Granularity of temperartures in HA (from Nest thermostat)

I have a Nest thermostat integrated in HA. It does work but it appears that the polling rate cannot keep up? it is to slow. Look at this pic:
At some times you see that it jumps with 01 (a tenth) of a degree an at other (most) time it jumps up and down with 0.5 (5 tenth) of a degree.
How can I solve this?

Adrie de Regt

You can’t. That’s the way it works. Meaning when the thermo reports is decided by google firmware and cloud. The larger problem that you may eventually encounter is setpoint do not always get delivered to the device. I see a 0.7% failure rate - so have implemented retries.