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   1 /**
   2  * Copyright (c) 2010-2023 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.modbus.internal.handler;
  14
  15 import java.util.Collection;
  16 import java.util.Collections;
  17 import java.util.Optional;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.openhab.binding.modbus.discovery.internal.ModbusEndpointDiscoveryService;
  21 import org.openhab.binding.modbus.handler.EndpointNotInitializedException;
  22 import org.openhab.binding.modbus.internal.ModbusConfigurationException;
  23 import org.openhab.binding.modbus.internal.config.ModbusSerialConfiguration;
  24 import org.openhab.core.io.transport.modbus.ModbusManager;
  25 import org.openhab.core.io.transport.modbus.endpoint.EndpointPoolConfiguration;
  26 import org.openhab.core.io.transport.modbus.endpoint.ModbusSerialSlaveEndpoint;
  27 import org.openhab.core.thing.Bridge;
  28 import org.openhab.core.thing.ThingUID;
  29 import org.openhab.core.thing.binding.ThingHandlerService;
  30
  31 /**
  32  * Endpoint thing handler for serial slaves
  33  *
  34  * @author Sami Salonen - Initial contribution
  35  */
  36 @NonNullByDefault
  37 public class ModbusSerialThingHandler
  38         extends AbstractModbusEndpointThingHandler<ModbusSerialSlaveEndpoint, ModbusSerialConfiguration> {
  39
  40     public ModbusSerialThingHandler(Bridge bridge, ModbusManager manager) {
  41         super(bridge, manager);
  42     }
  43
  44     @Override
  45     protected void configure() throws ModbusConfigurationException {
  46         ModbusSerialConfiguration config = getConfigAs(ModbusSerialConfiguration.class);
  47         String port = config.getPort();
  48         int baud = config.getBaud();
  49         String flowControlIn = config.getFlowControlIn();
  50         String flowControlOut = config.getFlowControlOut();
  51         String stopBits = config.getStopBits();
  52         String parity = config.getParity();
  53         String encoding = config.getEncoding();
  54         if (port == null || flowControlIn == null || flowControlOut == null || stopBits == null || parity == null
  55                 || encoding == null) {
  56             throw new ModbusConfigurationException(
  57                     "port, baud, flowControlIn, flowControlOut, stopBits, parity, encoding all must be non-null!");
  58         }
  59
  60         this.config = config;
  61
  62         EndpointPoolConfiguration poolConfiguration = new EndpointPoolConfiguration();
  63         this.poolConfiguration = poolConfiguration;
  64         poolConfiguration.setConnectMaxTries(config.getConnectMaxTries());
  65         poolConfiguration.setAfterConnectionDelayMillis(config.getAfterConnectionDelayMillis());
  66         poolConfiguration.setConnectTimeoutMillis(config.getConnectTimeoutMillis());
  67         poolConfiguration.setInterTransactionDelayMillis(config.getTimeBetweenTransactionsMillis());
  68
  69         // Never reconnect serial connections "automatically"
  70         poolConfiguration.setInterConnectDelayMillis(1000);
  71         poolConfiguration.setReconnectAfterMillis(-1);
  72
  73         endpoint = new ModbusSerialSlaveEndpoint(port, baud, flowControlIn, flowControlOut, config.getDataBits(),
  74                 stopBits, parity, encoding, config.isEcho(), config.getReceiveTimeoutMillis());
  75     }
  76
  77     /**
  78      * Return true if auto discovery is enabled in the config
  79      */
  80     @Override
  81     public boolean isDiscoveryEnabled() {
  82         if (config != null) {
  83             return config.isDiscoveryEnabled();
  84         } else {
  85             return false;
  86         }
  87     }
  88
  89     @SuppressWarnings("null") // Since endpoint in Optional.map cannot be null
  90     @Override
  91     protected String formatConflictingParameterError() {
  92         return String.format(
  93                 "Endpoint '%s' has conflicting parameters: parameters of this thing (%s '%s') are different from some other thing's parameter. Ensure that all endpoints pointing to serial port '%s' have same parameters.",
  94                 endpoint, thing.getUID(), this.thing.getLabel(),
  95                 Optional.ofNullable(this.endpoint).map(e -> e.getPortName()).orElse("<null>"));
  96     }
  97
  98     @Override
  99     public int getSlaveId() throws EndpointNotInitializedException {
 100         ModbusSerialConfiguration config = this.config;
 101         if (config == null) {
 102             throw new EndpointNotInitializedException();
 103         }
 104         return config.getId();
 105     }
 106
 107     @Override
 108     public ThingUID getUID() {
 109         return getThing().getUID();
 110     }
 111
 112     @Override
 113     public Collection<Class<? extends ThingHandlerService>> getServices() {
 114         return Collections.singleton(ModbusEndpointDiscoveryService.class);
 115     }
 116 }