diff --git a/src/main/java/de/neemann/digital/gui/DigitalRemoteInterface.java b/src/main/java/de/neemann/digital/gui/DigitalRemoteInterface.java
index 0a2a3539d..a8b2f7bda 100644
--- a/src/main/java/de/neemann/digital/gui/DigitalRemoteInterface.java
+++ b/src/main/java/de/neemann/digital/gui/DigitalRemoteInterface.java
@@ -54,4 +54,12 @@ public interface DigitalRemoteInterface {
      * @throws RemoteException RemoteException
      */
     void stop() throws RemoteException;
+
+    /**
+     * Used to obtain the models state
+     *
+     * @return a JSON string containing the measurement values
+     * @throws RemoteException RemoteException
+     */
+    String measure() throws RemoteException;
 }
diff --git a/src/main/java/de/neemann/digital/gui/Main.java b/src/main/java/de/neemann/digital/gui/Main.java
index ae490c243..00b048e28 100644
--- a/src/main/java/de/neemann/digital/gui/Main.java
+++ b/src/main/java/de/neemann/digital/gui/Main.java
@@ -1820,7 +1820,10 @@ public final class Main extends JFrame implements ClosingWindowListener.ConfirmS
     @Override
     public void start(File romHex) {
         SwingUtilities.invokeLater(() -> {
-            runModelState.enter(true, new ProgramMemoryLoader(romHex));
+            ProgramMemoryLoader modelModifier = null;
+            if (romHex != null)
+                modelModifier = new ProgramMemoryLoader(romHex);
+            runModelState.enter(true, modelModifier);
             circuitComponent.graphicHasChanged();
         });
     }
@@ -1885,6 +1888,26 @@ public final class Main extends JFrame implements ClosingWindowListener.ConfirmS
     public void stop() {
         SwingUtilities.invokeLater(this::ensureModelIsStopped);
     }
+
+    @Override
+    public String measure() throws RemoteException {
+        if (model != null) {
+            StringBuilder sb = new StringBuilder("{");
+            ArrayList<Signal> signals = model.getSignalsCopy();
+            boolean first = true;
+            for (Signal s : signals) {
+                if (first)
+                    first = false;
+                else
+                    sb.append(',');
+                sb.append('"').append(s.getName()).append("\":").append(s.getValue().getValue());
+            }
+            sb.append("}");
+            return sb.toString();
+        }
+        throw new RemoteException("no model available");
+    }
+
     //**********************
     // remote interface end
     //**********************
diff --git a/src/main/java/de/neemann/digital/gui/remote/DigitalHandler.java b/src/main/java/de/neemann/digital/gui/remote/DigitalHandler.java
index 41e2b8099..9989f5a5b 100644
--- a/src/main/java/de/neemann/digital/gui/remote/DigitalHandler.java
+++ b/src/main/java/de/neemann/digital/gui/remote/DigitalHandler.java
@@ -63,6 +63,8 @@ public class DigitalHandler implements HandlerInterface {
             case "stop":
                 digitalRemoteInterface.stop();
                 return null;
+            case "measure":
+                return digitalRemoteInterface.measure();
             default:
                 throw new RemoteException(Lang.get("msg_remoteUnknownCommand", command));
         }
diff --git a/src/test/java/de/neemann/digital/integration/TestInGUI.java b/src/test/java/de/neemann/digital/integration/TestInGUI.java
index 5a267412b..378ecbdb8 100644
--- a/src/test/java/de/neemann/digital/integration/TestInGUI.java
+++ b/src/test/java/de/neemann/digital/integration/TestInGUI.java
@@ -27,6 +27,7 @@ import de.neemann.digital.fsm.FSM;
 import de.neemann.digital.fsm.State;
 import de.neemann.digital.fsm.Transition;
 import de.neemann.digital.fsm.gui.FSMFrame;
+import de.neemann.digital.gui.DigitalRemoteInterface;
 import de.neemann.digital.gui.Main;
 import de.neemann.digital.gui.NumberingWizard;
 import de.neemann.digital.gui.Settings;
@@ -41,6 +42,7 @@ import de.neemann.digital.gui.components.terminal.KeyboardDialog;
 import de.neemann.digital.gui.components.terminal.Terminal;
 import de.neemann.digital.gui.components.testing.TestAllDialog;
 import de.neemann.digital.gui.components.testing.ValueTableDialog;
+import de.neemann.digital.gui.remote.RemoteException;
 import de.neemann.digital.lang.Lang;
 import de.neemann.digital.testing.TestCaseDescription;
 import de.neemann.digital.testing.TestCaseElement;
@@ -1089,6 +1091,28 @@ public class TestInGUI extends TestCase {
                 .execute();
     }
 
+    public void testRemoteInterface() throws InterruptedException, RemoteException {
+        Main m = new Main.MainBuilder()
+                .setFileToOpen(new File(Resources.getRoot(), "dig/remoteInterface/measure.dig"))
+                .build();
+
+        SwingUtilities.invokeLater(() -> m.setVisible(true));
+        DigitalRemoteInterface ri = m;
+
+        Thread.sleep(1000);
+        ri.start(null);
+        Thread.sleep(1000);
+        String json = ri.measure();
+        assertEquals("{\"Q\":0,\"C\":0}", json);
+        Thread.sleep(1000);
+        ri.doSingleStep();
+        Thread.sleep(1000);
+        json = ri.measure();
+        assertEquals("{\"Q\":1,\"C\":0}", json);
+        Thread.sleep(1000);
+        ri.stop();
+        m.dispose();
+    }
 
     public static class CheckErrorDialog extends GuiTester.WindowCheck<ErrorMessage.ErrorDialog> {
         private final String[] expected;
diff --git a/src/test/resources/dig/remoteInterface/measure.dig b/src/test/resources/dig/remoteInterface/measure.dig
new file mode 100644
index 000000000..8b99438b7
--- /dev/null
+++ b/src/test/resources/dig/remoteInterface/measure.dig
@@ -0,0 +1,105 @@
+<?xml version="1.0" encoding="utf-8"?>
+<circuit>
+  <version>1</version>
+  <attributes/>
+  <visualElements>
+    <visualElement>
+      <elementName>Out</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>Q</string>
+        </entry>
+      </elementAttributes>
+      <pos x="460" y="140"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Clock</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>C</string>
+        </entry>
+      </elementAttributes>
+      <pos x="340" y="160"/>
+    </visualElement>
+    <visualElement>
+      <elementName>JK_FF</elementName>
+      <elementAttributes/>
+      <pos x="380" y="140"/>
+    </visualElement>
+    <visualElement>
+      <elementName>VDD</elementName>
+      <elementAttributes/>
+      <pos x="360" y="120"/>
+    </visualElement>
+    <visualElement>
+      <elementName>ROM</elementName>
+      <elementAttributes>
+        <entry>
+          <string>isProgramMemory</string>
+          <boolean>true</boolean>
+        </entry>
+      </elementAttributes>
+      <pos x="380" y="240"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Ground</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Bits</string>
+          <int>2</int>
+        </entry>
+      </elementAttributes>
+      <pos x="360" y="260"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Ground</elementName>
+      <elementAttributes/>
+      <pos x="360" y="300"/>
+    </visualElement>
+  </visualElements>
+  <wires>
+    <wire>
+      <p1 x="340" y="160"/>
+      <p2 x="380" y="160"/>
+    </wire>
+    <wire>
+      <p1 x="360" y="240"/>
+      <p2 x="380" y="240"/>
+    </wire>
+    <wire>
+      <p1 x="360" y="180"/>
+      <p2 x="380" y="180"/>
+    </wire>
+    <wire>
+      <p1 x="360" y="280"/>
+      <p2 x="380" y="280"/>
+    </wire>
+    <wire>
+      <p1 x="440" y="140"/>
+      <p2 x="460" y="140"/>
+    </wire>
+    <wire>
+      <p1 x="360" y="140"/>
+      <p2 x="380" y="140"/>
+    </wire>
+    <wire>
+      <p1 x="360" y="120"/>
+      <p2 x="360" y="140"/>
+    </wire>
+    <wire>
+      <p1 x="360" y="240"/>
+      <p2 x="360" y="260"/>
+    </wire>
+    <wire>
+      <p1 x="360" y="280"/>
+      <p2 x="360" y="300"/>
+    </wire>
+    <wire>
+      <p1 x="360" y="140"/>
+      <p2 x="360" y="180"/>
+    </wire>
+  </wires>
+  <measurementOrdering/>
+</circuit>
\ No newline at end of file