Simple individual allergy index (IAI) chart card with background

Who it’s for

Allergy sufferers, public health managers, and outdoor event organizers ask “how has the allergy index trended recently, and what is the current risk level at a glance?” The simple chart with background combines compact trend visualization with full-card color coding so the current status is visible from a distance.

What it does

A sensor streams IAI_level telemetry and the widget renders a time-series trend chart on a card whose background color reflects the current severity: green for Good (0–2), light green for Moderate (2–6), orange for Elevated (6–9), and red for Hazardous (above 9).

• Full-card background color communicates current allergy risk at a glance from a distance
• Trend chart of the Individual Allergy Index over the selected dashboard time window
• Shows one sensor’s data per widget; add multiple widgets to compare trends and current status 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 background colors — edit the color of each range on the Latest data key.

Tips

• On a public information display, the colored background signals the current allergy risk at a glance while the chart shows whether conditions are improving or deteriorating.
• Use consistent severity colors across all allergy and air quality widgets so users build a single mental model for what each color means across the entire dashboard.
• A 7-day chart showing the seasonal IAI trend helps event organizers plan outdoor activities around predictably lower-risk windows.