Which board might fit for my purpose - small, energy-efficient

[ted]

Hi there,

this seem to be the only topic where my question might fit - so here we go:

i am currently tinkering on a diy-eink-tablet - so basically like a "normal" tablet - but instead of a lcd it will have an eink display. There are commercial available ones (remarkable, supernote, viwood, boox etc.) - but none of them is open (theres pinenote - but thats not really usable) and most use android.
I first landed on all the pi-named stuff - and ended up having the "zero-format" - like radxa-zero3w as reference - as it has no bulky connectors like ethernet - which a tablet does not need. Also i had a look at som's - as i had the idea to use a carrier board with a "upgradable" module on top. Then again there does not seem to be a standard connector to the carriers and most carriers also are "fat" with ethernet and USB sideways.

I already have open hardware controllers for display and touchscreen i want to use, same goes for a DC/DC converter.

So long story short - i am looking for a sbc or som that is
- preferably open hardware
- small
- capable to run linux (plan is to run something armbian or alpine/postmarketos with lomiri and software like xjournal+ for handwriting). So it should be possible to have 2GB RAM or more, maybe emmc, maybe possibility to add a SD-Card.

So looking at your boards i am not sure which one might fit. I found some who just used a raspbery and cut of or desoldered "fat" connectors like ethernet - but i'd prefer this as a last resort.

Which of your boards would you recommend for such a case?

[LubOlimex]

I think the only board that fits the open-hardware criteria, 2GB of RAM and being slim is iMX8MP-SOM-4GB-IND. The rest of the SOM designs we have are not open-source hardware The idea of the SOM is to design own bottom board that exposes only the interfaces you need, while the EVB board features most of the peripherals to serve as evaluation basis for the chip, the peripherals and the Linux.

The web-page is here:

https://www.olimex.com/Products/SOM/NXP-iMX8/iMX8MP-SOM-4GB-IND/open-source-hardware