YAML - Fermer une série de volets 31 mn après le coucher du soleil

Voici le code (matériel utilisé : RFXtrx433E de RFXCOM) :

- alias: Fermeture volets Mezzanine
  trigger:
   - event: sunset
     offset: 00:31:00
     platform: sun
 condition: []
 action:
- data:
  entity_id: cover.mezzanine_volet_1
  service: cover.close_cover
- data:
  entity_id: cover.mezzanine_volet_2
  service: cover.close_cover
- data:
  entity_id: cover.mezzanine_volet_3
  service: cover.close_cover
- data:
  entity_id: cover.mezzanine_volet_4
  service: cover.close_cover