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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.*;
  16
  17 import java.util.HashMap;
  18 import java.util.Map;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.openhab.binding.gpio.internal.NoGpioIdException;
  22 import org.openhab.binding.gpio.internal.configuration.GPIOInputConfiguration;
  23 import org.openhab.binding.gpio.internal.configuration.GPIOOutputConfiguration;
  24 import org.openhab.binding.gpio.internal.configuration.PigpioConfiguration;
  25 import org.openhab.core.thing.ChannelUID;
  26 import org.openhab.core.thing.Thing;
  27 import org.openhab.core.thing.ThingStatus;
  28 import org.openhab.core.thing.ThingStatusDetail;
  29 import org.openhab.core.thing.binding.BaseThingHandler;
  30 import org.openhab.core.thing.type.ChannelTypeUID;
  31 import org.openhab.core.types.Command;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 import eu.xeli.jpigpio.JPigpio;
  36 import eu.xeli.jpigpio.PigpioException;
  37 import eu.xeli.jpigpio.PigpioSocket;
  38
  39 /**
  40  * Remote pigpio Handler
  41  *
  42  * This bridge is used to control remote pigpio instances.
  43  *
  44  * @author Nils Bauer - Initial contribution
  45  * @author Jan N. Klug - Channel redesign
  46  */
  47 @NonNullByDefault
  48 public class PigpioRemoteHandler extends BaseThingHandler {
  49     private final Logger logger = LoggerFactory.getLogger(PigpioRemoteHandler.class);
  50     private final Map<ChannelUID, ChannelHandler> channelHandlers = new HashMap<>();
  51
  52     /**
  53      * Instantiates a new pigpio remote bridge handler.
  54      *
  55      * @param thing the thing
  56      */
  57     public PigpioRemoteHandler(Thing thing) {
  58         super(thing);
  59     }
  60
  61     @Override
  62     public void handleCommand(ChannelUID channelUID, Command command) {
  63         ChannelHandler channelHandler = channelHandlers.get(channelUID);
  64         if (channelHandler != null) {
  65             channelHandler.handleCommand(command);
  66         }
  67     }
  68
  69     @Override
  70     public void initialize() {
  71         PigpioConfiguration config = getConfigAs(PigpioConfiguration.class);
  72         String host = config.host;
  73         int port = config.port;
  74         JPigpio jPigpio;
  75         if (host == null) {
  76             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.CONFIGURATION_ERROR,
  77                     "Cannot connect to PiGPIO Service on remote raspberry. IP address not set.");
  78             return;
  79         }
  80         try {
  81             jPigpio = new PigpioSocket(host, port);
  82             updateStatus(ThingStatus.ONLINE);
  83         } catch (PigpioException e) {
  84             if (e.getErrorCode() == PigpioException.PI_BAD_SOCKET_PORT) {
  85                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.CONFIGURATION_ERROR, "Port out of range");
  86             } else {
  87                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.COMMUNICATION_ERROR,
  88                         e.getLocalizedMessage());
  89             }
  90             return;
  91         }
  92         thing.getChannels().forEach(channel -> {
  93             ChannelUID channelUID = channel.getUID();
  94             ChannelTypeUID type = channel.getChannelTypeUID();
  95             try {
  96                 if (CHANNEL_TYPE_DIGITAL_INPUT.equals(type)) {
  97                     GPIOInputConfiguration configuration = channel.getConfiguration().as(GPIOInputConfiguration.class);
  98                     channelHandlers.put(channelUID, new PigpioDigitalInputHandler(configuration, jPigpio, scheduler,
  99                             state -> updateState(channelUID.getId(), state)));
 100                 } else if (CHANNEL_TYPE_DIGITAL_OUTPUT.equals(type)) {
 101                     GPIOOutputConfiguration configuration = channel.getConfiguration()
 102                             .as(GPIOOutputConfiguration.class);
 103                     channelHandlers.put(channelUID, new PigpioDigitalOutputHandler(configuration, jPigpio,
 104                             state -> updateState(channelUID.getId(), state)));
 105                 }
 106             } catch (PigpioException e) {
 107                 logger.warn("Failed to initialize {}: {}", channelUID, e.getMessage());
 108             } catch (NoGpioIdException e) {
 109                 logger.warn("Failed to initialize {}: GpioId is not set", channelUID);
 110             }
 111         });
 112     }
 113 }