Example usage for io.netty.buffer ByteBuf readUnsignedShortLE

List of usage examples for io.netty.buffer ByteBuf readUnsignedShortLE

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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.TramigoProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    int protocol = buf.readUnsignedByte();
    boolean legacy = protocol == 0x80;

    buf.readUnsignedByte(); // version id
    int index = legacy ? buf.readUnsignedShort() : buf.readUnsignedShortLE();
    int type = legacy ? buf.readUnsignedShort() : buf.readUnsignedShortLE();
    buf.readUnsignedShort(); // length
    buf.readUnsignedShort(); // mask
    buf.readUnsignedShort(); // checksum
    long id = legacy ? buf.readUnsignedInt() : buf.readUnsignedIntLE();
    buf.readUnsignedInt(); // time

    Position position = new Position(getProtocolName());
    position.set(Position.KEY_INDEX, index);
    position.setValid(true);//from  w  ww  .jav  a2 s. c  o m

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
    if (deviceSession == null) {
        return null;
    }
    position.setDeviceId(deviceSession.getDeviceId());

    if (protocol == 0x01 && (type == MSG_COMPACT || type == MSG_FULL)) {

        // need to send ack?

        buf.readUnsignedShortLE(); // report trigger
        buf.readUnsignedShortLE(); // state flag

        position.setLatitude(buf.readUnsignedIntLE() * 0.0000001);
        position.setLongitude(buf.readUnsignedIntLE() * 0.0000001);

        position.set(Position.KEY_RSSI, buf.readUnsignedShortLE());
        position.set(Position.KEY_SATELLITES, buf.readUnsignedShortLE());
        position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedShortLE());
        position.set("gpsAntennaStatus", buf.readUnsignedShortLE());

        position.setSpeed(buf.readUnsignedShortLE() * 0.194384);
        position.setCourse(buf.readUnsignedShortLE());

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

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

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

        position.setTime(new Date(buf.readUnsignedIntLE() * 1000));

        // parse other data

        return position;

    } else if (legacy) {

        if (channel != null) {
            channel.writeAndFlush(new NetworkMessage(
                    Unpooled.copiedBuffer("gprs,ack," + index, StandardCharsets.US_ASCII), remoteAddress));
        }

        String sentence = buf.toString(StandardCharsets.US_ASCII);

        Pattern pattern = Pattern.compile("(-?\\d+\\.\\d+), (-?\\d+\\.\\d+)");
        Matcher matcher = pattern.matcher(sentence);
        if (!matcher.find()) {
            return null;
        }
        position.setLatitude(Double.parseDouble(matcher.group(1)));
        position.setLongitude(Double.parseDouble(matcher.group(2)));

        pattern = Pattern.compile("([NSWE]{1,2}) with speed (\\d+) km/h");
        matcher = pattern.matcher(sentence);
        if (matcher.find()) {
            for (int i = 0; i < DIRECTIONS.length; i++) {
                if (matcher.group(1).equals(DIRECTIONS[i])) {
                    position.setCourse(i * 45.0);
                    break;
                }
            }
            position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(matcher.group(2))));
        }

        pattern = Pattern.compile("(\\d{1,2}:\\d{2}(:\\d{2})? \\w{3} \\d{1,2})");
        matcher = pattern.matcher(sentence);
        if (!matcher.find()) {
            return null;
        }
        DateFormat dateFormat = new SimpleDateFormat(
                matcher.group(2) != null ? "HH:mm:ss MMM d yyyy" : "HH:mm MMM d yyyy", Locale.ENGLISH);
        position.setTime(DateUtil.correctYear(
                dateFormat.parse(matcher.group(1) + " " + Calendar.getInstance().get(Calendar.YEAR))));

        if (sentence.contains("Ignition on detected")) {
            position.set(Position.KEY_IGNITION, true);
        } else if (sentence.contains("Ignition off detected")) {
            position.set(Position.KEY_IGNITION, false);
        }

        return position;

    }

    return null;
}

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

License:Apache License

private void decodeTags(Position position, ByteBuf buf) {

    int blockLength = buf.readUnsignedShort();
    int blockEnd = buf.readerIndex() + blockLength;

    if (blockLength > 0) {

        buf.readUnsignedByte(); // tag type

        int count = buf.readUnsignedByte();
        int tagLength = buf.readUnsignedByte();

        for (int i = 1; i <= count; i++) {
            int tagEnd = buf.readerIndex() + tagLength;

            buf.readUnsignedByte(); // status
            buf.readUnsignedShortLE(); // battery voltage

            position.set(Position.PREFIX_TEMP + i, (buf.readShortLE() & 0x3fff) * 0.1);

            buf.readUnsignedByte(); // humidity
            buf.readUnsignedByte(); // rssi

            buf.readerIndex(tagEnd);/* w  ww . j  a  v a  2 s  .c o  m*/
        }

    }

    buf.readerIndex(blockEnd);

}