/* * Copyright 2012 Anton Tananaev (anton.tananaev@gmail.com) * * 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 java.nio.charset.Charset; import java.text.ParseException; import java.util.Calendar; import java.util.TimeZone; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.buffer.HeapChannelBufferFactory; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelHandlerContext; import org.traccar.GenericProtocolDecoder; import org.traccar.helper.Crc; import org.traccar.helper.Log; import org.traccar.model.DataManager; import org.traccar.model.Position; /** * Meiligao protocol decoder */ public class MeiligaoProtocolDecoder extends GenericProtocolDecoder { /** * Initialize */ public MeiligaoProtocolDecoder(DataManager dataManager) { super(dataManager); } /** * Regular expressions pattern */ //"155422.000,V,2230.7623,N,11403.4218,E,0.00,0,060211,,*1A|0.0|26|0000|0000,0000|0000000000000000|63|00000000" static private Pattern pattern = Pattern.compile( "(\\d{2})(\\d{2})(\\d{2})\\.(\\d{3})," + // Time (HHMMSS.SSS) "([AV])," + // Validity "(\\d{2})(\\d{2}\\.\\d{4})," + // Latitude (DDMM.MMMM) "([NS])," + "(\\d{3})(\\d{2}\\.\\d{4})," + // Longitude (DDDMM.MMMM) "([EW])," + "(\\d+.\\d+)," + // Speed "(\\d+\\.?\\d*)?," + // Course "(\\d{2})(\\d{2})(\\d{2})," + // Date (DDMMYY) "[^\\|]+\\|(\\d+\\.\\d)\\|" + // Dilution of precision "(\\d+)\\|" + // Altitude "([0-9a-fA-F]+)" + // State ".*"); // TODO: parse ADC /** * Parse device id */ private String getId(ChannelBuffer buf) { String id = ""; for (int i = 0; i < 7; i++) { int b = buf.getUnsignedByte(i); // First digit int d1 = (b & 0xf0) >> 4; if (d1 == 0xf) break; id += d1; // Second digit int d2 = (b & 0x0f); if (d2 == 0xf) break; id += d2; } return id; } /** * Decode message */ protected Object decode( ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { ChannelBuffer buf = (ChannelBuffer) msg; int command = buf.getUnsignedShort(7); // Login confirmation if (command == 0x5000) { ChannelBuffer sendBuf = HeapChannelBufferFactory.getInstance().getBuffer(18); sendBuf.writeByte('@'); sendBuf.writeByte('@'); sendBuf.writeShort(sendBuf.capacity()); byte[] array = new byte[7]; buf.getBytes(0, array); sendBuf.writeBytes(array); sendBuf.writeShort(0x4000); sendBuf.writeByte(0x01); sendBuf.writeShort(Crc.crc16X25Ccitt(sendBuf.toByteBuffer())); sendBuf.writeByte('\r'); sendBuf.writeByte('\n'); if (channel != null) { channel.write(sendBuf); } return null; } // Data offset int offset = 7 + 2; if (command == 0x9955) { offset += 0; } else if (command == 0x9016) { offset += 6; } else if (command == 0x9999) { offset += 1; } else { return null; } // Create new position Position position = new Position(); StringBuilder extendedInfo = new StringBuilder("meiligao"); // Get device by id // TODO: change imei to unique id String id = getId(buf); try { position.setDeviceId(getDataManager().getDeviceByImei(id).getId()); } catch(Exception error) { Log.warning("Unknown device - " + id); return null; } // Parse message String sentence = buf.toString(offset, buf.readableBytes() - offset - 4, Charset.defaultCharset()); Matcher parser = pattern.matcher(sentence); if (!parser.matches()) { throw new ParseException(null, 0); } Integer index = 1; // Time Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); time.clear(); time.set(Calendar.HOUR, Integer.valueOf(parser.group(index++))); time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++))); time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++))); time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++))); // Validity position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false); // Latitude Double latitude = Double.valueOf(parser.group(index++)); latitude += Double.valueOf(parser.group(index++)) / 60; if (parser.group(index++).compareTo("S") == 0) latitude = -latitude; position.setLatitude(latitude); // Longitude Double lonlitude = Double.valueOf(parser.group(index++)); lonlitude += Double.valueOf(parser.group(index++)) / 60; if (parser.group(index++).compareTo("W") == 0) lonlitude = -lonlitude; position.setLongitude(lonlitude); // Speed position.setSpeed(Double.valueOf(parser.group(index++))); // Course String course = parser.group(index++); if (course != null) { position.setCourse(Double.valueOf(course)); } else { position.setCourse(0.0); } // Date time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++))); time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1); time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++))); position.setTime(time.getTime()); // Dilution of precision extendedInfo.append(""); extendedInfo.append(parser.group(index++)); extendedInfo.append(""); // Altitude String altitude = parser.group(index++); if (altitude != null) { position.setAltitude(Double.valueOf(altitude)); } else { position.setAltitude(0.0); } // State extendedInfo.append(""); extendedInfo.append(parser.group(index++)); extendedInfo.append(""); // Extended info position.setExtendedInfo(extendedInfo.toString()); return position; } }