NOTE4 16-Level Grayscale Demo
Explore full refresh, partial refresh and sixteen grayscale levels on monochrome NOTE4 as a display foundation for your own e-paper projects.
USB firmware
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Device firmware · NOTE4C · Four-color
NOTE4C Devkit × Tesserae
Connect the four-colour NOTE4C to Tesserae for photos, weather, to-dos and widget dashboards. Supports Local REST, Cloud and Relay, fetching images over Wi-Fi on a schedule, skipping unchanged images and sleeping between checks. Reviewed version: 1.2.1.
What it can do
Connect the four-colour NOTE4C to Tesserae for photos, weather, to-dos and widget dashboards. Supports Local REST, Cloud and Relay, fetching images over Wi-Fi on a schedule, skipping unchanged images and sleeping between checks. Reviewed version: 1.2.1.
Photos and widgets from a self-hosted Tesserae server, Cloud or Relay
Phone-friendly Wi-Fi and service setup, scheduled wake-up and unchanged-image detection
Front button for wake/refresh; lower side button sends right; upper side button is unused
Native, 5-second and 10-second refresh modes; faster modes may reduce colour saturation
Install & use
Let AI help you install
Connect the device and give AI the detection results together with this firmware information.
1
Confirm the device and connect USB
USB chip information cannot distinguish monochrome from four-color screens. Confirm the model first.
Connect USB and detect the device
Read the chip and capacity first, so AI needs fewer follow-up questions.
Detection may restart the device into download mode. It does not flash firmware; you still need to confirm the display model.
Not detected yet. You can also copy the task first and ask AI to help connect.
2
Give the installation task to AI
Codex on your computer can install dependencies and run programs locally.
What AI will do next
Check compatibility → Prepare firmware and a full backup → Assist with local installation → Verify first run
After copying, start a new chat in Codex on your computer and paste the task.
See the task for AI
Only project information and the device details selected here are included. Network addresses, accounts and keys are configured locally during installation.
3
After installation, check this
The device shows the expected NOTE4C Devkit × Tesserae image and repeated updates work.
Ask AI to report the installation location, verification results and how to start again. Continue in the same conversation if something goes wrong.
Know the process? View manual steps and source
Four-colour NOTE4C Devkit only · 2.4 GHz Wi-Fi · Tesserae service · Desktop Chrome / Edge · USB-C data cable
Confirm the model and save a backup
For the ESP32-S3 NOTE4C Devkit with 16 MB flash, 8 MB PSRAM and a 400×300 four-colour panel only, not monochrome NOTE4. Follow FLASHING.md to save and verify your own full-flash backup. Keep it private because it may contain network credentials.
Use the author’s web installer
Open https://note4ctesserae.pages.dev in desktop Chrome or Edge, check the version and connect with a USB-C data cable. Fresh install clears settings; Update preserves settings on compatible installations. The website does not back up automatically. Keep USB connected while writing.
Set up Wi-Fi and Tesserae from your phone
After a fresh install, join the displayed Note4c-Setup-XXXX network and follow the guide to http://192.168.4.1. Enter your Wi-Fi and Local REST, Cloud or Relay pairing details. Self-hosted servers need Note4c support; select ZecTrix NOTE4C Devkit and Nominal BWRY, then assign an image or lineup.
Source, release and installer entry reviewed · Device flashing not tested. Generating the task does not send it or run installation.
Frequently asked questions
Is this a local plugin for the official firmware?
No. It replaces the device firmware and needs a Tesserae service. Local REST is its connection to Tesserae, not the official NOTE4 local-push SDK or a Zectrix Cloud Open API plugin.
Must I self-host a server?
Version 1.2.1 supports Local REST, Tesserae Cloud and Relay. Use a self-hosted server with Note4c support or configure Cloud/Relay according to the author’s guide. You supply the corresponding services and accounts.
Are wireless updates, Bluetooth or MQTT supported?
The current documentation says MQTT, Bluetooth and Wi-Fi firmware updates are not implemented. Install and update by USB web installer or manual flashing; the device does not stay continuously connected during deep sleep.
What do the preview and checks cover?
The image is the author’s weather-widget preview, not our device photograph. Source, the 1.2.1 release, installer entry and deployment guide were reviewed. No device was flashed and battery life was not tested. The project uses AGPL-3.0-or-later; third-party licenses remain applicable.
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