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diff --git a/src/main/java/org/traccar/protocol/WialonProtocolDecoder.java b/src/main/java/org/traccar/protocol/WialonProtocolDecoder.java
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+++ b/src/main/java/org/traccar/protocol/WialonProtocolDecoder.java
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+/*
+ * 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.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class WialonProtocolDecoder extends BaseProtocolDecoder {
+
+ public WialonProtocolDecoder(Protocol protocol) {
+ super(protocol);
+ }
+
+ private static final Pattern PATTERN = new PatternBuilder()
+ .number("(dd)(dd)(dd);") // date (ddmmyy)
+ .number("(dd)(dd)(dd);") // time (hhmmss)
+ .number("(dd)(dd.d+);") // latitude
+ .expression("([NS]);")
+ .number("(ddd)(dd.d+);") // longitude
+ .expression("([EW]);")
+ .number("(d+.?d*)?;") // speed
+ .number("(d+.?d*)?;") // course
+ .number("(?:NA|(-?d+.?d*));") // altitude
+ .number("(?:NA|(d+))") // satellites
+ .groupBegin().text(";")
+ .number("(?:NA|(d+.?d*));") // hdop
+ .number("(?:NA|(d+));") // inputs
+ .number("(?:NA|(d+));") // outputs
+ .expression("(?:NA|([^;]*));") // adc
+ .expression("(?:NA|([^;]*));") // ibutton
+ .expression("(?:NA|(.*))") // params
+ .groupEnd("?")
+ .compile();
+
+ private void sendResponse(Channel channel, SocketAddress remoteAddress, String prefix, Integer number) {
+ if (channel != null) {
+ StringBuilder response = new StringBuilder(prefix);
+ if (number != null) {
+ response.append(number);
+ }
+ response.append("\r\n");
+ channel.writeAndFlush(new NetworkMessage(response.toString(), remoteAddress));
+ }
+ }
+
+ private Position decodePosition(Channel channel, SocketAddress remoteAddress, String substring) {
+
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+ if (deviceSession == null) {
+ return null;
+ }
+
+ Parser parser = new Parser(PATTERN, substring);
+ if (!parser.matches()) {
+ return null;
+ }
+
+ Position position = new Position(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+ position.setLatitude(parser.nextCoordinate());
+ position.setLongitude(parser.nextCoordinate());
+ position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+ position.setCourse(parser.nextDouble(0));
+ position.setAltitude(parser.nextDouble(0));
+
+ if (parser.hasNext()) {
+ int satellites = parser.nextInt(0);
+ position.setValid(satellites >= 3);
+ position.set(Position.KEY_SATELLITES, satellites);
+ }
+
+ position.set(Position.KEY_HDOP, parser.nextDouble());
+ position.set(Position.KEY_INPUT, parser.next());
+ position.set(Position.KEY_OUTPUT, parser.next());
+
+ if (parser.hasNext()) {
+ String[] values = parser.next().split(",");
+ for (int i = 0; i < values.length; i++) {
+ position.set(Position.PREFIX_ADC + (i + 1), values[i]);
+ }
+ }
+
+ position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+ if (parser.hasNext()) {
+ String[] values = parser.next().split(",");
+ for (String param : values) {
+ Matcher paramParser = Pattern.compile("(.*):[1-3]:(.*)").matcher(param);
+ if (paramParser.matches()) {
+ try {
+ position.set(paramParser.group(1).toLowerCase(), Double.parseDouble(paramParser.group(2)));
+ } catch (NumberFormatException e) {
+ position.set(paramParser.group(1).toLowerCase(), paramParser.group(2));
+ }
+ }
+ }
+ }
+
+ return position;
+ }
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ String sentence = (String) msg;
+
+ if (sentence.startsWith("#L#")) {
+
+ String[] values = sentence.substring(3).split(";");
+
+ String imei = values[0].indexOf('.') >= 0 ? values[1] : values[0];
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+ if (deviceSession != null) {
+ sendResponse(channel, remoteAddress, "#AL#", 1);
+ }
+
+ } else if (sentence.startsWith("#P#")) {
+
+ sendResponse(channel, remoteAddress, "#AP#", null); // heartbeat
+
+ } else if (sentence.startsWith("#SD#") || sentence.startsWith("#D#")) {
+
+ Position position = decodePosition(
+ channel, remoteAddress, sentence.substring(sentence.indexOf('#', 1) + 1));
+
+ if (position != null) {
+ sendResponse(channel, remoteAddress, "#AD#", 1);
+ return position;
+ }
+
+ } else if (sentence.startsWith("#B#")) {
+
+ String[] messages = sentence.substring(sentence.indexOf('#', 1) + 1).split("\\|");
+ List<Position> positions = new LinkedList<>();
+
+ for (String message : messages) {
+ Position position = decodePosition(channel, remoteAddress, message);
+ if (position != null) {
+ position.set(Position.KEY_ARCHIVE, true);
+ positions.add(position);
+ }
+ }
+
+ sendResponse(channel, remoteAddress, "#AB#", messages.length);
+ if (!positions.isEmpty()) {
+ return positions;
+ }
+
+ } else if (sentence.startsWith("#M#")) {
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+ if (deviceSession != null) {
+ Position position = new Position(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+ getLastLocation(position, new Date());
+ position.setValid(false);
+ position.set(Position.KEY_RESULT, sentence.substring(sentence.indexOf('#', 1) + 1));
+ sendResponse(channel, remoteAddress, "#AM#", 1);
+ return position;
+ }
+ }
+
+ return null;
+ }
+
+}