eink

41 Articles

LightInk, A Solar Powered ESP32 Smartwatch

May 5, 2026 by 8 Comments

There’s something about the ESP32 family of microcontrollers and timekeeping. We probably see it in clocks as often as we do anything else; we also probably see more clocks with one as the beating heart than any of the many other possible timekeeping options.

[Daniel Ansorregui]’s LightInk watch is no different in that regard — but it is very different in one important detail, because like any other smartwatch, you won’t have to worry about battery life. Outside of gloomiest Gotham, its built-in solar panel should be able to keep it charged.

That’s for a few reasons. The obvious one is the e-ink display, which only takes a sip of power during updates. That’s hardly unique to [Daniel]’s projec t– he quite explicitly calls out the Watchy project, which we featured previously, as where he got the idea of putting e-ink and an ESP32-PICO together on his wrist. What is unique is the delightful hack [Daniel] is using to minimize power usage, which is our favorite part.

Continue reading “LightInk, A Solar Powered ESP32 Smartwatch” →

E-paper Dashboard Reimagines Smart Home’s Connection With Technology

May 5, 2026 by 11 Comments

When [Joel Hawksley] and his partner got married, they had a goal to create a home with a healthy relationship to technology, which largely means avoiding smartphone use. Smartphones aren’t without their benefits, though, like being clocks and calendars, so [Joel] started looking for other options to replace these capabilities. At first he went with a “magic mirror” solution, but quickly pivoted to a wall-mounted e-paper solution he calls Timeframe which has evolved into a respectable overview for his home and life.

E-paper has a number of advantages over LCD and LED displays, one of which being that its resemblance to real paper makes it feel more organic. The first e-paper iterations of Timeframe used multiple displays in wooden frames, and [Joel] had a few different ones stationed around the house. They received their data from a custom-built Rails backend which sent pictures to the devices. This made the refresh rate possible fairly low, but a new 23.5″ display from Boox eventually enabled an acceptably high resolution and refresh rate which could support more traditional display uses. But this display required that [Joel] rewrite the entire back-end, an effort that took quite a bit of time but resulted in an impressive final product.

Like any custom-built project like this, [Joel] still has plans for improvements including those around further integration with his Home Assistant and reducing costs for future platforms. E-paper displays are popular pieces of technology for home dashboards like this, in the past we’ve seen similar, smaller builds which coincidentally have the same name.

Open-Source eink firmware

Pocket-Sized E-Ink Gets A Firmware Upgrade

April 5, 2026 by 26 Comments

Not so long ago, e-ink devices were rare and fairly pricey. As they have become more common and cheaper, some cool form-factor devices have emerged that suffer from subpar software. [Concretedog] picked up just such a device, and that purchase led to the discovery of a cool open-source firmware project for this tiny gadget.

[Concretedog] described the process of loading the firmware, which is just about as easy a modification as one can make. You plug the e-ink display into your computer, visit a website, and can flash it right from there. Once the display is running the CrossPoint Reader firmware, it unlocks some new tricks on this affordable reader. The firmware lets you turn the device into a WiFi hotspot and upload books wirelessly, or it can connect to an existing network to add files that way. It also enables rotating the display and KOReader syncing if you have multiple devices you read from.

We love seeing the community step in and improve devices that are hardware-wise good, sometimes great, but come up lacking in the software or firmware department. Thanks [Concretedog] for sharing your experience with this device and the cool open-source firmware. Be sure to check out some other projects we’ve featured where a firmware swap breathed new life into the hardware.

Off To The Races With ESP32 And EInk

September 15, 2025 by 16 Comments

Off to the races? Formula One races, that is. This project by [mazur8888] uses an ESP32 to keep track of the sport, and display a “live” dashboard on a 2.9″ tri-color LCD.

“Live” is in scare quotes because updates are fetched only every 30 minutes; letting the ESP32 sleep the rest of the time gives the tiny desk gadget a smaller energy footprint. Usually that’s to increase battery life, but this version of the project does not appear to be battery-powered. Here the data being fetched is about overall team rankings, upcoming races, and during a race the current occupant of the pole-position.

There’s more than just the eInk display running on the ESP32; as with many projects these days, micro-controller is being pressed into service as a web server to host a full dashboard that gives extra information as well as settings and OTA updates. The screen and dev board sit inside a conventional 3D-printed case.

Normally when talking Formula One, we’re looking into the hacks race teams make. This hack might not do anything revolutionary to track the racers, but it does show a nice use for a small e-ink module that isn’t another weather display. The project is open source under a GPL3.0 license with code and STLs available on GitHub.

Thanks to [mazur8888]. If you’ve got something on the go with an e-ink display (or anything else) send your electrophoretic hacks in to our tips line; we’d love to hear from you.

Front and back view of the 13.7" monitor kit

Modos Is Open Hardware, Easy On The Eyes

September 8, 2025 by 25 Comments

Since e-ink first hit the market a couple decades back, there’s always murmurs of “that’d be great as a second monitor”— but very, very few monitors have ever been made. When the commecial world is delivering very few options, it leaves room for open source hardware projects, like the Modos Glider and Paper Monitor, projects now seeking funding on Crowd Supply.

As far as PC monitors go, the Modos isn’t going to win many awards on specs alone. The screen is only 13.3″ across, and its resolution maxes out at 1600 x 1200. The refresh rate would be totally unremarkable for a budget LCD, at 75 Hz. This Paper Monitor isn’t an LCD, budget or otherwise, and for e-ink, 75 Hz is a blazing fast refresh rate. Continue reading “Modos Is Open Hardware, Easy On The Eyes” →

A black and brown planner opened like a laptop. Inside is a greyscale eink phone inside a brown piece of MDF on top, and a black keyboard fills the bottom half.

Foliodeck Squeezes A Writerdeck Into A Planner

July 29, 2024 by 2 Comments

When it comes to writing, sometimes a computer or smartphone is just too distracting to keep on task. [vagabondvivant] found this to be the case and rolled their own distraction-free writing tool, the Foliodeck.

With the increasing availability of parts for cyberdecks, it’s not too surprising to see we’re seeing the emergence of the writerdeck. Typically designed to be a no frills word processing device, they are designed to help their creators focus on writing and not be subject to the myriad notifications present trying to work with a more general computing device or smartphone.

In this case, [vagabondvivant] took a classy looking planner folio and removed its paper management components to leave a fabric and leather shell. The heart of the assembly is a HiSense A5 eink smartphone magnetically attached to a piece of MDF cut to mate the phone to the planner shell. A 10 Ah powerbank slots into the MDF below the keyboard which is also magnetically attached, and the whole thing zips up nicely. Future improvements are planned like a hinge, so it doesn’t have to be propped against something and a custom-built mechanical keyboard.

This isn’t the first writerdeck we’ve seen, and we’ve seen some other writer-focused decks and typewriter replacements.

Continue reading “Foliodeck Squeezes A Writerdeck Into A Planner” →

Home Assistant Display Uses E-Ink

May 20, 2024 by 2 Comments

[Markus] grabbed an ESP32 and created a good-looking e-ink dashboard that can act as a status display for Home Automation. However, the hardware is generic enough that it could work as a weather station or even a task scheduler.

The project makes good use of modules, so there isn’t much to build. A Waveshare 2.9-inch e-ink panel and an ESP32, along with a power supply, are all you need. The real work is in the software. Of course, you also need a box to put it in, but with 3D printing, that’s hardly a problem.

Well, it isn’t a problem unless — like [Markus] — you don’t have a 3D printer. Instead, he built a wooden case that also holds notepaper.

The software uses ESPHome to interface with Home Assistant. There is a fair amount of configuration, but nothing too difficult. Of course, you can customize the display to your heart’s content. Overall, this is a great example of how a few modular components and some open-source software can combine to make a very simple yet useful project.

There are many ways to use an ESP32 in your home automation setup. Maybe you can salvage the e-ink displays. Just try not to get carried away.