fix: Send notification to all groups

Author: Stephan van Rooij

README.md

@@ -222,7 +222,7 @@ To play a short music file as a notification send the following payload to `sono
 }
 ```
 
-You can also have a notification play on all speakers, just send the following message to `sonos/cmd/notify`.
+You can also have a notification play on all groups (all devices that coordinate themself), just send the following message to `sonos/cmd/notify`.
 
 ```JSON
 {

src/sonos-to-mqtt.ts

@@ -63,7 +63,10 @@ export class SonosToMqtt {
       this.log.debug('Got generic command {command} from mqtt', command)
       switch (command) {
         case 'notify':
-          return Promise.all(this.sonosManager.Devices.map(d => d.PlayNotification(payload)))
+          return Promise.all(this.sonosManager.Devices
+            .filter(d => d.Coordinator.Uuid === d.Uuid)
+            .map(d => d.PlayNotification(payload))
+          )
         case 'pauseall':
           return Promise.all(this.sonosManager.Devices.map(d => d.Pause()));
         case 'listalarm':