Data sources and licenses
License
Section titled “License”m5-grayline is released under the MIT License. Third-party libraries and data are under their own licenses; see THIRD_PARTY_NOTICES.md.
Map data
Section titled “Map data”| Data | Used for | Source and license |
|---|---|---|
| NASA Blue Marble | Photo-style map (day) | NASA, public domain |
| NASA Earth at Night | Photo-style map (night) | NASA, public domain |
| Natural Earth (1:50m land) | Land and sea (twilight zones style) | Natural Earth, public domain |
NASA does not endorse this project.
Firmware libraries
Section titled “Firmware libraries”| Library | License |
|---|---|
| M5Unified | MIT |
| M5GFX | MIT (bundled fonts are under their own licenses) |
| ArduinoJson | MIT |
| Arduino core for the ESP32 | LGPL-2.1 (most bundled ESP-IDF components are Apache-2.0) |
Manual and Web Flasher
Section titled “Manual and Web Flasher”| Software | License |
|---|---|
| Astro / Starlight | MIT |
| ESP Web Tools | Apache-2.0 |
External services
Section titled “External services”| Service | Used for |
|---|---|
| ipinfo.io | Estimating your approximate location (GeoIP), only when home.lat and home.lon are not set. See Configuration (config.json). |
| NTP servers | Time synchronization. Defaults: ntp.nict.jp, time.google.com, pool.ntp.org. |