Nur zur Vollständigkeit, war zu schnell, hab jetzt mal s2m neugestartet, es gibt mit dem Template jetzt 2 Readings.
defmod MQTT2_mqttjs_b2916b6c MQTT2_DEVICE mqttjs_b2916b6c
attr MQTT2_mqttjs_b2916b6c IODev MQTT2_Server
attr MQTT2_mqttjs_b2916b6c bridgeRegexp sonos/(RINCON_[A-Za-z0-9._]*)[/]?.*:.* "$1"
attr MQTT2_mqttjs_b2916b6c readingList sonos/connected:.* connected\
homeassistant/music_player/RINCON_([0-9A-Z]+)/sonos/config:.* { $TOPIC =~ m,(RINCON_[0-9A-Z]+),;; { "config_$1"=>$EVENT }}\
sonos/status/[^/]+/avtransport:.* {}\
sonos/status/[^/]+/renderingcontrol:.* {}
attr MQTT2_mqttjs_b2916b6c room MQTT2_DEVICE
setstate MQTT2_mqttjs_b2916b6c 2020-06-02 16:42:08 config_RINCON_000E58F7F67C01400 {"available_commands":["adv-command","command","joingroup","leavegroup","mute","next","notify","pause","play","playmode","previous","queue","seek","selecttrack","setavtransporturi","sleep","speak","stop","switchtoline","switchtoqueue","switchtotv","toggle","unmute","volume","volumedown","volumeup"],"command_topic":"sonos/RINCON_000E58F7F67C01400/control","device":{"identifiers":["RINCON_000E58F7F67C01400"],"manufacturer":"Sonos","name":"Wohnzimmer"},"device_class":"speaker","icon":"mdi:speaker","json_attributes":true,"json_attributes_topic":"sonos/RINCON_000E58F7F67C01400","name":"Wohnzimmer","state_topic":"sonos/RINCON_000E58F7F67C01400","unique_id":"sonos2mqtt_RINCON_000E58F7F67C01400_speaker","availability_topic":"sonos/connected","payload_available":"2"}
setstate MQTT2_mqttjs_b2916b6c 2020-06-02 16:42:08 connected 2