2 files changed, 20 insertions, 0 deletions
diff --git a/src/org/traccar/helper/ChannelBufferTools.java b/src/org/traccar/helper/ChannelBufferTools.java
index ef2ebc313..0de07610d 100644
--- a/src/org/traccar/helper/ChannelBufferTools.java
+++ b/src/org/traccar/helper/ChannelBufferTools.java
@@ -17,6 +17,7 @@ package org.traccar.helper;
 
 import java.util.Formatter;
 import org.jboss.netty.buffer.ChannelBuffer;
+import org.traccar.protocol.IntellitracFrameDecoder;
 
 /**
  * ChannelBuffer helper methods
@@ -130,4 +131,17 @@ public class ChannelBufferTools {
         }
         return out;
     }
+
+    /**
+     * Convert hex string to byte array
+     */
+    public static byte[] convertHexString(String in) {
+        int count = in.length() / 2;
+        byte[] out = new byte[count];
+        for (int i = 0; i < count; i++) {
+            out[i] = Integer.valueOf(in.substring(i * 2, (i + 1) * 2), 16).byteValue();
+        }
+        return out;
+    }
+
 }
diff --git a/test/org/traccar/helper/ChannelBufferToolsTest.java b/test/org/traccar/helper/ChannelBufferToolsTest.java
index 792770dab..67c58058b 100644
--- a/test/org/traccar/helper/ChannelBufferToolsTest.java
+++ b/test/org/traccar/helper/ChannelBufferToolsTest.java
@@ -31,4 +31,10 @@ public class ChannelBufferToolsTest {
         result = Long.valueOf(result).toString();
         assertEquals("1903", result);
     }
+
+    @Test
+    public void convertHexStringTest() {
+        assertArrayEquals(ChannelBufferTools.convertHexString("1234"), new byte[] {0x12,0x34});
+    }
+
 }