It is possible to control e.g. thermostats and blinds together.

There are a few possible approaches:

Groups

Create a group of thermostats / blinds in Virtual devices, and add slave devices that you want to control with this group.

Each device has autonomy, but when controlled by the group master, they all receive the same command.

Positives:

 possible to assign automatic smart rules directly to group device
 response time is faster compared to Link smart rule approach

Negatives:

 Unable to see real values of grouped slave devices on the master device

Available for: Blind group, Slide group, Electric meters group

Link smart rule

Connect multiple devices with "Link" smart rule. Master and slave devices can be defined.

Positives:

 simple setup, no need for creating extra virtual device
 possible to assign priority when evaluating Link smart rule

Negatives:

 slower response time if evaluation is complex

Available for: Switch, Thermostat, Analog output