Hi erik ,
Apologies for the slow response, got sidetracked. I tried the linked library, but had a variety of mismatch problems with the adapted demo I had patched together.
However, once I shoved the existing (GitHub) library into my Arduino installation it basically compiled fine, needed current esp32 core version and some stuff moving around but was simple enough.
So, success, iot75 running standalone and passing tracking data to other esp32 and Android over wi-fi.
Thanks for assistance.