1 files changed, 116 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/YwtProtocolDecoder.java b/src/main/java/org/traccar/protocol/YwtProtocolDecoder.java
new file mode 100644
index 000000000..bf5a23fa7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/YwtProtocolDecoder.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class YwtProtocolDecoder extends BaseProtocolDecoder {
+
+    public YwtProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("%(..),")                // type
+            .number("(d+):")                     // unit identifier
+            .number("d+,")                       // subtype
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([EW])")
+            .number("(ddd.d{6}),")               // longitude
+            .expression("([NS])")
+            .number("(dd.d{6}),")                // latitude
+            .number("(d+)?,")                    // altitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // satellite
+            .expression("([^,]+),")              // report identifier
+            .expression("([-0-9a-fA-F]+)")       // status
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        // Synchronization
+        if (sentence.startsWith("%SN") && channel != null) {
+            int start = sentence.indexOf(':');
+            int end = start;
+            for (int i = 0; i < 4; i++) {
+                end = sentence.indexOf(',', end + 1);
+            }
+            if (end == -1) {
+                end = sentence.length();
+            }
+
+            channel.writeAndFlush(new NetworkMessage("%AT+SN=" + sentence.substring(start, end), remoteAddress));
+            return null;
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        String type = parser.next();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
+
+        int satellites = parser.nextInt();
+        position.setValid(satellites != 0);
+        position.set(Position.KEY_SATELLITES, satellites);
+
+        String reportId = parser.next();
+
+        position.set(Position.KEY_STATUS, parser.next());
+
+        // Send response
+        if ((type.equals("KP") || type.equals("EP")) && channel != null) {
+            channel.writeAndFlush(new NetworkMessage("%AT+" + type + "=" + reportId + "\r\n", remoteAddress));
+        }
+
+        return position;
+    }
+
+}