RFXComTemperatureMessage.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.binding.rfxcom.internal.messages;

import java.util.Arrays;
import java.util.List;

import javax.xml.bind.DatatypeConverter;

import org.openhab.binding.rfxcom.RFXComValueSelector;
import org.openhab.binding.rfxcom.internal.RFXComException;
import org.openhab.core.library.items.NumberItem;
import org.openhab.core.library.items.StringItem;
import org.openhab.core.library.types.DecimalType;
import org.openhab.core.library.types.StringType;
import org.openhab.core.types.State;
import org.openhab.core.types.Type;
import org.openhab.core.types.UnDefType;

/**
 * RFXCOM data class for temperature and humidity message.
 *
 * @author Pauli Anttila
 * @since 1.2.0
 */
public class RFXComTemperatureMessage extends RFXComBaseMessage {

    public enum SubType {
        THR128_138_THC138(1),
        THC238_268_THN122_132_THWR288_THRN122_AW129_131(2),
        THWR800(3),
        RTHN318(4),
        LACROSSE_TX2_TX3_TX4_TX17(5),
        TS15C(6),
        VIKING_02811(7),
        LACROSSE_WS2300(8),
        RUBICSON(9),
        TFA_30_3133(10),
        WT0122(11),

        UNKNOWN(255);

        private final int subType;

        SubType(int subType) {
            this.subType = subType;
        }

        SubType(byte subType) {
            this.subType = subType;
        }

        public byte toByte() {
            return (byte) subType;
        }

        public static SubType fromByte(int input) {
            for (SubType c : SubType.values()) {
                if (c.subType == input) {
                    return c;
                }
            }

            return SubType.UNKNOWN;
        }
    }

    private final static List<RFXComValueSelector> supportedValueSelectors = Arrays.asList(RFXComValueSelector.RAW_DATA,
            RFXComValueSelector.SIGNAL_LEVEL, RFXComValueSelector.BATTERY_LEVEL, RFXComValueSelector.TEMPERATURE);

    public SubType subType = SubType.UNKNOWN;
    public int sensorId = 0;
    public double temperature = 0;
    public byte signalLevel = 0;
    public byte batteryLevel = 0;

    public RFXComTemperatureMessage() {
        packetType = PacketType.TEMPERATURE;
    }

    public RFXComTemperatureMessage(byte[] data) {
        encodeMessage(data);
    }

    @Override
    public String toString() {
        String str = "";

        str += super.toString();
        str += "\n - Sub type = " + subType;
        str += "\n - Id = " + sensorId;
        str += "\n - Temperature = " + temperature;
        str += "\n - Signal level = " + signalLevel;
        str += "\n - Battery level = " + batteryLevel;

        return str;
    }

    @Override
    public void encodeMessage(byte[] data) {

        super.encodeMessage(data);

        subType = SubType.fromByte(super.subType);
        sensorId = (data[4] & 0xFF) << 8 | (data[5] & 0xFF);

        temperature = (short) ((data[6] & 0x7F) << 8 | (data[7] & 0xFF)) * 0.1;
        if ((data[6] & 0x80) != 0) {
            temperature = -temperature;
        }

        signalLevel = (byte) ((data[8] & 0xF0) >> 4);
        batteryLevel = (byte) (data[8] & 0x0F);
    }

    @Override
    public byte[] decodeMessage() {
        byte[] data = new byte[9];

        data[0] = 0x08;
        data[1] = RFXComBaseMessage.PacketType.TEMPERATURE.toByte();
        data[2] = subType.toByte();
        data[3] = seqNbr;
        data[4] = (byte) ((sensorId & 0xFF00) >> 8);
        data[5] = (byte) (sensorId & 0x00FF);

        short temp = (short) Math.abs(temperature * 10);
        data[6] = (byte) ((temp >> 8) & 0xFF);
        data[7] = (byte) (temp & 0xFF);
        if (temperature < 0) {
            data[6] |= 0x80;
        }

        data[8] = (byte) (((signalLevel & 0x0F) << 4) | (batteryLevel & 0x0F));

        return data;
    }

    @Override
    public String generateDeviceId() {
        return String.valueOf(sensorId);
    }

    @Override
    public State convertToState(RFXComValueSelector valueSelector) throws RFXComException {

        org.openhab.core.types.State state = UnDefType.UNDEF;

        if (valueSelector.getItemClass() == NumberItem.class) {

            if (valueSelector == RFXComValueSelector.SIGNAL_LEVEL) {

                state = new DecimalType(signalLevel);

            } else if (valueSelector == RFXComValueSelector.BATTERY_LEVEL) {

                state = new DecimalType(batteryLevel);

            } else if (valueSelector == RFXComValueSelector.TEMPERATURE) {

                state = new DecimalType(temperature);

            } else {
                throw new RFXComException("Can't convert " + valueSelector + " to NumberItem");
            }

        } else if (valueSelector.getItemClass() == StringItem.class) {

            if (valueSelector == RFXComValueSelector.RAW_DATA) {

                state = new StringType(DatatypeConverter.printHexBinary(rawMessage));

            } else {
                throw new RFXComException("Can't convert " + valueSelector + " to StringItem");
            }
        } else {

            throw new RFXComException("Can't convert " + valueSelector + " to " + valueSelector.getItemClass());

        }

        return state;
    }

    @Override
    public void convertFromState(RFXComValueSelector valueSelector, String id, Object subType, Type type,
            byte seqNumber) throws RFXComException {

        throw new RFXComException("Not supported");
    }

    @Override
    public Object convertSubType(String subType) throws RFXComException {

        for (SubType s : SubType.values()) {
            if (s.toString().equals(subType)) {
                return s;
            }
        }

        throw new RFXComException("Unknown sub type " + subType);
    }

    @Override
    public List<RFXComValueSelector> getSupportedValueSelectors() throws RFXComException {
        return supportedValueSelectors;
    }

}