Thanks. Since the option to replace the battery isn't available in Italy, I think I'll buy the 9a with the store credit. In family we have 6a, 7a and 8a...let's hope the other two last a good while

How long does your battery last?
I have a 6a with the update downloaded but not yet applied. The cycle count is 430.

have a look at this page:
github.com/rabbitmq/rab...

basically you handle authn and authz via some http api.
It is much more flexible than the allow list especially if you do not only have the
broker but also a backend application with users and connected devices

Mosquitto lacks integrations for authz and authn management. Rabbit is more complete in my opinion