MIHO : Thx, I figured. I understand they problably had battery life issue, but to some extend I would leave the choice to the user.
Default : threshold mode : ie. if TEmp moves by 0.5 or more, wake up.
Forced by user : wake up every x hours, which they had implemented anyway.
Some users may be ready to change the battery every 3 months to get more readings.. User choice.
I imagine (actually I hope) that if the Shelly T&H is supplied with power, I do get readings every 10min ?