I got myself an ESP32 with an integrated e-ink display. This little project shows when the next bus to the city leaves, and the current time. I get the live bus data from Skyss through the Entur integration in Home Assistant. Might have to get a few more of these to tinker with.
Wow, good tip, I didn't know of that. Sadly, where I live this is still 'in preparation'. But I'll keep looking in case this happens before my cities API! Thank you!