc_weather_sensor_ow_3166540",
        "metricType": "airTemperature"
    },
    {
        "metricId": "http://www.disit.org/km4city/resource/tusc_weather_sensor_ow_3182522",
        "metricHighLevelType": "Sensor",
        "metricName": "tusc_weather_sensor_ow_3182522",
        "metricType": "airTemperature"
    },
    {
        "metricId": "17057447",
        "metricHighLevelType": "MyKPI",
        "metricName": "OBD2 - Intake Air Temperature",
        "metricType": "Temperature"
    },
    {
        "metricId": "17056579",
        "metricHighLevelType": "MyKPI",
        "metricName": "OBD2 - Intake Air Temperature",
        "metricType": "Temperature"
    },
    {
        "metricId": "",
        "metricHighLevelType": "Dynamic",
        "metricName": "BatteryGalaxyNote",
        "metricType": "Temperature",
        "metricValueUnit": "°C",
        "measuredTime": "2019-11-21T14:51:00Z",
        "value": 42
    },
    {
        "metricId": "",
        "metricHighLevelType": "Dynamic",
        "metricName": "Storage",
        "metricType": "Space",
        "metricValueUnit": "Gb",
        "measuredTime": "2019-11-21T14:51:00Z",
        "value": 12
    }
]
        </pre>
    </dl>