diff --git a/plugins/PuckDetection.java b/plugins/PuckDetection.java
new file mode 100644
index 0000000..58b6aaa
--- /dev/null
+++ b/plugins/PuckDetection.java
@@ -0,0 +1,128 @@
+
+import ch.psi.pshell.device.DeviceBase;
+import ch.psi.utils.Arr;
+import ch.psi.utils.State;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.logging.Level;
+
+
+public class PuckDetection extends DeviceBase{
+    public static final int PUCKS_NUMBER = 30;
+    final String server;
+    
+    public PuckDetection(String name, String server){
+        super(name);
+        this.server = server.startsWith("tcp://") ? server : "tcp://" + server;
+    }
+
+    
+    public static class PuckState{
+        boolean online;
+        boolean mecSwitch;
+        boolean indSwitch;
+        
+        void clear(){
+            online = false;
+            mecSwitch = false;
+            indSwitch = false;            
+        }
+        void set(boolean mecSwitch, boolean indSwitch){
+            online = true;
+            this.mecSwitch = mecSwitch;
+            this.indSwitch = indSwitch;            
+        }
+    }
+    
+    PuckState[] pucks;
+    public PuckState[] getPucks(){
+        return pucks;
+    }
+    
+    //From 1 to PUCKS_NUMBER
+    public PuckState getPuck(int id) throws Exception{
+        assertInitialized();
+        if ((id<=0) || (id>PUCKS_NUMBER)){
+            throw new Exception("invalid puck id: "+ id);
+        }
+        return pucks[id-1];
+    }
+    
+    
+    Thread thread;
+    
+    @Override
+    protected void doInitialize() throws IOException, InterruptedException{
+        doClose();
+        super.doInitialize();        
+        pucks = new PuckState[PUCKS_NUMBER];
+        thread = new Thread(new Runnable() {
+            @Override
+            public void run() {
+                subscriberTask();
+            }
+        });
+        thread.setDaemon(true);
+        thread.start();
+    }
+    
+    
+    void subscriberTask(){
+        try{
+            setState(State.Ready);           
+            org.zeromq.ZMQ.Context context = org.zeromq.ZMQ.context(1);
+            org.zeromq.ZMQ.Socket subscriber = context.socket(org.zeromq.ZMQ.SUB);
+            subscriber.connect(server);
+            subscriber.subscribe("Status".getBytes());
+            try{
+                while (!Thread.currentThread().isInterrupted()) {
+                    String type = subscriber.recvStr();
+                    String contents = subscriber.recvStr();
+                    processMessage(contents);
+                }
+            } finally{
+                for (PuckState puck:pucks){
+                    puck.clear();
+                }
+                subscriber.close();
+                context.term();                                        
+            }
+        } catch (Exception ex){    
+            getLogger().log(Level.INFO, null, ex);
+        }
+        setState(State.Offline);
+    }
+    
+    void processMessage(String msg){        
+        ArrayList<Integer> present = new ArrayList<>();
+        for (String line:msg.split("\t")){
+            try{
+                line = line.trim();
+                String[] tokens = line.split(" ");
+                int id = Integer.valueOf(tokens[0].substring(1));
+                present.add(id);
+                PuckState puck = getPuck(id);
+                if (tokens.length<3){
+                    puck.clear();
+                } else {
+                    puck.set(tokens[1].equals("1"),tokens[2].equals("1"));
+                }
+            } catch (Exception ex){
+                getLogger().log(Level.INFO, null, ex);
+            }
+        }
+        for (int i=1; i<= PUCKS_NUMBER; i++){
+            if (!Arr.containsEqual(present.toArray(), i)){
+                pucks[i-1].clear();
+            }
+        }
+    }
+    
+    @Override
+    protected void doClose(){
+        if (thread!=null){
+            thread.interrupt();
+            thread = null;
+        }
+    }
+}