2 files changed, 20 insertions, 41 deletions

diff --git a/src/main/java/org/traccar/protocol/LaipacProtocolDecoder.java b/src/main/java/org/traccar/protocol/LaipacProtocolDecoder.java
index c028d78b6..381f497e4 100644
--- a/src/main/java/org/traccar/protocol/LaipacProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/LaipacProtocolDecoder.java
@@ -26,8 +26,6 @@ import org.traccar.helper.DateBuilder;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
 import org.traccar.model.CellTower;
-import org.traccar.model.Device;
-import org.traccar.model.Command;
 import org.traccar.model.Network;
 import org.traccar.model.Position;
 
@@ -123,21 +121,6 @@ public class LaipacProtocolDecoder extends BaseProtocolDecoder {
         return event;
     }
 
-    private String getDevicePassword(DeviceSession deviceSession) {
-
-        String devicePassword = DEFAULT_DEVICE_PASSWORD;
-
-        Device device = Context.getIdentityManager().getById(deviceSession.getDeviceId());
-        if (device != null) {
-            String password = device.getString(Command.KEY_DEVICE_PASSWORD);
-            if (password != null) {
-                devicePassword = password;
-            }
-        }
-
-        return devicePassword;
-    }
-
     private void sendEventResponse(
             String event, String devicePassword, Channel channel, SocketAddress remoteAddress) {
 
@@ -247,7 +230,8 @@ public class LaipacProtocolDecoder extends BaseProtocolDecoder {
 
             sendAcknowledge(status, event, checksum, channel, remoteAddress);
 
-            String devicePassword = getDevicePassword(deviceSession);
+            String devicePassword = Context.getIdentityManager()
+                .getDevicePassword(deviceSession.getDeviceId(), DEFAULT_DEVICE_PASSWORD);
             sendEventResponse(event, devicePassword, channel, remoteAddress);
         }
 
@@ -260,18 +244,19 @@ public class LaipacProtocolDecoder extends BaseProtocolDecoder {
 
         String sentence = (String) msg;
 
-        Parser parser = new Parser(PATTERN_ECHK, sentence);
-        if (parser.matches()) {
-            return handleEchk(sentence, parser, channel, remoteAddress);
-        }
-
-        parser = new Parser(PATTERN_AVRMC, sentence);
-        if (parser.matches()) {
-            return handleAvrmc(sentence, parser, channel, remoteAddress);
+        if (sentence.startsWith("$ECHK")) {
+            Parser parser = new Parser(PATTERN_ECHK, sentence);
+            if (parser.matches()) {
+                return handleEchk(sentence, parser, channel, remoteAddress);
+            }
+        } else if (sentence.startsWith("$AVRMC")) {
+            Parser parser = new Parser(PATTERN_AVRMC, sentence);
+            if (parser.matches()) {
+                return handleAvrmc(sentence, parser, channel, remoteAddress);
+            }
         }
 
         return null;
     }
 
-
 }
diff --git a/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java b/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java
index 6f540fa3e..9b99486f7 100644
--- a/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/LaipacProtocolEncoder.java
@@ -21,7 +21,11 @@ import org.traccar.helper.Checksum;
 
 public class LaipacProtocolEncoder extends StringProtocolEncoder {
 
-    public LaipacProtocolEncoder() {
+    @Override
+    protected String formatCommand(Command command, String format, String... keys) {
+        String sentence = super.formatCommand(command, "$" + format, keys);
+        sentence += Checksum.nmea(sentence) + "\r\n";
+        return sentence;
     }
 
     @Override
@@ -29,30 +33,20 @@ public class LaipacProtocolEncoder extends StringProtocolEncoder {
 
         initDevicePassword(command, LaipacProtocolDecoder.DEFAULT_DEVICE_PASSWORD);
 
-        String commandSentence = null;
-
         switch (command.getType()) {
             case Command.TYPE_CUSTOM:
-                commandSentence = formatCommand(command, "${%s}",
+                return formatCommand(command, "{%s}",
                     Command.KEY_DATA);
-                break;
             case Command.TYPE_POSITION_SINGLE:
-                commandSentence = formatCommand(command, "$AVREQ,{%s},1",
+                return formatCommand(command, "AVREQ,{%s},1",
                     Command.KEY_DEVICE_PASSWORD);
-                break;
             case Command.TYPE_REBOOT_DEVICE:
-                commandSentence = formatCommand(command, "$AVRESET,{%s},{%s}",
+                return formatCommand(command, "AVRESET,{%s},{%s}",
                     Command.KEY_UNIQUE_ID, Command.KEY_DEVICE_PASSWORD);
-                break;
             default:
                 break;
         }
 
-        if (commandSentence != null) {
-            commandSentence += Checksum.nmea(commandSentence) + "\r\n";
-            return commandSentence;
-        }
-
         return null;
     }