I got it now 
like this its working for room 8
service: vacuum.send_command
target:
entity_id: vacuum.wischroboter
data:
command: clean_V2
params:
act: start
content:
type: freeClean
value: "1,8"
room 7 and 4
service: vacuum.send_command
target:
entity_id: vacuum.wischroboter
data:
command: clean_V2
params:
act: start
content:
type: freeClean
value: "1,7;1,4"
I created a script to clean all rooms as follows:
alias: Staubsauger Start (alle Zimmer)
sequence:
- target:
entity_id: vacuum.wischroboter
data:
command: clean_V2
params:
act: start
content:
type: freeClean
value: 1,2;1,9;1,8;1,5;1,3;1,7;1,4
action: vacuum.send_command
mode: single
If you only want to clean a specific room, create a script like this:
alias: Staubsauger Start Flur
sequence:
- target:
entity_id: vacuum.wischroboter
data:
command: clean_V2
params:
act: start
content:
type: freeClean
value: 1,5
action: vacuum.send_command
mode: single
description: ""
For the dashboard, you can create buttons for each room to press like this:
type: vertical-stack
cards:
- type: markdown
content: "### Einzelnes Zimmer saugen:"
- type: horizontal-stack
cards:
- type: button
name: Badezimmer
icon: mdi:bathtub
show_name: true
show_icon: true
tap_action:
action: call-service
service: script.staubsauger_start_badezimmer
- type: button
name: WC
icon: mdi:toilet
show_name: true
show_icon: true
tap_action:
action: call-service
service: script.staubsauger_start_wc
- type: button
name: Küche
icon: mdi:fridge
show_name: true
show_icon: true
tap_action:
action: call-service
service: script.staubsauger_start_kuche
- type: button
name: Wohnzimmer
icon: mdi:sofa
show_name: true
show_icon: true
tap_action:
action: call-service
service: script.staubsauger_start_wohnzimmer
Or a main button to clean all:
type: button
name: Alle Zimmer
icon: mdi:robot-vacuum
tap_action:
action: call-service
service: script.staubsauger_start_alle_zimmer
And here is the Stop Script or Return to Base button:
alias: Staubsauger Stop
sequence:
- target:
entity_id: vacuum.wischroboter
data:
command: clean_V2
params:
act: stop
content:
type: freeClean
value: 1,0
action: vacuum.send_command
description: ""
alias: Staubsauger Zurück zur Basis
sequence:
- target:
entity_id: vacuum.wischroboter
action: vacuum.return_to_base
data: {}
description: ""
I hope this method will soon be included in the official Ecovacs Home Assistant integration.