Dashboard Modules Breakdown:

1. **Header Module** (modules/header.php)
  * Purpose: Main title and global controls
  * Contains:
    * Dashboard title "Power Monitoring Dashboard"
    * Subtitle "Real-time energy consumption analysis"
    * "Full Refresh" button (resets everything to defaults)

2. **Smart Filter Module** (in index.php)
  * Purpose: Controls data display and time range
  * Contains:
    * Display Option Dropdown: Hourly/Daily/Weekly/Monthly/Yearly
    * Dynamic Reference Selector: Changes based on display option
    * Load Data Button: Applies current filter settings
    * Filter Description: Explains what each option shows

3. **Current Stats Module** (modules/current_stats.php)
  * Purpose: Real-time snapshot of current power metrics
  * Contains 6 data cards:
    * Voltage (V) - Current electrical potential
    * Current (A) - Electrical current flow
    * Power (W) - Instantaneous power consumption
    * Energy Used (kWh) - Total energy consumed (adjusted for base energy)
    * Frequency (Hz) - AC power frequency
    * Power Factor (%) - Efficiency of power usage

4. **Power Consumption Chart Module** (modules/power_chart.php)
  * Purpose: Visualize power usage over time
  * Features:
    * Line chart showing power (W) over selected time period
    * Responsive design with hover details
    * Updates based on selected display option

5. **Energy Consumption Chart Module** (modules/energy_chart.php)
  * Purpose: Visualize cumulative energy consumption
  * Features:
    * Line chart showing energy used (kWh) over time
    * Shows the actual energy consumed (adjusted for PZEM004T's starting value)
    * Complementary to the power chart

6. **Summary Tabs Module** (modules/summary_tabs.php)
  * Purpose: Detailed breakdown of energy usage patterns
  * Contains two tabs:
    * Daily Summary Tab: Table showing energy usage by day
    * Hourly Summary Tab: Table showing energy usage by hour
    * Each table shows:
      * Date/Hour
      * Energy Used (kWh)
      * Average Power (W)
      * Peak Power (W)

7. **Summary Stats Module** (modules/summary_stats.php)
  * Purpose: Overview statistics for the selected period
  * Contains key metrics:
    * Total Energy Used
    * Average Power
    * Peak Power
    * Average Voltage
    * Average Current
    * Average Frequency
    * Average Power Factor