1 files changed, 15 insertions, 0 deletions
diff --git a/src/org/traccar/BaseProtocolDecoder.java b/src/org/traccar/BaseProtocolDecoder.java
index cc16000f4..2d6286bf8 100644
--- a/src/org/traccar/BaseProtocolDecoder.java
+++ b/src/org/traccar/BaseProtocolDecoder.java
@@ -19,6 +19,7 @@ import org.jboss.netty.channel.Channel;
 import org.jboss.netty.channel.socket.DatagramChannel;
 import org.jboss.netty.handler.codec.http.HttpRequestDecoder;
 import org.traccar.helper.Log;
+import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Device;
 import org.traccar.model.Position;
 
@@ -66,6 +67,20 @@ public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
         return protocol.getName();
     }
 
+    protected double convertSpeed(double value, String defaultUnits) {
+        switch (Context.getConfig().getString(getProtocolName() + ".speed", defaultUnits)) {
+            case "kmh":
+                return UnitsConverter.knotsFromKph(value);
+            case "mps":
+                return UnitsConverter.knotsFromMps(value);
+            case "mph":
+                return UnitsConverter.knotsFromMph(value);
+            case "kn":
+            default:
+                return value;
+        }
+    }
+
     private DeviceSession channelDeviceSession; // connection-based protocols
     private Map<SocketAddress, DeviceSession> addressDeviceSessions = new HashMap<>(); // connectionless protocols