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Just curious but is it the lack of mass production or something sinister like patents / monopoly?
Patents & monopoly
Hey man, this is so cool. I hope it’s okay to plug here: I am working towards releasing a similar product for sale: https://www.invisible-computers.com/ Unfortunately the display isn’t as big as the one you chose and it isn’t battery powered. But I am starting to ship the first units, so there is that :)
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I find the ESP32 much easier to develop for, you don't need to install any toolchains, just plug in and drop code into the virtual USB drive that shows up! I wish all microcontrollers were like that these days.
That sounds like a very specific bootloader that you're using ESP-IDF is still very nice though, and being CMake based makes it easy to integrate outside code It supports serial based uploads, which are still pretty nice with the bundled serial monitor (one key combo to build, upload, and restart) and OTA uploads
The main problem with e-ink is finding a display that doesn't cost 5x what an LCD of the same size would cost. This display was $179 before it became unavailable. That's on the low end for such displays bigger than phone-sized. If the e-ink people ever overcome their cost problem, we'll see many more products.
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There are 31" and 42" e-ink displays available, but they cost a few thousand dollars. The 42" is pretty close to 2ft by 3ft, 25" x 33".
>There are 31" and 42" e-ink displays available, but they cost a few thousand dollars. The 42" is pretty close to 2ft by 3ft, 25" x 33". I must have 4 or 5 old Kindles in a drawer by now, somehow. I wonder if you could hack together a grid of old Kindles to make a giant e-ink screen?
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Patents & monopoly
Apparently, this is not true according to an HN user robinsoh who works in the industry. Check his comment history more info: https://news.ycombinator.com/threads?id=robinsoh
Earlier quoted context omitted.
Patents & monopoly
Apparently, this is not true according to an HN user robinsoh who works in the industry. Check his comment history more info: https://news.ycombinator.com/threads?id=robinsoh
[1] https://www.businesswire.com/news/home/20171220005895/en/E-I...
The main problem with e-ink is finding a display that doesn't cost 5x what an LCD of the same size would cost. This display was $179 before it became unavailable. That's on the low end for such displays bigger than phone-sized. If the e-ink people ever overcome their cost problem, we'll see many more products.
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Cause EInk display code works nice to just ship it an image type file. So, it's gotta be rasterized before, using Chromium makes that super easy - rather than hand crafting PNG. I personally make SVG then rasterize but this isn't that terrible.
I was going down this route once, trying to use Inkscape headless. Is there a SVG-2-bitmap tool you can recommend?