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   1 /**
   2  * Copyright (c) 2010-2024 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.smaenergymeter.internal.handler;
  14
  15 import java.io.IOException;
  16 import java.nio.ByteBuffer;
  17 import java.util.Arrays;
  18
  19 import org.openhab.core.library.types.DecimalType;
  20
  21 /**
  22  * The {@link EnergyMeter} class is responsible for communication with the SMA device
  23  * and extracting the data fields out of the received telegrams.
  24  *
  25  * @author Osman Basha - Initial contribution
  26  * @author Łukasz Dywicki - Extracted multicast group handling to
  27  *         {@link org.openhab.binding.smaenergymeter.internal.packet.PacketListener}.
  28  */
  29 public class EnergyMeter {
  30
  31     private static final byte[] E_METER_PROTOCOL_ID = new byte[] { 0x60, 0x69 };
  32
  33     private String serialNumber;
  34     private final FieldDTO powerIn;
  35     private final FieldDTO energyIn;
  36     private final FieldDTO powerOut;
  37     private final FieldDTO energyOut;
  38     private final FieldDTO powerInL1;
  39     private final FieldDTO energyInL1;
  40     private final FieldDTO powerOutL1;
  41     private final FieldDTO energyOutL1;
  42     private final FieldDTO powerInL2;
  43     private final FieldDTO energyInL2;
  44     private final FieldDTO powerOutL2;
  45     private final FieldDTO energyOutL2;
  46     private final FieldDTO powerInL3;
  47     private final FieldDTO energyInL3;
  48     private final FieldDTO powerOutL3;
  49     private final FieldDTO energyOutL3;
  50
  51     public EnergyMeter() {
  52         powerIn = new FieldDTO(0x20, 4, 10);
  53         energyIn = new FieldDTO(0x28, 8, 3600000);
  54         powerOut = new FieldDTO(0x34, 4, 10);
  55         energyOut = new FieldDTO(0x3C, 8, 3600000);
  56
  57         powerInL1 = new FieldDTO(0xA8, 4, 10);
  58         energyInL1 = new FieldDTO(0xB0, 8, 3600000); // +8
  59         powerOutL1 = new FieldDTO(0xBC, 4, 10); // + C
  60         energyOutL1 = new FieldDTO(0xC4, 8, 3600000); // +8
  61
  62         powerInL2 = new FieldDTO(0x138, 4, 10);
  63         energyInL2 = new FieldDTO(0x140, 8, 3600000); // +8
  64         powerOutL2 = new FieldDTO(0x14C, 4, 10); // + C
  65         energyOutL2 = new FieldDTO(0x154, 8, 3600000); // +8
  66
  67         powerInL3 = new FieldDTO(0x1C8, 4, 10);
  68         energyInL3 = new FieldDTO(0x1D0, 8, 3600000); // +8
  69         powerOutL3 = new FieldDTO(0x1DC, 4, 10); // + C
  70         energyOutL3 = new FieldDTO(0x1E4, 8, 3600000); // +8
  71     }
  72
  73     public void parse(byte[] bytes) throws IOException {
  74         try {
  75             String sma = new String(Arrays.copyOfRange(bytes, 0, 3));
  76             if (!"SMA".equals(sma)) {
  77                 throw new IOException("Not a SMA telegram." + sma);
  78             }
  79             byte[] protocolId = Arrays.copyOfRange(bytes, 16, 18);
  80             if (!Arrays.equals(protocolId, E_METER_PROTOCOL_ID)) {
  81                 throw new IllegalArgumentException(
  82                         "Received frame with wrong protocol ID " + Arrays.toString(protocolId));
  83             }
  84
  85             ByteBuffer buffer = ByteBuffer.wrap(Arrays.copyOfRange(bytes, 0x14, 0x18));
  86             serialNumber = Integer.toHexString(buffer.getInt());
  87
  88             powerIn.updateValue(bytes);
  89             energyIn.updateValue(bytes);
  90             powerOut.updateValue(bytes);
  91             energyOut.updateValue(bytes);
  92
  93             powerInL1.updateValue(bytes);
  94             energyInL1.updateValue(bytes);
  95             powerOutL1.updateValue(bytes);
  96             energyOutL1.updateValue(bytes);
  97
  98             powerInL2.updateValue(bytes);
  99             energyInL2.updateValue(bytes);
 100             powerOutL2.updateValue(bytes);
 101             energyOutL2.updateValue(bytes);
 102
 103             powerInL3.updateValue(bytes);
 104             energyInL3.updateValue(bytes);
 105             powerOutL3.updateValue(bytes);
 106             energyOutL3.updateValue(bytes);
 107         } catch (Exception e) {
 108             throw new IOException(e);
 109         }
 110     }
 111
 112     public String getSerialNumber() {
 113         return serialNumber;
 114     }
 115
 116     public DecimalType getPowerIn() {
 117         return new DecimalType(powerIn.getValue());
 118     }
 119
 120     public DecimalType getPowerOut() {
 121         return new DecimalType(powerOut.getValue());
 122     }
 123
 124     public DecimalType getEnergyIn() {
 125         return new DecimalType(energyIn.getValue());
 126     }
 127
 128     public DecimalType getEnergyOut() {
 129         return new DecimalType(energyOut.getValue());
 130     }
 131
 132     public DecimalType getPowerInL1() {
 133         return new DecimalType(powerInL1.getValue());
 134     }
 135
 136     public DecimalType getPowerOutL1() {
 137         return new DecimalType(powerOutL1.getValue());
 138     }
 139
 140     public DecimalType getEnergyInL1() {
 141         return new DecimalType(energyInL1.getValue());
 142     }
 143
 144     public DecimalType getEnergyOutL1() {
 145         return new DecimalType(energyOutL1.getValue());
 146     }
 147
 148     public DecimalType getPowerInL2() {
 149         return new DecimalType(powerInL2.getValue());
 150     }
 151
 152     public DecimalType getPowerOutL2() {
 153         return new DecimalType(powerOutL2.getValue());
 154     }
 155
 156     public DecimalType getEnergyInL2() {
 157         return new DecimalType(energyInL2.getValue());
 158     }
 159
 160     public DecimalType getEnergyOutL2() {
 161         return new DecimalType(energyOutL2.getValue());
 162     }
 163
 164     public DecimalType getPowerInL3() {
 165         return new DecimalType(powerInL3.getValue());
 166     }
 167
 168     public DecimalType getPowerOutL3() {
 169         return new DecimalType(powerOutL3.getValue());
 170     }
 171
 172     public DecimalType getEnergyInL3() {
 173         return new DecimalType(energyInL3.getValue());
 174     }
 175
 176     public DecimalType getEnergyOutL3() {
 177         return new DecimalType(energyOutL3.getValue());
 178     }
 179 }