Subscribe to configures topics

app/src/model/ConnectionOptions.ts

@@ -29,6 +29,7 @@ export function toMqttConnection(options: ConnectionOptions): MqttOptions | unde
     password: options.password,
     tls: options.encryption,
     certValidation: options.certValidation,
+    subscriptions: options.subscriptions,
   }
 }
 
@@ -46,7 +47,7 @@ export function createEmptyConnection(): ConnectionOptions {
     encryption: false,
     password: undefined,
     username: undefined,
-    subscriptions: ['#', '$SYS'],
+    subscriptions: ['#', '$SYS/#'],
     type: 'mqtt',
     host: '',
     port: 1883,

backend/src/DataSource/MqttSource.ts

@@ -11,13 +11,13 @@ export interface MqttOptions {
   tls: boolean
   certValidation: boolean
   clientId?: string
+  subscriptions: string[]
 }
 
 export class MqttSource implements DataSource<MqttOptions> {
   public stateMachine: DataSourceStateMachine = new DataSourceStateMachine()
   private client: Client | undefined
   private messageCallback?: (topic: string, message: Buffer, packet: any) => void
-  private rootSubscription = '#'
   public topicSeparator = '/'
 
   public onMessage(messageCallback: (topic: string, message: Buffer, packet: any) => void) {
@@ -61,15 +61,12 @@ export class MqttSource implements DataSource<MqttOptions> {
 
     client.on('connect', () => {
       this.stateMachine.setConnected(true)
-      client.subscribe(this.rootSubscription, (err: Error) => {
+      options.subscriptions.forEach((subscription) => {
+        client.subscribe(subscription, (err: Error) => {
           if (err) {
             this.stateMachine.setError(err)
           }
         })
-      client.subscribe('$SYS/#', (err: Error) => {
-        if (err) {
-          console.error('failed to subscribe to sys topic', err)
-        }
       })
     })