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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.smartmeter.internal.iec62056;
  14
  15 import java.io.IOException;
  16 import java.time.Duration;
  17 import java.util.function.Supplier;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.openhab.binding.smartmeter.connectors.ConnectorBase;
  22 import org.openhab.binding.smartmeter.internal.helper.Baudrate;
  23 import org.openhab.binding.smartmeter.internal.helper.ProtocolMode;
  24 import org.openhab.core.io.transport.serial.SerialPortManager;
  25 import org.openmuc.j62056.DataMessage;
  26 import org.openmuc.j62056.Iec21Port;
  27 import org.openmuc.j62056.Iec21Port.Builder;
  28 import org.openmuc.j62056.ModeDListener;
  29 import org.reactivestreams.Publisher;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 import io.reactivex.Flowable;
  34 import io.reactivex.FlowableEmitter;
  35
  36 /**
  37  * This connector reads meter values with IEC62056-21 protocol.
  38  *
  39  * @author Matthias Steigenberger - Initial contribution
  40  *
  41  */
  42 @NonNullByDefault
  43 public class Iec62056_21SerialConnector extends ConnectorBase<DataMessage> {
  44
  45     private final Logger logger = LoggerFactory.getLogger(Iec62056_21SerialConnector.class);
  46     private int baudrate;
  47     private int baudrateChangeDelay;
  48     private ProtocolMode protocolMode;
  49     @Nullable
  50     private Iec21Port iec21Port;
  51
  52     public Iec62056_21SerialConnector(Supplier<SerialPortManager> serialPortManagerSupplier, String portName,
  53             int baudrate, int baudrateChangeDelay, ProtocolMode protocolMode) {
  54         super(portName);
  55         this.baudrate = baudrate;
  56         this.baudrateChangeDelay = baudrateChangeDelay;
  57         this.protocolMode = protocolMode;
  58     }
  59
  60     @Override
  61     protected boolean applyPeriod() {
  62         return protocolMode != ProtocolMode.D;
  63     }
  64
  65     @Override
  66     protected boolean applyRetryHandling() {
  67         return protocolMode != ProtocolMode.D;
  68     }
  69
  70     @Override
  71     protected Publisher<?> getRetryPublisher(Duration period, Publisher<Throwable> attempts) {
  72         if (protocolMode == ProtocolMode.D) {
  73             return Flowable.empty();
  74         } else {
  75             return super.getRetryPublisher(period, attempts);
  76         }
  77     }
  78
  79     @Override
  80     protected DataMessage readNext(byte @Nullable [] initMessage) throws IOException {
  81         if (iec21Port != null) {
  82             DataMessage dataMessage = iec21Port.read();
  83             logger.debug("Datamessage read: {}", dataMessage);
  84             return dataMessage;
  85         }
  86         throw new IOException("SerialPort was not yet created!");
  87     }
  88
  89     @Override
  90     protected void emitValues(byte @Nullable [] initMessage, FlowableEmitter<@Nullable DataMessage> emitter)
  91             throws IOException {
  92         switch (protocolMode) {
  93             case ABC:
  94                 super.emitValues(initMessage, emitter);
  95                 break;
  96             case D:
  97                 if (iec21Port != null) {
  98                     iec21Port.listen(new ModeDListener() {
  99
 100                         @Override
 101                         public void newDataMessage(@Nullable DataMessage dataMessage) {
 102                             logger.debug("Datamessage read: {}", dataMessage);
 103                             emitter.onNext(dataMessage);
 104                         }
 105
 106                         @Override
 107                         public void exceptionWhileListening(@Nullable Exception e) {
 108                             logger.warn("Exception while listening for mode D data message", e);
 109                         }
 110                     });
 111                 }
 112                 break;
 113             case SML:
 114                 throw new IOException("SML mode not supported");
 115         }
 116     }
 117
 118     @Override
 119     public void openConnection() throws IOException {
 120         Builder iec21Builder = new Iec21Port.Builder(getPortName());
 121         if (Baudrate.fromBaudrate(this.baudrate) != Baudrate.AUTO) {
 122             iec21Builder.setInitialBaudrate(this.baudrate);
 123         }
 124         iec21Builder.setBaudRateChangeDelay(baudrateChangeDelay);
 125         iec21Builder.enableVerboseMode(true);
 126         iec21Port = iec21Builder.buildAndOpen();
 127     }
 128
 129     @Override
 130     public void closeConnection() {
 131         if (iec21Port != null) {
 132             iec21Port.close();
 133         }
 134     }
 135 }