I think that the ESP32 you are referring to is the Makerfabs ESP32 UWB, as it's the only one I'm aware of - if you know of a different module, please let me know.

I’ve been intending to pick up a few of these, I was hesitant as the only sources used to be Tindie and Makerfabs themselves, but I see that RobotShop has them now (although in Canada they are out of stock, with new ones arriving in late November).

So I certainly will accept this suggestion!

😎

Bill

A usable Open Source Local Positioning System would be great! 

An ESP32 with UWB has been available for a while, but it seems to be problematic to implement and calibrate, despite some examples that demonstrate it working well. A clear guide on doing this would be brilliant.

There was a very long thread recently about local positioning using LIDAR and another device I don't recall. It would be interesting to hear how this UWB would fit in unless of course I am completely misunderstanding what your first post is talking about. Most folks first post is the introduction but I see you have garden railway in the UK in your profile so that tells us a bit about you. Welcome!

An ESP32 with UWB has been available for a while, but it seems to be problematic to implement and calibrate, despite some examples that demonstrate it working well. A clear guide on doing this would be brilliant.