Using alexa echo or flic buttons with tado. control all valves at once.
Echo and flic buttons are physical buttons you press which perform actions you specify in the alexa app.
It can be more intuitive to perform actions in this way rather than using a voice command.
I have posted a question previously as to how one could turn all thermostats off with one command and also resume the schedule and I have now been successful in this.
The first thing to do is to create a GROUP of all your valve thermostats within the alexa app.
When you then create a routine in the alexa app you choose the power toggle option instead of temperature , this has the effect of turning each valve off or resuming the schedule of each radiator dependent on whether you chose power on or off of that group from the routing you created.
Clearly the same result can be achieved by issuing a voice command without physical buttons.
for example, I can say "alexa turn the heating off" the routine that initiates toggles the power off in the group "radiators"
"alexa resume central heating" toggles the power option to ON in the group "radiators" and each valve resumes the temperature it was set to.
Hope this helps.