[hau]

Apparently it could be configured to use self-hosted local visionect server.

https://hub.docker.com/r/visionect/visionect-server-v3/

[napsy]

The device in the article is not compatible with Visionect, but Visionect does offer digital signage devices (with even 13", 32" or even 42" e-ink displays). The prices of these devices are a bit premium but you get what you pay for.

Disclaimer: I work for Visionect