Optional Updates & Tools
Before You Update:
- Back up all your work from the SD card
- Ensure your device is 50%+ charged
- Requires a Zerowriter v1.1 or later (if you are in the first batch, that means having performed a manual update via Web Updater once)
- Join our Discord if you need help, or contact me: adam@zerowriter.ink
v1.30 via SD Card Update
LatestReleased: February 12, 2026
Requires: Zerowriter v1.1 or later (you need to see a version number at the bottom of your menu screen in order to perform SD updates)
Download:
⬇️ firmware.binWhat's New:
- Enabled remapping arrow keys via keymap.json
- Bookmark Mode redesigned to look nicer
- Fixed umlauts not working in deadkeys, and improved general deadkey behaviours
- Improved markdown & fountain rendering
- Increased timeout window for Lock Code
What's kind of New (last few revisions):
- Added Dark Mode
- Added loading custom fonts via SD card.
- Added Fountain and Markdown rendering
- Fixed line spacing and font issues
- Added an unlock code to prevent accidental wakes
- Greatly improved editor stability and performance
Installation Instructions
- Download the .bin file above
- Ensure the file is named exactly: firmware.bin
- Copy the file to the root of your SD card (not in a folder)
- Safely eject the SD card from your computer
- Insert the SD card into your Zerowriter Ink
- Power up or restart your Zerowriter Ink
- Wait for the update to complete
- Device will restart automatically
Web Updater Method (Advanced)
Consider this method if the SD card update fails:
- Visit the Web Updater
- Select your device and upload the .bin file
Optional Tools & Utilities
Keymap Editor
Create your own keyboard layout by editing the layers of your keyboard with an online editor.
Download Tool →Font Tool
Convert any .TTF font (fixed width, monospace, like a typewriter) for use with your Zerowriter Ink.
Visit Tool →