I have both round (original) and square (Aqara) temp/humidity senor under testing, both using [Release] Xiaomi device drivers by @veeceeoh, version 0.7
As I can see so far, original one only reports if temperature changes 0.5 C or more, or humidity changes 0.5% or more.
Aqara one will report more often, but the disadvantage is battery drained really fast. Mine is dropped to 93% after a week testing.