Interpreting Charts¶

Learn to read and analyze the temperature and humidity visualizations in GreenCop.

Chart Types¶

Bar Charts¶

Used For: Comparing current readings across multiple sensors

Location: Dashboard main area

How to Read: - Each sensor has two bars side-by-side - Left bar (orange): Current temperature - Right bar (blue): Current humidity - Y-axis: Value (°C or %) - X-axis: Sensor names

Insights: - Quickly identify outlier sensors - Compare environmental conditions across rooms - Spot sensors reporting abnormal values

Line Charts¶

Used For: Viewing trends over time

Locations: Dashboard (historical trends), Sensor Detail Page

How to Read: - X-axis: Time (chronological) - Y-axis: Temperature (°C) or Humidity (%) - Orange line: Temperature progression - Blue line: Humidity progression - Hover for exact values at any point

Insights: - Identify daily cycles - Spot gradual changes - Detect anomalies or sudden spikes - Correlate temperature and humidity

Reading Patterns¶

Normal Temperature Patterns¶

Daily Cycle:

Temp (°C)
30 |     /\
25 |    /  \
20 |___/    \___
   6am  12pm  6pm

- Rises during day (people, activity) - Peaks afternoon (2-4 PM) - Drops overnight - Smooth curves

Stable Environment:

Temp (°C)
25 |____________
   12h   24h   36h

- Flat or minor variation - Indicates good HVAC control - Consistent load

Abnormal Temperature Patterns¶

Cooling Failure:

Temp (°C)
40 |        ___
30 |      /
20 |_____/
   Start  1h  2h

- Sharp upward spike - No recovery - Immediate action needed

Gradual Overheating:

Temp (°C)
35 |         __
30 |      __
25 |   __
20 |__
   1d  2d  3d

- Slow increase over days - Cooling capacity declining - Plan maintenance

Sensor Malfunction:

Temp (°C)
40 |  __  __
30 | |  ||  |
20 ||  ||  ||
   1h 2h 3h

- Erratic readings - Impossible fluctuations - Check sensor hardware

Humidity Patterns¶

Normal Humidity: - Relatively stable (±5%) - Minor daily variations - Gradual changes only

Concerning Humidity: - Sudden spikes (>10% in 1 hour) - Sustained above 60% - Wild fluctuations - Inverse correlation with temp (unusual)

Chart Interactions¶

Hover Tooltips¶

Desktop: 1. Move mouse over chart 2. Tooltip appears with: - Exact timestamp - Temperature value - Humidity value 3. Follows cursor

Mobile: - Tap and hold on data point - Tooltip appears - Release to dismiss

Time Range Selection¶

Sensor Detail Page: - Three buttons: "1 Hour", "24 Hours", "7 Days" - Click to change displayed range - Active button highlighted - Chart re-renders with new data

Effect on Chart: - 1h: Highly detailed, many points - 24h: Moderate detail, daily patterns visible - 7d: Sampled data, weekly trends

Legend Interaction¶

Desktop Charts: - Click legend item (Temperature/Humidity) - Hides/shows that data series - Useful for focusing on one metric - Click again to restore

Comparative Analysis¶

Multiple Sensors¶

On Dashboard: 1. View bar chart 2. Compare heights of bars 3. Identify which sensors are hottest/coolest 4. Investigate outliers

Questions to Ask: - Why is one sensor 5°C hotter? - Are sensors in same room similar? - Is one sensor closer to heat source?

Temperature vs Humidity¶

Look For: - Inverse relationship (temp up, humidity down) - Correlated changes (both rising together) - Independent variation

Typical Patterns: - Temp ↑ Humidity ↓: Normal (hot air holds more moisture) - Both ↑: External humidity source (leak, weather) - Both ↓: Dry, cool conditions

Alert Correlation¶

Chart Context for Alerts¶

When alert triggers: 1. Go to sensor detail page 2. View chart leading up to alert 3. Identify: - Gradual buildup vs sudden spike - Time of day pattern - Related humidity change

Root Cause Analysis¶

Example: Temperature alert at 2 PM

Chart Shows: - Gradual rise since 10 AM - Humidity stable - Previous days had same pattern

Conclusion: Insufficient cooling during peak hours

Action: Increase HVAC capacity or cooling schedule

Performance Indicators¶

Healthy System¶

Charts Show: - Smooth lines (no jagged edges) - Predictable daily cycles - All sensors within 3°C of each other - Humidity 40-50% stable - No alerts

Warning Signs¶

Charts Show: - Increasing baseline over days - One sensor diverging from others - Erratic, noisy data - Humidity climbing - Frequent threshold breaches

Best Practices¶

Regular Review¶

Check dashboard daily
Review sensor detail pages weekly
Compare week-over-week trends
Investigate any changes in patterns

Pattern Recognition¶

Learn your normal baseline
Document expected daily cycles
Note seasonal variations
Set expectations for "normal"

Documentation¶

Screenshot abnormal patterns
Note dates of significant events
Correlate with facility changes
Build historical knowledge base

Troubleshooting Charts¶

Chart Not Loading¶

Symptoms: Blank chart area or loading spinner

Solutions: - Refresh page - Check internet connection - Verify backend API is running - Look for JavaScript errors in console

No Data Points¶

Symptoms: Empty chart with axes

Causes: - Sensor not publishing data - Time range has no readings - BigQuery ingestion issue

Solutions: - Verify sensor is online - Select different time range - Check BigQuery table for data

Choppy/Jagged Lines¶

Normal: Actual sensor variation Abnormal: Chart rendering issue, refresh page