Example usage for io.netty.buffer ByteBuf readUnsignedShortLE

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf readUnsignedShortLE.

Prototype

public abstract int readUnsignedShortLE();

Source Link

Document

Gets an unsigned 16-bit short integer at the current readerIndex in the Little Endian Byte Order and increases the readerIndex by 2 in this buffer.

Usage

From source file:org.traccar.protocol.GalileoProtocolDecoder.java

License:Apache License

private void decodeTag(Position position, ByteBuf buf, int tag) {
    if (tag >= 0x50 && tag <= 0x57) {
        position.set(Position.PREFIX_ADC + (tag - 0x50), buf.readUnsignedShortLE());
    } else if (tag >= 0x60 && tag <= 0x62) {
        position.set("fuel" + (tag - 0x60), buf.readUnsignedShortLE());
    } else if (tag >= 0xa0 && tag <= 0xaf) {
        position.set("can8BitR" + (tag - 0xa0 + 15), buf.readUnsignedByte());
    } else if (tag >= 0xb0 && tag <= 0xb9) {
        position.set("can16BitR" + (tag - 0xb0 + 5), buf.readUnsignedShortLE());
    } else if (tag >= 0xc4 && tag <= 0xd2) {
        position.set("can8BitR" + (tag - 0xc4), buf.readUnsignedByte());
    } else if (tag >= 0xd6 && tag <= 0xda) {
        position.set("can16BitR" + (tag - 0xd6), buf.readUnsignedShortLE());
    } else if (tag >= 0xdb && tag <= 0xdf) {
        position.set("can32BitR" + (tag - 0xdb), buf.readUnsignedIntLE());
    } else if (tag >= 0xe2 && tag <= 0xe9) {
        position.set("userData" + (tag - 0xe2), buf.readUnsignedIntLE());
    } else if (tag >= 0xf0 && tag <= 0xf9) {
        position.set("can32BitR" + (tag - 0xf0 + 5), buf.readUnsignedIntLE());
    } else {/*  ww  w .  j  ava  2s. c o m*/
        decodeTagOther(position, buf, tag);
    }
}

---

From source file:org.traccar.protocol.GalileoProtocolDecoder.java

License:Apache License

private void decodeTagOther(Position position, ByteBuf buf, int tag) {
    switch (tag) {
    case 0x01:/*from w  ww . ja  v a 2s . c o m*/
        position.set(Position.KEY_VERSION_HW, buf.readUnsignedByte());
        break;
    case 0x02:
        position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
        break;
    case 0x04:
        position.set("deviceId", buf.readUnsignedShortLE());
        break;
    case 0x10:
        position.set(Position.KEY_INDEX, buf.readUnsignedShortLE());
        break;
    case 0x20:
        position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
        break;
    case 0x33:
        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE() * 0.1));
        position.setCourse(buf.readUnsignedShortLE() * 0.1);
        break;
    case 0x34:
        position.setAltitude(buf.readShortLE());
        break;
    case 0x35:
        position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
        break;
    case 0x40:
        position.set(Position.KEY_STATUS, buf.readUnsignedShortLE());
        break;
    case 0x41:
        position.set(Position.KEY_POWER, buf.readUnsignedShortLE() / 1000.0);
        break;
    case 0x42:
        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() / 1000.0);
        break;
    case 0x43:
        position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
        break;
    case 0x44:
        position.set(Position.KEY_ACCELERATION, buf.readUnsignedIntLE());
        break;
    case 0x45:
        position.set(Position.KEY_OUTPUT, buf.readUnsignedShortLE());
        break;
    case 0x46:
        position.set(Position.KEY_INPUT, buf.readUnsignedShortLE());
        break;
    case 0x48:
        position.set("statusExtended", buf.readUnsignedShortLE());
        break;
    case 0x58:
        position.set("rs2320", buf.readUnsignedShortLE());
        break;
    case 0x59:
        position.set("rs2321", buf.readUnsignedShortLE());
        break;
    case 0x90:
        position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(buf.readUnsignedIntLE()));
        break;
    case 0xc0:
        position.set("fuelTotal", buf.readUnsignedIntLE() * 0.5);
        break;
    case 0xc1:
        position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
        position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte() - 40);
        position.set(Position.KEY_RPM, buf.readUnsignedShortLE() * 0.125);
        break;
    case 0xc2:
        position.set("canB0", buf.readUnsignedIntLE());
        break;
    case 0xc3:
        position.set("canB1", buf.readUnsignedIntLE());
        break;
    case 0xd4:
        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
        break;
    case 0xe0:
        position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
        break;
    case 0xe1:
        position.set(Position.KEY_RESULT,
                buf.readSlice(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII));
        break;
    case 0xea:
        position.set("userDataArray", ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte())));
        position.set("userDataArray", ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte())));
        break;
    default:
        buf.skipBytes(getTagLength(tag));
        break;
    }
}

---

From source file:org.traccar.protocol.GalileoProtocolDecoder.java

License:Apache License

private Object decodePositions(Channel channel, SocketAddress remoteAddress, ByteBuf buf) throws Exception {

    int length = (buf.readUnsignedShortLE() & 0x7fff) + 3;

    List<Position> positions = new LinkedList<>();
    Set<Integer> tags = new HashSet<>();
    boolean hasLocation = false;

    DeviceSession deviceSession = null;//  w ww  . j  a  va 2  s .  c  o  m
    Position position = new Position(getProtocolName());

    while (buf.readerIndex() < length) {

        int tag = buf.readUnsignedByte();
        if (tags.contains(tag)) {
            if (hasLocation && position.getFixTime() != null) {
                positions.add(position);
            }
            tags.clear();
            hasLocation = false;
            position = new Position(getProtocolName()); // new position starts
        }
        tags.add(tag);

        if (tag == 0x03) {
            deviceSession = getDeviceSession(channel, remoteAddress,
                    buf.readSlice(15).toString(StandardCharsets.US_ASCII));
        } else if (tag == 0x30) {
            hasLocation = true;
            position.setValid((buf.readUnsignedByte() & 0xf0) == 0x00);
            position.setLatitude(buf.readIntLE() / 1000000.0);
            position.setLongitude(buf.readIntLE() / 1000000.0);
        } else {
            decodeTag(position, buf, tag);
        }

    }

    if (deviceSession == null) {
        deviceSession = getDeviceSession(channel, remoteAddress);
        if (deviceSession == null) {
            return null;
        }
    }

    if (hasLocation && position.getFixTime() != null) {
        positions.add(position);
    } else if (position.getAttributes().containsKey(Position.KEY_RESULT)) {
        position.setDeviceId(deviceSession.getDeviceId());
        getLastLocation(position, null);
        positions.add(position);
    }

    sendReply(channel, 0x02, buf.readUnsignedShortLE());

    for (Position p : positions) {
        p.setDeviceId(deviceSession.getDeviceId());
    }

    return positions.isEmpty() ? null : positions;
}

---

From source file:org.traccar.protocol.GalileoProtocolDecoder.java

License:Apache License

private Object decodePhoto(Channel channel, SocketAddress remoteAddress, ByteBuf buf) throws Exception {

    int length = buf.readUnsignedShortLE();

    Position position = null;/*from w w w .j a  v a 2 s.co  m*/

    if (length > 1) {

        if (photo == null) {
            photo = Unpooled.buffer();
        }

        buf.readUnsignedByte(); // part number
        photo.writeBytes(buf, length - 1);

    } else {

        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
        String uniqueId = Context.getIdentityManager().getById(deviceSession.getDeviceId()).getUniqueId();

        position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        getLastLocation(position, null);

        position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));
        photo.release();
        photo = null;

    }

    sendReply(channel, 0x07, buf.readUnsignedShortLE());

    return position;
}

---

From source file:org.traccar.protocol.Gps103ProtocolDecoder.java

License:Apache License

private Position decodePhoto(Channel channel, SocketAddress remoteAddress, String sentence) {

    String imei = sentence.substring(5, 5 + 15);
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }//from  w ww.  ja  va 2  s .c  om

    ByteBuf buf = Unpooled.wrappedBuffer(DataConverter.parseHex(
            sentence.substring(24, sentence.endsWith(";") ? sentence.length() - 1 : sentence.length())));
    int index = buf.readUnsignedShortLE();
    photo.writeBytes(buf, buf.readerIndex() + 2, buf.readableBytes() - 4);

    if (index + 1 >= photoPackets) {
        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        getLastLocation(position, null);

        try {
            position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(imei, photo, "jpg"));
        } finally {
            photoPackets = 0;
            photo.release();
            photo = null;
        }

        return position;
    } else {
        return null;
    }
}

---

From source file:org.traccar.protocol.GranitProtocolDecoder.java

License:Apache License

private void decodeStructure(ByteBuf buf, Position position) {
    short flags = buf.readUnsignedByte();
    position.setValid(BitUtil.check(flags, 7));
    if (BitUtil.check(flags, 1)) {
        position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
    }//from  w w  w  . j av a  2s.c  o m

    short satDel = buf.readUnsignedByte();
    position.set(Position.KEY_SATELLITES, BitUtil.from(satDel, 4));

    int pdop = BitUtil.to(satDel, 4);
    position.set(Position.KEY_PDOP, pdop);

    int lonDegrees = buf.readUnsignedByte();
    int latDegrees = buf.readUnsignedByte();
    int lonMinutes = buf.readUnsignedShortLE();
    int latMinutes = buf.readUnsignedShortLE();

    double latitude = latDegrees + latMinutes / 60000.0;
    double longitude = lonDegrees + lonMinutes / 60000.0;

    if (position.getValid()) {
        if (!BitUtil.check(flags, 4)) {
            latitude = -latitude;
        }
        if (!BitUtil.check(flags, 5)) {
            longitude = -longitude;
        }
    }

    position.setLongitude(longitude);
    position.setLatitude(latitude);

    position.setSpeed(buf.readUnsignedByte());

    int course = buf.readUnsignedByte();
    if (BitUtil.check(flags, 6)) {
        course = course | 0x100;
    }
    position.setCourse(course);

    position.set(Position.KEY_DISTANCE, buf.readShortLE());

    int analogIn1 = buf.readUnsignedByte();
    int analogIn2 = buf.readUnsignedByte();
    int analogIn3 = buf.readUnsignedByte();
    int analogIn4 = buf.readUnsignedByte();

    int analogInHi = buf.readUnsignedByte();

    analogIn1 = analogInHi << 8 & 0x300 | analogIn1;
    analogIn2 = analogInHi << 6 & 0x300 | analogIn2;
    analogIn3 = analogInHi << 4 & 0x300 | analogIn3;
    analogIn4 = analogInHi << 2 & 0x300 | analogIn4;

    position.set(Position.PREFIX_ADC + 1, analogIn1 * adc1Ratio);
    position.set(Position.PREFIX_ADC + 2, analogIn2 * adc2Ratio);
    position.set(Position.PREFIX_ADC + 3, analogIn3 * adc3Ratio);
    position.set(Position.PREFIX_ADC + 4, analogIn4 * adc4Ratio);

    position.setAltitude(buf.readUnsignedByte() * 10);

    int output = buf.readUnsignedByte();
    for (int i = 0; i < 8; i++) {
        position.set(Position.PREFIX_IO + (i + 1), BitUtil.check(output, i));
    }
    buf.readUnsignedByte(); // status message buffer
}

---

From source file:org.traccar.protocol.GranitProtocolDecoder.java

License:Apache License

@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

    ByteBuf buf = (ByteBuf) msg;

    int indexTilde = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '~');

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);

    if (deviceSession != null && indexTilde == -1) {
        String bufString = buf.toString(StandardCharsets.US_ASCII);
        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        position.setTime(new Date());
        getLastLocation(position, new Date());
        position.setValid(false);/*from   ww  w  . j av a  2s. c  om*/
        position.set(Position.KEY_RESULT, bufString);
        return position;
    }

    if (buf.readableBytes() < HEADER_LENGTH) {
        return null;
    }
    String header = buf.readSlice(HEADER_LENGTH).toString(StandardCharsets.US_ASCII);

    if (header.equals("+RRCB~")) {

        buf.skipBytes(2); // binary length 26
        int deviceId = buf.readUnsignedShortLE();
        deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
        if (deviceSession == null) {
            return null;
        }
        long unixTime = buf.readUnsignedIntLE();
        if (channel != null) {
            sendResponseCurrent(channel, deviceId, unixTime);
        }
        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        position.setTime(new Date(unixTime * 1000));

        decodeStructure(buf, position);
        return position;

    } else if (header.equals("+DDAT~")) {

        buf.skipBytes(2); // binary length
        int deviceId = buf.readUnsignedShortLE();
        deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
        if (deviceSession == null) {
            return null;
        }
        byte format = buf.readByte();
        if (format != 4) {
            return null;
        }
        byte nblocks = buf.readByte();
        int packNum = buf.readUnsignedShortLE();
        if (channel != null) {
            sendResponseArchive(channel, deviceId, packNum);
        }
        List<Position> positions = new ArrayList<>();
        while (nblocks > 0) {
            nblocks--;
            long unixTime = buf.readUnsignedIntLE();
            int timeIncrement = buf.getUnsignedShortLE(buf.readerIndex() + 120);
            for (int i = 0; i < 6; i++) {
                if (buf.getUnsignedByte(buf.readerIndex()) != 0xFE) {
                    Position position = new Position(getProtocolName());
                    position.setDeviceId(deviceSession.getDeviceId());
                    position.setTime(new Date((unixTime + i * timeIncrement) * 1000));
                    decodeStructure(buf, position);
                    position.set(Position.KEY_ARCHIVE, true);
                    positions.add(position);
                } else {
                    buf.skipBytes(20); // skip filled 0xFE structure
                }
            }
            buf.skipBytes(2); // increment
        }
        return positions;

    }

    return null;
}

---

From source file:org.traccar.protocol.MeitrackProtocolDecoder.java

License:Apache License

private List<Position> decodeBinaryC(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
    List<Position> positions = new LinkedList<>();

    String flag = buf.toString(2, 1, StandardCharsets.US_ASCII);
    int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');

    String imei = buf.toString(index + 1, 15, StandardCharsets.US_ASCII);
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }//from www  .j a va  2 s .  c om

    buf.skipBytes(index + 1 + 15 + 1 + 3 + 1 + 2 + 2 + 4);

    while (buf.readableBytes() >= 0x34) {

        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        position.set(Position.KEY_EVENT, buf.readUnsignedByte());

        position.setLatitude(buf.readIntLE() * 0.000001);
        position.setLongitude(buf.readIntLE() * 0.000001);

        position.setTime(new Date((946684800 + buf.readUnsignedIntLE()) * 1000)); // 946684800 = 2000-01-01

        position.setValid(buf.readUnsignedByte() == 1);

        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
        int rssi = buf.readUnsignedByte();

        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
        position.setCourse(buf.readUnsignedShortLE());

        position.set(Position.KEY_HDOP, buf.readUnsignedShortLE() * 0.1);

        position.setAltitude(buf.readUnsignedShortLE());

        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
        position.set("runtime", buf.readUnsignedIntLE());

        position.setNetwork(new Network(CellTower.from(buf.readUnsignedShortLE(), buf.readUnsignedShortLE(),
                buf.readUnsignedShortLE(), buf.readUnsignedShortLE(), rssi)));

        position.set(Position.KEY_STATUS, buf.readUnsignedShortLE());

        position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.01);
        position.set(Position.KEY_POWER, buf.readUnsignedShortLE());

        buf.readUnsignedIntLE(); // geo-fence

        positions.add(position);
    }

    if (channel != null) {
        StringBuilder command = new StringBuilder("@@");
        command.append(flag).append(27 + positions.size() / 10).append(",");
        command.append(imei).append(",CCC,").append(positions.size()).append("*");
        int checksum = 0;
        for (int i = 0; i < command.length(); i += 1) {
            checksum += command.charAt(i);
        }
        command.append(String.format("%02x", checksum & 0xff).toUpperCase());
        command.append("\r\n");
        channel.writeAndFlush(new NetworkMessage(command.toString(), remoteAddress)); // delete processed data
    }

    return positions;
}

---

From source file:org.traccar.protocol.MeitrackProtocolDecoder.java

License:Apache License

private List<Position> decodeBinaryE(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
    List<Position> positions = new LinkedList<>();

    buf.readerIndex(buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',') + 1);
    String imei = buf.readSlice(15).toString(StandardCharsets.US_ASCII);
    buf.skipBytes(1 + 3 + 1);//from   w  ww. java 2  s  .  c o m

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }

    buf.readUnsignedIntLE(); // remaining cache
    int count = buf.readUnsignedShortLE();

    for (int i = 0; i < count; i++) {
        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        buf.readUnsignedShortLE(); // length
        buf.readUnsignedShortLE(); // index

        int paramCount = buf.readUnsignedByte();
        for (int j = 0; j < paramCount; j++) {
            int id = buf.readUnsignedByte();
            switch (id) {
            case 0x01:
                position.set(Position.KEY_EVENT, buf.readUnsignedByte());
                break;
            case 0x05:
                position.setValid(buf.readUnsignedByte() > 0);
                break;
            case 0x06:
                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
                break;
            case 0x07:
                position.set(Position.KEY_RSSI, buf.readUnsignedByte());
                break;
            default:
                buf.readUnsignedByte();
                break;
            }
        }

        paramCount = buf.readUnsignedByte();
        for (int j = 0; j < paramCount; j++) {
            int id = buf.readUnsignedByte();
            switch (id) {
            case 0x08:
                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
                break;
            case 0x09:
                position.setCourse(buf.readUnsignedShortLE());
                break;
            case 0x0B:
                position.setAltitude(buf.readShortLE());
                break;
            case 0x19:
                position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.01);
                break;
            case 0x1A:
                position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.01);
                break;
            default:
                buf.readUnsignedShortLE();
                break;
            }
        }

        paramCount = buf.readUnsignedByte();
        for (int j = 0; j < paramCount; j++) {
            int id = buf.readUnsignedByte();
            switch (id) {
            case 0x02:
                position.setLatitude(buf.readIntLE() * 0.000001);
                break;
            case 0x03:
                position.setLongitude(buf.readIntLE() * 0.000001);
                break;
            case 0x04:
                position.setTime(new Date((946684800 + buf.readUnsignedIntLE()) * 1000)); // 2000-01-01
                break;
            case 0x0D:
                position.set("runtime", buf.readUnsignedIntLE());
                break;
            default:
                buf.readUnsignedIntLE();
                break;
            }
        }

        paramCount = buf.readUnsignedByte();
        for (int j = 0; j < paramCount; j++) {
            buf.readUnsignedByte(); // id
            buf.skipBytes(buf.readUnsignedByte()); // value
        }

        positions.add(position);
    }

    return positions;
}

---

From source file:org.traccar.protocol.MxtProtocolDecoder.java

License:Apache License

@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

    ByteBuf buf = (ByteBuf) msg;

    buf.readUnsignedByte(); // start
    int device = buf.readUnsignedByte(); // device descriptor
    int type = buf.readUnsignedByte();

    long id = buf.readUnsignedIntLE();
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
    if (deviceSession == null) {
        return null;
    }/*from  ww  w  .j  a  v  a  2s  .c o  m*/

    if (type == MSG_POSITION) {

        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        buf.readUnsignedByte(); // protocol
        int infoGroups = buf.readUnsignedByte();

        position.set(Position.KEY_INDEX, buf.readUnsignedShortLE());

        DateBuilder dateBuilder = new DateBuilder().setDate(2000, 1, 1);

        long date = buf.readUnsignedIntLE();

        long days = BitUtil.from(date, 6 + 6 + 5);
        long hours = BitUtil.between(date, 6 + 6, 6 + 6 + 5);
        long minutes = BitUtil.between(date, 6, 6 + 6);
        long seconds = BitUtil.to(date, 6);

        dateBuilder.addMillis((((days * 24 + hours) * 60 + minutes) * 60 + seconds) * 1000);

        position.setTime(dateBuilder.getDate());

        position.setValid(true);
        position.setLatitude(buf.readIntLE() / 1000000.0);
        position.setLongitude(buf.readIntLE() / 1000000.0);

        long flags = buf.readUnsignedIntLE();
        position.set(Position.KEY_IGNITION, BitUtil.check(flags, 0));
        if (BitUtil.check(flags, 1)) {
            position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
        }
        position.set(Position.KEY_INPUT, BitUtil.between(flags, 2, 7));
        position.set(Position.KEY_OUTPUT, BitUtil.between(flags, 7, 10));
        position.setCourse(BitUtil.between(flags, 10, 13) * 45);
        // position.setValid(BitUtil.check(flags, 15));
        position.set(Position.KEY_CHARGE, BitUtil.check(flags, 20));

        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));

        buf.readUnsignedByte(); // input mask

        if (BitUtil.check(infoGroups, 0)) {
            buf.skipBytes(8); // waypoints
        }

        if (BitUtil.check(infoGroups, 1)) {
            buf.skipBytes(8); // wireless accessory
        }

        if (BitUtil.check(infoGroups, 2)) {
            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
            position.set(Position.KEY_HDOP, buf.readUnsignedByte());
            position.setAccuracy(buf.readUnsignedByte());
            position.set(Position.KEY_RSSI, buf.readUnsignedByte());
            buf.readUnsignedShortLE(); // time since boot
            position.set(Position.KEY_POWER, buf.readUnsignedByte());
            position.set(Position.PREFIX_TEMP + 1, buf.readByte());
        }

        if (BitUtil.check(infoGroups, 3)) {
            position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
        }

        if (BitUtil.check(infoGroups, 4)) {
            position.set(Position.KEY_HOURS, UnitsConverter.msFromMinutes(buf.readUnsignedIntLE()));
        }

        if (BitUtil.check(infoGroups, 5)) {
            buf.readUnsignedIntLE(); // reason
        }

        if (BitUtil.check(infoGroups, 6)) {
            position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
            position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE());
        }

        if (BitUtil.check(infoGroups, 7)) {
            position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(buf.readUnsignedIntLE()));
        }

        buf.readerIndex(buf.writerIndex() - 3);
        sendResponse(channel, device, id, buf.readUnsignedShortLE());

        return position;
    }

    return null;
}

---

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