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   1 /**
   2  * Copyright (c) 2010-2021 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.gpio.internal.handler;
  14
  15 import static org.openhab.binding.gpio.internal.GPIOBindingConstants.CHANNEL_TYPE_DIGITAL_INPUT;
  16 import static org.openhab.binding.gpio.internal.GPIOBindingConstants.CHANNEL_TYPE_DIGITAL_OUTPUT;
  17
  18 import java.util.HashMap;
  19 import java.util.Map;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.openhab.binding.gpio.internal.NoGpioIdException;
  23 import org.openhab.binding.gpio.internal.configuration.GPIOInputConfiguration;
  24 import org.openhab.binding.gpio.internal.configuration.GPIOOutputConfiguration;
  25 import org.openhab.binding.gpio.internal.configuration.PigpioConfiguration;
  26 import org.openhab.core.thing.*;
  27 import org.openhab.core.thing.binding.BaseThingHandler;
  28 import org.openhab.core.thing.type.ChannelTypeUID;
  29 import org.openhab.core.types.Command;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 import eu.xeli.jpigpio.JPigpio;
  34 import eu.xeli.jpigpio.PigpioException;
  35 import eu.xeli.jpigpio.PigpioSocket;
  36
  37 /**
  38  * Remote pigpio Handler
  39  *
  40  * This bridge is used to control remote pigpio instances.
  41  *
  42  * @author Nils Bauer - Initial contribution
  43  * @author Jan N. Klug - Channel redesign
  44  */
  45 @NonNullByDefault
  46 public class PigpioRemoteHandler extends BaseThingHandler {
  47     private final Logger logger = LoggerFactory.getLogger(PigpioRemoteHandler.class);
  48     private final Map<ChannelUID, ChannelHandler> channelHandlers = new HashMap<>();
  49
  50     /**
  51      * Instantiates a new pigpio remote bridge handler.
  52      *
  53      * @param thing the thing
  54      */
  55     public PigpioRemoteHandler(Thing thing) {
  56         super(thing);
  57     }
  58
  59     @Override
  60     public void handleCommand(ChannelUID channelUID, Command command) {
  61         ChannelHandler channelHandler = channelHandlers.get(channelUID);
  62         if (channelHandler != null) {
  63             channelHandler.handleCommand(command);
  64         }
  65     }
  66
  67     @Override
  68     public void initialize() {
  69         PigpioConfiguration config = getConfigAs(PigpioConfiguration.class);
  70         String host = config.host;
  71         int port = config.port;
  72         JPigpio jPigpio;
  73         if (host == null) {
  74             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.CONFIGURATION_ERROR,
  75                     "Cannot connect to PiGPIO Service on remote raspberry. IP address not set.");
  76             return;
  77         }
  78         try {
  79             jPigpio = new PigpioSocket(host, port);
  80             updateStatus(ThingStatus.ONLINE);
  81         } catch (PigpioException e) {
  82             if (e.getErrorCode() == PigpioException.PI_BAD_SOCKET_PORT) {
  83                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.CONFIGURATION_ERROR, "Port out of range");
  84             } else {
  85                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.COMMUNICATION_ERROR,
  86                         e.getLocalizedMessage());
  87             }
  88             return;
  89         }
  90         thing.getChannels().forEach(channel -> {
  91             ChannelUID channelUID = channel.getUID();
  92             ChannelTypeUID type = channel.getChannelTypeUID();
  93             try {
  94                 if (CHANNEL_TYPE_DIGITAL_INPUT.equals(type)) {
  95                     GPIOInputConfiguration configuration = channel.getConfiguration().as(GPIOInputConfiguration.class);
  96                     channelHandlers.put(channelUID, new PigpioDigitalInputHandler(configuration, jPigpio, scheduler,
  97                             state -> updateState(channelUID.getId(), state)));
  98                 } else if (CHANNEL_TYPE_DIGITAL_OUTPUT.equals(type)) {
  99                     GPIOOutputConfiguration configuration = channel.getConfiguration()
 100                             .as(GPIOOutputConfiguration.class);
 101                     channelHandlers.put(channelUID, new PigpioDigitalOutputHandler(configuration, jPigpio,
 102                             state -> updateState(channelUID.getId(), state)));
 103                 }
 104             } catch (PigpioException e) {
 105                 logger.warn("Failed to initialize {}: {}", channelUID, e.getMessage());
 106             } catch (NoGpioIdException e) {
 107                 logger.warn("Failed to initialize {}: GpioId is not set", channelUID);
 108             }
 109         });
 110     }
 111 }