Open-Source Resources and Roadmap

Updated: August 7, 2026

ZECTRIX / Zectrix Lab follows a staged open-development strategy. Firmware, drivers, interfaces, and printable enclosure resources that are ready for third-party development are published through public pages, while production firmware, cloud operations, and manufacturing materials are organized and released according to maturity. The links below are the current entry points. The license attached to each repository or model page defines its actual permitted use.

1. Resources Currently Available

Resource Scope Status Access License
NOTE4C four-color firmware source NOTE4C · 400 × 300 four-color display Public, under active organization GitHub MIT License; retain the original copyright and license notice
NOTE4 e-paper reference demo NOTE4 · 400 × 300 black-and-white display Public and independently buildable GitHub MIT License · Zectrix Lab
Open API and device interfaces Devices running official firmware Public API documentation Subject to the API documentation and service terms
AI Voice Sticky Note printable enclosure Current public enclosure and print profile Published on MakerWorld MakerWorld model page MakerWorld Standard Digital File License; not a software open-source license

1.1 NOTE4C Four-Color Firmware Source

  • Maintained entry point: itopinion/youn-ink-fourcolor-firmware
  • Default branch: 2bp
  • Targets an ESP32-S3 with a 4.2-inch, 400 × 300 black/white/red/yellow e-paper display.
  • The current public scope includes device firmware source, e-paper drivers, and related development documentation. The repository is still being organized and synchronized; use its actual tree, branches, and README as the source of truth.
  • The project uses the MIT License and retains the original macheng2017 copyright notice. It originates from LazyYoun/youn-ink-fourcolor-firmware.

Model warning: NOTE4C firmware must not be flashed to a black-and-white NOTE4. Before building or flashing, verify the model, flash capacity, partition table, and write offset, and back up the original 16 MiB flash. Public source code is not the complete delivery package for ZECTRIX commercial cloud services or production firmware.

1.2 NOTE4 E-Paper Reference Demo

  • Repository: itopinion/zectrix-note4-epd-demo
  • Default branch: main
  • A standalone ESP-IDF 5.4+ reference project that does not depend on the commercial NOTE4 firmware or LVGL.
  • Publishes the components/zectrix_epd display driver, NOTE4 board adapters, demo UI, hardware self-tests, asset tools, and integration documentation.
  • Demonstrates 400 × 300 full 1bpp refresh, partial 1bpp refresh, full 4bpp / 16-level grayscale refresh, plus audio, Wi-Fi, RTC, charging, battery, LED, button, and NFC tests.
  • Released by Zectrix Lab under the MIT License. See THIRD_PARTY_NOTICES.md in the repository for third-party font and component licenses.

Scope: This is a hardware capability demo and driver reference for the black-and-white NOTE4. It is not the complete NOTE4 consumer firmware or cloud service, and it is not compatible with NOTE4C. Flashing replaces the firmware currently on the device; make a backup first.

1.3 AI Voice Sticky Note Printable Enclosure

  • Publisher: Zectrix Lab
  • Model page: AI Voice Sticky Note
  • The page provides the current enclosure model and a designer print profile that can be opened in Bambu Studio. Use the MakerWorld page as the source of truth for print settings and file revisions.
  • The page currently uses the MakerWorld Standard Digital File License. It permits use under the page license but does not permit unauthorized sharing, sublicensing, sale, rental, hosting, transfer, or redistribution of the digital files, printed objects, or derivatives, and does not permit fee-based use without authorization.

License warning: Although the enclosure is publicly listed and has an access entry point, it is not open source under a conventional license such as MIT, GPL, or CERN-OHL. A firmware license does not automatically cover the enclosure files. Obtain separate written permission from Zectrix Lab before mass production, sale, republication, or creation of distributed derivatives.

1.4 Open API and Interface Documentation

The public documentation covers device discovery, screen-content delivery, to-do management, and related interfaces. Developers can use these interfaces to build desktop clients, automation scripts, content-delivery plugins, and third-party services.

Never commit API keys, device identifiers, or service credentials to a public repository. Technical access to an interface does not automatically grant commercial display or redistribution rights for third-party data.

1.5 Hardware References Available on Request

Schematic PDFs, assembly references, and batch-specific materials may be requested from official support for qualified development needs. These references do not mean that a production BOM, supply-chain information, editable PCB project, or manufacturing authorization has been released.

2. Not Currently Public or Not Part of the Open-Source Delivery

  • The complete NOTE4 consumer firmware, official enhanced features, and commercial cloud-service source
  • Production cloud configuration, keys, signing material, device credentials, and operations tooling
  • Production BOM, supply-chain information, and factory test or calibration materials
  • Editable PCB projects, complete manufacturing files, and batch-specific production materials
  • Internal files not explicitly published in a repository, the Wiki, or the MakerWorld page

These boundaries protect device security, user data, and reliable delivery. A public demo, API, or download page should not be interpreted as default authorization for the materials above.

3. Roadmap

Phase 1 · Released and Under Active Maintenance

  • Publish the NOTE4C four-color firmware source entry point
  • Publish the standalone NOTE4 EPD driver and hardware reference demo
  • Publish Open API documentation and community project indexes
  • Publish the current AI Voice Sticky Note printable enclosure entry point

Phase 2 · Repository Governance and Reproducible Releases

  • Finalize official ownership, naming, upstream synchronization, and maintainer permissions for the NOTE4C repository
  • Complete reproducible build instructions, version tags, release firmware, file sizes, and SHA-256 checksums
  • Establish Issue, Pull Request, code-review, and community-contribution workflows
  • Expand NOTE4 / NOTE4C board-driver examples, test documentation, and compatibility notes

Phase 3 · Hardware Ecosystem Collaboration

  • Evaluate releasing editable PCB design files and a selected BOM after ownership, manufacturing, and support boundaries are clear
  • Evaluate versioned enclosure design sources with clearer licensing terms
  • Establish an official ecosystem collaboration, compatibility-validation, and community-project certification process

The roadmap describes the current direction; it is not a fixed release schedule or a promise that every internal resource will be published. Actual releases may change according to hardware revisions, security risks, third-party licenses, and maintenance capacity.

4. How to Participate

  • Firmware issues and code contributions: open an Issue or Pull Request in the relevant GitHub repository
  • Open API integrations: follow the API documentation and remove all credentials and device-private data before publishing
  • Enclosure derivatives, mass production, or sales: confirm permission through an official channel first
  • Community project listing: provide the repository, compatible model, license, build method, and verified result materials

Thank you to every developer contributing to the ZECTRIX / Zectrix Lab ecosystem.