---
phase: 1
plan: 1
name: Foundation & Kiosk UI
subsystem: Web UI / Backend
tags: [flask, socketio, dashboard, settings, calibration, kiosk]
dependency_graph:
  requires: []
  provides: [api, dashboard, settings, calibration]
  affects: [Phase 2, Phase 3, Phase 4]
tech_stack:
  added: [Flask, Flask-SocketIO, Bootstrap 5.3, Socket.IO Client]
  patterns: [Real-time updates via WebSocket, RESTful API, Touch-optimized UI]
key_files:
  created:
    - src/app.py (Flask backend with SocketIO)
    - src/templates/dashboard.html (Main kiosk dashboard)
    - src/templates/settings.html (Configuration UI)
    - src/templates/calibration.html (Calibration view)
    - requirements.txt (Python dependencies)
    - .planning/phases/01-foundation-kiosk-ui/01-PLAN.md
  modified: []
decisions:
  - Flask + SocketIO for real-time updates on resource-constrained Pi Zero 2 W
  - Bootstrap 5.3 with custom CSS for 7" 1024x600 touchscreen optimization
  - 64px touch targets for primary navigation, 48px minimum elsewhere
  - Mock sensor data service (easily replaceable with hardware integration)
metrics:
  duration: <1 hour
  completed: 2026-03-12
  tasks_completed: 12
  files_created: 6
---

# Phase 1 Plan: Foundation & Kiosk UI Summary

## One-Liner

Flask + SocketIO backend with real-time 7" touchscreen dashboard, settings, and calibration UI for rainfall station RTU

## Objective Achieved

Successfully built the foundational Flask backend with real-time sensor data API and the 7" touchscreen kiosk UI (port 8080) displaying rainfall readings, voltage status, date/time, station ID, communication status, and software version. Included Settings and Calibration menus for configuration access.

## Completed Requirements

### Dashboard (DASH-01 through DASH-09)
- [x] DASH-01: Display rainfall readings (Today, Hourly, MAR, Yearly)
- [x] DASH-02: Display solar voltage
- [x] DASH-03: Display battery voltage with status indicator (HIGH/NORMAL/LOW)
- [x] DASH-04: Display current date and time (HH:MM:SS DD-MM-YYYY)
- [x] DASH-05: Display station ID
- [x] DASH-06: Display communication status (signal strength, connection)
- [x] DASH-07: Display software version
- [x] DASH-08: Real-time updates via Socket.IO (1-second interval)
- [x] DASH-09: Last updated timestamp indicator

### User Interface (UI-01 through UI-03)
- [x] UI-01: Touch-optimized interface for 7" 1024x600 display
- [x] UI-02: Large touch targets (minimum 48px, primary 64px)
- [x] UI-03: Main menu navigation (Dashboard, Settings, Calibration)

### Settings (SETT-01 through SETT-08)
- [x] SETT-01: Station Info display and edit
- [x] SETT-02: Date/Time setting (timezone, NTP)
- [x] SETT-03: Mobile network settings view/edit
- [x] SETT-04: ADC channel configuration (4 channels, types: 4-20mA, 0-10vDC)
- [x] SETT-05: Rainfall sensor settings (ID, thresholds)
- [x] SETT-06: Water level threshold settings
- [x] SETT-07: EVAP settings
- [x] SETT-08: Network settings (IP, subnet, gateway, DNS, MAC)

### Calibration (CAL-01 through CAL-04)
- [x] CAL-01: View live ADC readings (4 channels)
- [x] CAL-02: View current sensor readings with units
- [x] CAL-03: Reset rainfall counters
- [x] CAL-04: Display channel type, ADC value, datum, reading

### Backend (BACK-01 through BACK-03)
- [x] BACK-01: Flask backend running on port 8080
- [x] BACK-02: Sensor data API endpoints (/api/sensors, /api/status)
- [x] BACK-03: Settings API (read/write) (/api/settings)

## Implementation Details

### Architecture
- **Web Layer**: Flask templates serving 1024x600 optimized HTML
- **API Layer**: RESTful endpoints + Socket.IO for real-time push
- **Service Layer**: SensorService (mock data), ConfigService (JSON persistence)

### API Endpoints
| Endpoint | Method | Description |
|----------|--------|-------------|
| /api/status | GET | Station ID, datetime, version, connection |
| /api/sensors | GET | Rainfall, voltage readings |
| /api/settings | GET/POST | All configuration |
| /api/calibration | GET | Live ADC readings |
| /api/calibration/reset_rainfall | POST | Reset counters |

### Real-Time Updates
- Socket.IO connection established on page load
- Server emits `sensor_update` event every 1 second
- Dashboard auto-updates without page refresh

## Deviations from Plan

None - plan executed exactly as written.

## Auth Gates

None encountered.

## Notes for Future Phases

1. **Phase 2**: Add CSV logging with buffered writes to avoid SD card wear
2. **Phase 3**: Implement FTP/SFTP transmission to myvscada server
3. **Phase 4**: Add port 9090 with authentication for remote HD access
4. **Hardware Integration**: Replace mock sensor data with actual GPIO/ADC reads

## Self-Check: PASSED

- [x] src/app.py exists and runs on port 8080
- [x] /api/status returns valid JSON
- [x] /api/sensors returns rainfall and voltage data
- [x] /api/settings supports GET/POST
- [x] /api/calibration returns ADC data
- [x] Dashboard renders with touch-optimized UI
- [x] Settings page allows configuration changes
- [x] Calibration page shows live readings and reset button
- [x] Socket.IO connects and pushes updates
- [x] All 27 Phase 1 requirements implemented