Thanks. Will update these.
Problem is I need to do fussy search using keywords. And the sellers tries to get as many matches as possible (they add a lot of keywords thats not even describe their product). The ali-database is updated constantly. Gah.
Voilá.
And it maintains a live inventory of clients.
Some points are so difficult to achieve. But I was looking at message identification as a response to the sequence switch problem.
I just stumbled on a module that claims to be accurate to 10cm/4in https://github.com/thotro/arduino-dw1000/wiki
Range is 300m.
https://datasheet.octopart.com/DWM1000-Decawave-datasheet-129251925.pdf#page21
