reduce Hue2 'update storms'..

internal/drivers/hue2/bridge.go

@@ -45,7 +45,7 @@ func (b *Bridge) Run(ctx context.Context, eventCh chan<- models.Event) error {
 	if err != nil {
 		return err
 	}
-	log.Println(fmt.Sprintf("[Bridge %d]", b.externalID), "Updated", updated, "hue services at startup.")
+	log.Println(fmt.Sprintf("[Bridge %d]", b.externalID), "Updated", updated, "hue services (startup)")
 
 	lightRefreshTimer := time.NewTicker(time.Second * 5)
 	defer lightRefreshTimer.Stop()
@@ -222,7 +222,7 @@ func (b *Bridge) Update(devices ...models.Device) {
 }
 
 func (b *Bridge) MakeCongruent(ctx context.Context) (int, error) {
-	// Eat all event if there's a pending update.
+	// Exhaust the channel to avoid more updates.
 	exhausted := false
 	for !exhausted {
 		select {
@@ -294,14 +294,26 @@ func (b *Bridge) MakeCongruent(ctx context.Context) (int, error) {
 			}
 		}
 	}
+
+	if len(updates) > 0 {
+		// Optimistically apply the updates to the states, so that the driver assumes they are set until
+		// proven otherwise by the SSE client.
+		newResources := make(map[string]*ResourceData, len(b.resources))
+		for key, value := range b.resources {
+			newResources[key] = value
+		}
+		for key, update := range updates {
+			id := strings.SplitN(key, "/", 2)[1]
+			newResources[id] = newResources[id].WithUpdate(update)
+		}
+		b.resources = newResources
+	}
 	b.mu.Unlock()
 
 	if len(updates) == 0 {
 		return 0, nil
 	}
 
-	log.Println(fmt.Sprintf("[Bridge %d]", b.externalID), "Updating", len(updates), "hue services...")
-
 	eg, ctx := errgroup.WithContext(ctx)
 	for key := range updates {
 		update := updates[key]
@@ -315,23 +327,10 @@ func (b *Bridge) MakeCongruent(ctx context.Context) (int, error) {
 
 	err := eg.Wait()
 	if err != nil {
-		return len(updates), err
-	}
+		// Try to restore light states.
+		_ = b.Refresh(ctx, "light")
 
-	if len(updates) > 0 {
-		// Optimistically apply the updates to the states, so that the driver assumes they are set until
-		// proven otherwise by the SSE client.
-		b.mu.Lock()
-		newResources := make(map[string]*ResourceData, len(b.resources))
-		for key, value := range b.resources {
-			newResources[key] = value
-		}
-		for key, update := range updates {
-			id := strings.SplitN(key, "/", 2)[1]
-			newResources[id] = newResources[id].WithUpdate(update)
-		}
-		b.resources = newResources
-		b.mu.Unlock()
+		return len(updates), err
 	}
 
 	return len(updates), nil

internal/drivers/hue2/data.go

@@ -102,6 +102,12 @@ func (res *ResourceData) WithUpdate(update ResourceUpdate) *ResourceData {
 		cp := *resCopy.Color
 		resCopy.Color = &cp
 		resCopy.Color.XY = *update.ColorXY
+
+		if resCopy.ColorTemperature != nil {
+			cp := *resCopy.ColorTemperature
+			resCopy.ColorTemperature = &cp
+			resCopy.ColorTemperature.Mirek = nil
+		}
 	}
 	if update.Mirek != nil {
 		cp := *resCopy.ColorTemperature