visiting "live data" tab causes fatal error on ECU #4271

preparation

java_console/io/src/main/java/com/rusefi/ldmp/StateDictionary.java

@@ -1,6 +1,5 @@
 package com.rusefi.ldmp;
 
-import com.rusefi.OutputChannel;
 import com.rusefi.config.Field;
 import com.rusefi.config.generated.*;
 import com.rusefi.enums.live_data_e;
@@ -50,6 +49,20 @@ public enum StateDictionary {
         }
     }
 
+    static int getSize(Field[] values) {
+        Field last = values[values.length - 1];
+        return last.getOffset() + last.getType().getStorageSize();
+    }
+
+    public int getOffset(live_data_e live_data_e) {
+        int result = 0;
+        for (live_data_e index : live_data_e.values()) {
+            if (index.ordinal() < live_data_e.ordinal())
+                result += getSize(getFields(index));
+        }
+        return result;
+    }
+
     private void register(live_data_e ldsIndex, Field[] values, String fileName) {
         map.put(ldsIndex, values);
         fileNames.put(ldsIndex, fileName);

java_console/io/src/test/java/com/rusefi/ldmp/StateDictionaryTest.java

@@ -1,12 +1,29 @@
 package com.rusefi.ldmp;
 
+import com.rusefi.config.generated.TsOutputs;
 import com.rusefi.enums.live_data_e;
 import org.junit.Test;
 
+import static org.junit.Assert.assertEquals;
+
 public class StateDictionaryTest {
+
+    private static final int OUTPUTS_SIZE = 612;
+
     @Test
     public void testStateDictionaryIsComplete() {
         // we assert that this does not fail
         StateDictionary.INSTANCE.getFields(live_data_e.LDS_ac_control);
     }
+
+    @Test
+    public void testStructSize() {
+        // todo: do we have this struct size anywhere?
+        assertEquals(OUTPUTS_SIZE, StateDictionary.getSize(TsOutputs.VALUES));
+    }
+
+    @Test
+    public void testOffset() {
+        assertEquals(OUTPUTS_SIZE, StateDictionary.INSTANCE.getOffset(live_data_e.LDS_knock_controller));
+    }
 }

java_console/models/src/main/java/com/rusefi/core/SensorCentral.java

@@ -19,14 +19,25 @@ public class SensorCentral implements ISensorCentral {
     private final SensorsHolder sensorsHolder = new SensorsHolder();
 
     private final Map<Sensor, List<SensorListener>> allListeners = new EnumMap<>(Sensor.class);
+    private byte[] response;
 
-    public static ISensorCentral getInstance() {
+    public static SensorCentral getInstance() {
         return INSTANCE;
     }
 
     private SensorCentral() {
     }
 
+    @Override
+    public void grabSensorValues(byte[] response) {
+        this.response = response;
+        ISensorCentral.super.grabSensorValues(response);
+    }
+
+    public byte[] getResponse() {
+        return response;
+    }
+
     @Override
     public double getValue(Sensor sensor) {
         return sensorsHolder.getValue(sensor);