A small colour e-ink display, 4.37", 480 × 176 px (black, white, red, yellow) with Bluetooth LE and NFC, running our own firmware. The picture stays on the screen with no power; energy is used only when the image changes.
What you can do with it
- Digital photo frame / slideshow: up to 24 pictures, interval from 1 minute to 18 hours; tap a phone (NFC) to move to the next slide.
- Interactive door sign: name, room or flat number, "Do not disturb", "Back at 15:30". Change it from your phone in seconds.
- Electronic name badge for conferences, fairs and work.
- OpenDisplay mode: the tag works as an e-ink screen for home automation (weather, calendar, sensor values, to-do list) with tools that speak the open OpenDisplay protocol (Bluetooth LE). Basic image transfer is supported, no encryption.
How you load pictures
Open our web page in Chrome or Edge (Android or computer), choose a picture, pick the orientation and send it over Bluetooth. No app, no account. The page fits and dithers the picture to the four panel colours. iPhone / Safari do not support Web Bluetooth.
Good to know
- It is e-paper, not an LCD: a refresh takes about 30 seconds and the colours are calm and pastel. Readable in daylight, no backlight.
- Orientation: horizontal or vertical.
- Weight without battery: about 12 g.
- In OpenDisplay mode the tag is always listening on Bluetooth, so it uses more energy than in slideshow mode; for continuous use give it a permanent supply.
- Battery: Optional. The listing includes the badge without a battery
- The tag is a repurposed electronic shelf label (Telink TLSR8258 MCU) reflashed with our firmware; we are not affiliated with its original maker. Tested and working before shipping.
User guide, protocol notes and firmware files: see the documentation link.
Links to code and documentation
Documentation (steanlab.github.io)
Shipping policy
Ships from Poland within 1–3 business days after payment, Monday to Friday. Tracked postal parcel. Delivery to EU countries usually takes 3–10 business days. Tracking number is added to the order when shipped. Please make sure your address is complete. I cannot reship parcels returned for wrong addresses at my cost. For InPost options, please message me your Paczkomat / locker code after placing the order.
