Reset an Item Label in rule

OK, I’ve progressed on this, by using the HTTP binding.
I sniffed the url and json payload format for reading and setting the regional configuration data in a rule, but I struggle to find the correct authentication appraoch for this. I’m opening a separate topic on this, since this is slightly off topic from this thread.
Thanks for pointing me in this direction, though.

https://community.openhab.org/t/openhab-3-api-and-http-binding-authentication/141354