nelissuh

Same issue here. SMC in Ariston/ATAG webportal, but not the option to use SMC (or M²s) is not possible to select.  

I also use an ATAG One Zone, and it works without any issue. 

Checked, and confirmed! Thanks.

I would also love to reduce the std. step from 1 to 0,5 °C

Why Is this a bug? The integration has been working fine with ATAG Zone for a long time (ever?).