change send data to dmx as 23 millisecond ticker when new data

driver/artNet.go

@@ -141,9 +141,6 @@ func (d *ArtNetDriver) Connect(ip, id string, port uint) error {
 // send data to all buses that the send flage is true
 func (d *ArtNetDriver) SendData() {
 	for _, bus := range d.Buses {
-		if !bus.Reachable {
-			continue
-		}
-		bus.Send <- bus.Data
+		bus.Send = bus.Reachable
 	}
 }

models/bus.go

@@ -29,7 +29,7 @@ type Bus struct {
 	Resubscribe *[]json_dataModels.Subscription `yaml:"-" json:"resubscribe"`
 	Watchdog    context.CancelFunc              `yaml:"-" json:"-"`
 	Reachable   bool                            `yaml:"-" json:"-"`
-	Send        chan *DMX                       `yaml:"-" json:"-"`
+	Send        bool                            `yaml:"-" json:"-"`
 }
 
 // adds new Art-Net interface to driver port 0 = 6454 (default art-net)
@@ -107,8 +107,6 @@ func (b *Bus) Start(log *logging.Logger) error {
 	var ctx context.Context
 	ctx, b.Watchdog = context.WithCancel(context.Background())
 
-	b.Send = make(chan *DMX, 1024)
-
 	go func() {
 		var interval time.Duration = 10 * time.Second
 		log.Info("bus.Start", fmt.Sprintf("device:%s ip:%s watchdog starting", b.Name, b.Ip))
@@ -129,7 +127,7 @@ func (b *Bus) Start(log *logging.Logger) error {
 				} else {
 					b.Reachable = true
 					// send data as a heartbeat for she ArtNet Protocol
-					b.Send <- b.Data
+					b.Send = true
 					log.Info("bus.Start", fmt.Sprintf("device:%s ip:%s watchdog running", b.Name, b.Ip))
 					interval = 30 * time.Second
 				}
@@ -148,17 +146,26 @@ func (b *Bus) Start(log *logging.Logger) error {
 	}
 
 	go func() {
-		defer conn.Close()
-		//close send channel
-		defer close(b.Send)
+		ticker := time.NewTicker(23 * time.Millisecond)
 
-		for send := range b.Send {
-			_, err = conn.Write(NewArtNetPackage(send))
+		defer func() {
+			b.Send = false
+			conn.Close()
+			ticker.Stop()
+		}()
+
+		for range ticker.C {
+			if !b.Send {
+				continue
+			}
+
+			b.Send = false
+
+			_, err = conn.Write(NewArtNetPackage(b.Data))
 			if err != nil {
 				log.Error("bus.Start", err)
 				return
 			}
-			time.Sleep(23 * time.Millisecond)
 		}
 	}()
 	return nil
@@ -169,8 +176,8 @@ func (b *Bus) Stop() {
 	if b.Watchdog != nil {
 		//cancels context
 		b.Watchdog()
-		//close send channel
-		close(b.Send)
+
+		b.Send = false
 	}
 }