this post was submitted on 14 Jul 2026
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cross-posted from: https://lemmy.world/post/49429587

URL for the crowdfunding: https://www.crowdsupply.com/oddly-specific-objects/open-book-touch

Specs:

  • Display: 4.26" e-paper touchscreen, 480 × 800 px, warm + cool frontlight
  • Processor: ESP32-S3 dual-core, Wi-Fi + Bluetooth LE
  • Memory: 16 MB flash, 8 MB PSRAM
  • Formats: EPUB and plain text, no DRM
  • Storage: microSD card slot
  • Interface: USB-C with integrated LiPo charging
  • Dimension: 78 × 120 × 10 mm, about 85 g
  • Open source: MIT-licensed firmware, open hardware (to be released at shipping)

It also has a replaceable 800 mAh battery, I found it cool :)

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[–] mesamunefire@piefed.social 5 points 1 day ago* (last edited 1 day ago) (1 children)

Very similar to https://diptyx.dev/

But its been around longer. Software looks really good for an esp32. Im hoping we see more of these open source ebook readers pop up.

[–] kkj@lemmy.dbzer0.com 2 points 21 hours ago (1 children)

Ooh, I like the clamshell design. Most people seem to use a flip cover for their eReaders anyway, may as well put a screen in it. 3Ah of battery is also a huge upgrade compared to the OP's 800mAh or the XTEink X4's 650mAh.

[–] mesamunefire@piefed.social 1 points 19 hours ago

Nice, glad you like the design. I do too.

I think in theory it would be easier to repair. But it is 250 which is quite a bit.

Ill know in a couple months!