Reading freeze after 1sec of artnet inactivity

[Nspada2]

Hi guys, I'm using this repo in an android app I'm developing. I noticed that if artnet stays still for more then 1 sec the reading freeze and need some time to wakeup. Any ideas about how to fix it? I'm using the Server Listener to read any change

Here a video of the problem. https://youtu.be/G5EKXNKhBLs

[cansik]

Hi, thanks for the provided video, would it also be possible to provide a minimal example which shows the problem? Without code it is difficult to help you with that.

[Nspada2]

ArtNetClient artnet=new ArtNetClient();
        artnet.start();
        artnet.getArtNetServer().addListener(
                new ArtNetServerEventAdapter() {
                    @Override public void artNetPacketReceived(ArtNetPacket packet) {
                        dmxData = artnet.readDmxData(0, 0);
                        System.out.println("1:" + Byte.toUnsignedInt(dmxData[0]) + " 2:" + Byte.toUnsignedInt(dmxData[1]));
                        int a,b;
                        a=Byte.toUnsignedInt(dmxData[0])*20/255;
                        b=Byte.toUnsignedInt(dmxData[1])*20/255;
                        binding.textview1.setText("1:" + a + " 2:" + b);
                        binding.progressBar.setProgress(a);
                        binding.progressBar2.setProgress(b);
                    }
                });

[cansik]

Does this behaviour happen only on android or is it possible to reproduce it on a computer as well?

To be honest, I can't find anything special in the code and I don't own an android phone. So it's a bit difficult to test.

[Nspada2]

It's impossible to try that on android studio because of the network adaptor isolated from the host. It never hapens with other software. What I think is that it stops reading as soon as artnet stop transmitting, but, artnet protocol can stay "mute" up to 3 seconds if notthing changes, it only talk when something change or, if not, it sends a confirm that is alive every 3 secs. A workaround I found is to use a channel which I don't use and give it a sinewave, so values are always changing and the connecrion is always mantained.

[cansik]

Afaik there is no mechanism built into artnet4j that would prevent this behaviour (only send every nth second). Maybe android is messing with the sockets. I think I can not really help you with that problem, but I'll let the issue open for others with artnet4j & android experience.

[Nspada2]

No problem, in my app I only use the reciver, but this could be helpful for someone with my preblem. BTW the workaround works fine (if you can control the artnetOut)