📜 Licensing Strategy

Stand: 25. Oktober 2025
Version: 1.0

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🎯 HYBRID LICENSING MODEL

SolarLog verfolgt einen hybriden Ansatz aus Open Source und Proprietary Software:

• Open Source Core: Transparenz, Community, Trust
• Proprietary Tooling: Revenue, Innovation, Sustainability

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📂 OPEN SOURCE COMPONENTS

License: MIT / Apache 2.0

Backend API (FastAPI)

Repository: github.com/solarlog/backend
License: MIT

Beinhaltet:
✅ REST API Core (FastAPI)
✅ Database Models (SQLAlchemy)
✅ Authentication/Authorization
✅ API Documentation (OpenAPI/Swagger)
❌ KI-Analyse Services (Proprietary!)

Database Schemas

License: MIT

Beinhaltet:
✅ PostgreSQL Schema Definitions
✅ Alembic Migrations
✅ Sample Data / Seed Scripts

Grafana Dashboards

License: Apache 2.0

Beinhaltet:
✅ Dashboard JSON Templates
✅ Panel Configurations
✅ Alert Definitions

MkDocs Documentation

License: CC BY 4.0 (Creative Commons)

Beinhaltet:
✅ Setup Guides
✅ API Reference
✅ Architecture Documentation
❌ Business Strategy (Proprietary!)

ESP32 Source Code

Repository: github.com/solarlog/esp32-firmware
License: Apache 2.0

Beinhaltet:
✅ Arduino/PlatformIO Base Setup
✅ API Client Library (REST/MQTT)
✅ LVGL Integration (Grundgerüst)
✅ Display Drivers (E-Paper/OLED)
✅ WiFi Manager
❌ Provisioning System (Proprietary!)
❌ Pre-built UI Screens (Proprietary!)
❌ OTA Update Service (Proprietary!)

Wichtig: - Source Code = Open Source (Community kann selbst kompilieren) - Compiled Binaries = Proprietary (benötigt Lizenz zum Flashen) - Vergleichbar mit Qt (LGPL vs. Commercial)

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🔒 PROPRIETARY COMPONENTS

Blockchain-Native Tools (Arweave)

ESP32 Flasher Web App

Storage: Arweave Blockchain
License: Proprietary (Commercial Use)
Access: NFT-gated

URL: https://flasher-v1.solarlog.ar
Functionality:
- WebSerial Browser Tool
- Firmware Binary Download (von Arweave)
- License Verification (Solana NFT)
- Credit Management (SmartWeave)
- WiFi Provisioning

Verfügbarkeit: Forever (200+ Jahre)
Kosten: Inkludiert in ESP32 Flash Credit

Pi Image Builder Tool

Storage: Arweave Blockchain
License: Proprietary (Commercial Use)
Access: NFT-gated

URL: https://builder-v1.solarlog.ar
Functionality:
- SD-Card Image Download
- License Verification
- Configuration Wizard
- First-Boot Setup

Verfügbarkeit: Forever (200+ Jahre)
Kosten: Inkludiert in Pi Image Preis (90-149€)

License Verification (SmartWeave Contract)

Blockchain: Arweave
Type: SmartWeave Contract (JavaScript)

Functionality:
- NFT Ownership Verification
- Credit Balance Management
- Device Registration (Anti-Fraud)
- License Expiry Tracking

Open Source: ❌ (Trade Secret)

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Cloud Services (Your Infrastructure)

KI-Analyse Service API

Hosting: AWS/Hetzner (Your Infrastructure)
License: Proprietary (Trade Secret)
Access: Token-based (Stripe Payment)

Endpoints:
- POST /api/v1/analyze-invoice
- POST /api/v1/premium-analysis
- GET  /api/v1/token-balance

Technology:
- FastAPI Microservice
- OpenAI GPT-4 / Claude API
- OCR Service (Tesseract)
- ML Models (Custom)

Open Source: ❌ (Competitive Advantage!)

Firmware Binaries (.bin)

Storage: Arweave (per Version)
License: Proprietary (Commercial Use)

Versionen:
- ESP32_v1.0.bin → TX: abc123...
- ESP32_v1.1.bin → TX: def456...
- ESP32_v2.0.bin → TX: ghi789...

Zugriff: Nur mit gültigem Flash Credit

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⚖️ LICENSE COMPATIBILITY

Third-Party Dependencies

Component	License	Our Usage	Compatibility
Grafana	AGPL v3	Binary Dependency	✅ OK (nicht modifiziert)
PostgreSQL	PostgreSQL License	Binary Dependency	✅ OK (permissive)
FastAPI	MIT	Source Dependency	✅ OK (permissive)
Docker	Apache 2.0	Binary Dependency	✅ OK (permissive)
EVCC	MIT	Binary Dependency	✅ OK (permissive)
LVGL	MIT	Source Dependency	✅ OK (permissive)
React	MIT	Source Dependency	✅ OK (permissive)
Material-UI	MIT	Source Dependency	✅ OK (permissive)

Grafana AGPL Hinweis: - Grafana ist AGPL v3 (Copy-Left!) - Lösung: Grafana NUR als Binary nutzen, NICHT modifizieren - Dashboards (JSON) sind NICHT betroffen (können proprietär sein) - Dokumentation: Grafana Setup Guide bleibt Open Source

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📋 DUAL-LICENSE MODEL (ESP32)

Option A: Open Source (Free)

Repository: github.com/solarlog/esp32-firmware
License: Apache 2.0

User kann:
✅ Source Code herunterladen
✅ Selbst kompilieren (PlatformIO)
✅ Modifizieren nach Belieben
✅ ESP32 selbst flashen (via USB/UART)
✅ Keine Lizenzkosten

Einschränkungen:
❌ Kein WebSerial Flasher Tool (nur Arweave)
❌ Kein WiFi Provisioning System
❌ Keine Pre-built UI Screens (LVGL)
❌ Kein OTA Update Service
❌ Kein Support

Zielgruppe: Maker, Experten, DIY-Community

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Option B: Commercial (Paid)

Access: Arweave Flasher Web App
License: Proprietary Commercial

User erhält:
✅ Fertige Firmware Binary (.bin)
✅ WebSerial Flasher Tool (Browser, einfach!)
✅ WiFi Provisioning (Smartphone-Setup)
✅ Pre-built LVGL UIs (Battery, Inverter, Grid)
✅ OTA Update Service (1 Jahr)
✅ Community Support

Kosten: 10€ pro ESP32 (einmalig)
Zielgruppe: End-User, Installationsfirmen

Vergleichbar mit: - Qt: LGPL (Open Source) vs. Commercial License - MongoDB: SSPL (Open Source) vs. Enterprise - Redis: BSD (Open Source) vs. Redis Ltd. (Enterprise)

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🔐 NFT-BASED LICENSING (Solana)

License Token (NFT)

// Solana NFT Metadata
{
  "name": "SolarLog Pi Image License v1.0",
  "symbol": "SLPI",
  "description": "Lifetime license for SolarLog Raspberry Pi Image",
  "image": "https://arweave.net/license-badge.png",
  "attributes": [
    { "trait_type": "Version", "value": "1.0" },
    { "trait_type": "ESP32 Credits", "value": 5 },
    { "trait_type": "Activated", "value": "2026-01-15" },
    { "trait_type": "Type", "value": "Pi Image" }
  ],
  "properties": {
    "license_key": "SLPI-ABC123-DEF456",
    "arweave_tx": "abc123def456ghi789..."
  }
}

Vorteile: - ✅ Transferable (Wiederverkauf möglich) - ✅ Verifiable (On-Chain Ownership) - ✅ Immutable (Kann nicht gefälscht werden) - ✅ Forever (Blockchain = permanent)

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📜 LICENSE FILES

Root Repository

solarlog/
├── LICENSE (MIT)
├── LICENSE-COMMERCIAL.md
├── CONTRIBUTING.md
├── backend/
│   └── LICENSE (MIT)
├── frontend-web/
│   └── LICENSE (MIT)
├── esp32-firmware/
│   └── LICENSE (Apache 2.0)
├── docs/
│   └── LICENSE (CC BY 4.0)
└── proprietary/
    └── LICENSE (Proprietary - All Rights Reserved)

LICENSE-COMMERCIAL.md

# Commercial License

This software is dual-licensed:

1. Open Source (MIT/Apache 2.0) - See LICENSE file
2. Commercial License - This document

## Proprietary Components

The following components require a commercial license:

- ESP32 Flasher Web App (Arweave)
- Pi Image Builder Tool (Arweave)
- License Verification System (SmartWeave)
- KI-Analyse Services API
- Compiled Firmware Binaries (.bin)

## Purchase License

To purchase a commercial license, visit:
https://solarlog.io/buy

Or contact: licensing@solarlog.io

## Terms

- One-time payment (no subscriptions)
- Lifetime license (per device/installation)
- NFT-based verification (Solana blockchain)
- See full terms: https://solarlog.io/terms

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⚠️ LEGAL DISCLAIMER

Wichtig: - Diese Lizenz-Strategie ist ein Konzept - Vor Implementierung: Anwalt konsultieren! - Besonders wichtig: - GPL/AGPL Compatibility - Dual-Licensing Terms - NFT Legal Status (variiert nach Land) - GDPR/DSGVO Compliance - Commercial Use Terms

Empfohlene Anwaltskanzleien: - Taylor Wessing (Tech/Open Source) - Bird & Bird (IP/Blockchain) - Osborne Clarke (Software Licensing)

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🎯 ZUSAMMENFASSUNG

Component	License	Revenue	Rationale
Backend API	MIT	❌	Transparenz, Community
Database	MIT	❌	Standard, Integration
Grafana Dashboards	Apache 2.0	❌	Templates, Sharing
Documentation	CC BY 4.0	❌	Knowledge Sharing
ESP32 Source	Apache 2.0	❌	Maker-Community
Flasher Tool	Proprietary	✅	Revenue, UX
Pi Builder	Proprietary	✅	Revenue, Convenience
Firmware Binaries	Proprietary	✅	Revenue, Quality
KI-Analyse API	Proprietary	✅	Competitive Moat

Strategie: - Open Source: Vertrauen, Community, Adoption - Proprietary: Revenue, Innovation, Sustainability - Balance: Fair für User, profitabel für Business

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See also: - Revenue Model - Privacy & GDPR - Blockchain Architecture