Simple individual allergy index (IAI) chart card

Who it’s for

Allergy sufferers, public health managers, and outdoor event organizers ask “how has the allergy index at this location trended over the last few hours or days?” They want a compact trend chart that fits into a multi-location overview without the overhead of a full chart card.

What it does

A sensor streams IAI_level telemetry and the widget renders a time-series chart of those readings, color-coded by severity band: green for Good (0–2), light green for Moderate (2–6), orange for Elevated (6–9), and red for Hazardous (above 9). The chart fills the card without a large numerical readout, maximizing the visible time window.

• Trend chart of the Individual Allergy Index over the selected dashboard time window
• Color-coded by severity at each point in time across four bands
• Shows one sensor’s data per widget; add multiple widgets to compare trends across locations

How to set up

Data keys

Key	Role	Type	Description
IAI_level	Chart series	Timeseries	Individual Allergy Index value (unitless); change the key name to match your device’s telemetry key
Latest	Latest value	Timeseries	The headline figure above the chart. Its own color ranges are where the band colors are edited

The widget ships with a simulated function datasource key labeled Air Quality Index, so it draws random values until you point the datasource at a device and rename the key.

To point it at your own device: open the dashboard in edit mode, open the widget’s Datasources, pick the entity or entity alias, and replace the function key with the key your device reports.

Value ranges

Range	Level	Color
0–2	Good	Green
2–6	Moderate	Light Green
6–9	Elevated	Orange
9+	Hazardous	Red

How to customize

• To change the time window — adjust the dashboard time filter to show the last hour, day, or week of IAI readings.
• To change the severity thresholds — edit the color ranges on the Latest data key.
• To change the chart colors — edit the color of each range on the Latest data key.

Tips

• Use this chart in a grid alongside simple chart cards for temperature, humidity, and wind speed to help analysts correlate IAI peaks with the meteorological conditions that drive pollen dispersal.
• A 7-day time window shows seasonal progression and helps health managers identify whether a high-IAI period is a brief spike or a sustained event requiring extended advisories.
• IAI typically peaks in late morning and drops in the afternoon; a 24-hour chart confirms this pattern and helps time public communications for maximum impact.