Recliner wrote:
The TfL API is public, and other apps use it. But I get the impression here
that the API is accessed from a program running on the company's server,
with the boards communicating with that. This has the advantage of being
able to handle changes to the API, but obviously depends on the company
continuing to run its server, and updating its software as required.

They are using an ESP8266, which is a small, relatively
underpowered WiFi microcontroller. They say it's talking to the company
server rather than handling the full API.

There are open about that, and describe how to reflash the microcontroller
with alternative firmware if you so desire. There are other popular ESP8266
firmwares out there and it probably wouldn't take a lot to adapt to
refashion to an alternative server if the first one became unavailable.

Theo