Thank you, @markgillioz! I will try this. Even though I think the hypothetical power with remarkable integration is to synchronize the note-taking over different devices. That is why I think we should keep pushing Remarkable to make a proper integration. You can all contact them about this here: https://support.remarkable.com/s/contactsupport/wishes-and-ideas and demand this.
Just added my voice on reMarkable's wish list with a request to make Zotero integration possible. There is such potential for this – loved all their tablets and the rM Pro is an even more attractive reading device for pdfs. To sync pdfs & epubs easily to and from the device with proper highlighting and annotations showing up in Zotero would be such a treat. Zotero citizen since the FF Plugin days and very happy with what it does.
It is possible to connect your remarkable 2 to Zotero. I've done it with the koreader app (https://koreader.rocks/) and then using the zotero koreader plugin (https://github.com/stelzch/zotero.koplugin). IIRC I had to first downgrade my remarkable version so I could get totlec (https://toltec-dev.org/) and then I could get koreader and then the plugin. It's a bit involved, but definitely possible, and koreader works nicely with 2 column pdfs on remarkable where the text is too small at full size. I was doing a file clear out at the time, but you would probably need to make sure you have a backup of your remarkable files before you start, but I think most of the tutorials that I followed explained those steps. Now I can't use the straight lines and shapes in the more recent versions of the remarkable software because I had to downgrade, but I think the tradeoff is worth it.
The solution that I have proposed above is still valid, but the dependencies and user interface have changed a little bit, so I created a GitHub repo for the workflow:
An update on the "way back", since that was the open question the last time this thread moved.
I make Tagged Sync, an Obsidian plugin that syncs a reMarkable into an Obsidian vault. Since version 1.8.0 it talks to Zotero: you send a PDF from your Zotero library to the tablet (one paper from a search, or every paper you tagged in Zotero, each by a command in Obsidian), you mark it up on the tablet, and after the sync the note in Obsidian knows which paper it is and links back to the Zotero item. That part is free. The paid part (Tagged Sync Pro, 14-day trial) writes what you marked on the tablet into the Zotero item as native highlights, underlines and comments, with the colours you used. It works over zotero.org or over the Zotero 10 desktop app.
What it does not do, so nobody is surprised: no collection mirror (send is per paper), PDF attachments only (no EPUB), handwritten margin notes arrive as transcribed text in a comment, not as ink. It needs Obsidian; if you do not use Obsidian, this is not for you.
Upgrade Storage
IIRC I had to first downgrade my remarkable version so I could get totlec (https://toltec-dev.org/) and then I could get koreader and then the plugin.
It's a bit involved, but definitely possible, and koreader works nicely with 2 column pdfs on remarkable where the text is too small at full size.
I was doing a file clear out at the time, but you would probably need to make sure you have a backup of your remarkable files before you start, but I think most of the tutorials that I followed explained those steps.
Now I can't use the straight lines and shapes in the more recent versions of the remarkable software because I had to downgrade, but I think the tradeoff is worth it.
https://github.com/gillioz/zotero2remarkable
I will do my best to keep it updated.
I make Tagged Sync, an Obsidian plugin that syncs a reMarkable into an Obsidian vault. Since version 1.8.0 it talks to Zotero: you send a PDF from your Zotero library to the tablet (one paper from a search, or every paper you tagged in Zotero, each by a command in Obsidian), you mark it up on the tablet, and after the sync the note in Obsidian knows which paper it is and links back to the Zotero item. That part is free. The paid part (Tagged Sync Pro, 14-day trial) writes what you marked on the tablet into the Zotero item as native highlights, underlines and comments, with the colours you used. It works over zotero.org or over the Zotero 10 desktop app.
What it does not do, so nobody is surprised: no collection mirror (send is per paper), PDF attachments only (no EPUB), handwritten margin notes arrive as transcribed text in a comment, not as ink. It needs Obsidian; if you do not use Obsidian, this is not for you.
Step-by-step, with screenshots: https://taggedsync.com/blog/zotero-remarkable-integration
Happy to answer questions here.