Indoor simple humidity chart card with background

Who it’s for

Facility managers, HVAC engineers, and building managers ask “how has humidity trended here recently?” The simple chart with background combines compact trend visualization with a full-card color signal readable from a distance.

What it does

A sensor reporting humidity = 45% renders a time-series trend chart on a card whose background color reflects the current comfort band: orange for Low (0–30%), green for Comfortable (30–60%), and red for High (above 60%).

• Full-card background color communicates comfort status at a glance from a distance
• Trend chart of relative humidity over the selected dashboard time window
• Shows one sensor’s data per widget; add multiple widgets to compare trends and current status across rooms

How to set up

Data keys

Key	Role	Type	Description
humidity	Chart series	Timeseries	Relative humidity in %; 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 Humidity, 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
0–30	Low	Orange
30–60	Comfortable	Green
60+	High	Red

How to customize

• To change the time window — adjust the dashboard time filter to show the last hour, day, or week of humidity readings.
• To change the comfort 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 wall display, the colored background signals the current comfort status from across the room while the embedded chart shows whether humidity is drifting toward a problem band or holding steady.
• Use consistent comfort colors across all indoor environment widgets so facilities staff can interpret a colored background anywhere on the dashboard without reading the label.
• Humidity trends that hold perfectly flat for long periods despite changing occupancy may indicate the sensor has failed or the telemetry pipeline has stalled — a flat line on a live dashboard deserves a sanity check.