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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.nuvo.internal.communication;
  14
  15 import java.io.IOException;
  16 import java.io.InputStream;
  17 import java.io.OutputStream;
  18 import java.io.UnsupportedEncodingException;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.openhab.binding.nuvo.internal.NuvoException;
  23 import org.openhab.core.io.transport.serial.PortInUseException;
  24 import org.openhab.core.io.transport.serial.SerialPort;
  25 import org.openhab.core.io.transport.serial.SerialPortIdentifier;
  26 import org.openhab.core.io.transport.serial.SerialPortManager;
  27 import org.openhab.core.io.transport.serial.UnsupportedCommOperationException;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 /**
  32  * Class for communicating with the Nuvo device through a serial connection
  33  *
  34  * @author Laurent Garnier - Initial contribution
  35  * @author Michael Lobstein - Adapted for the Nuvo binding
  36  */
  37 @NonNullByDefault
  38 public class NuvoSerialConnector extends NuvoConnector {
  39
  40     private final Logger logger = LoggerFactory.getLogger(NuvoSerialConnector.class);
  41
  42     private final String serialPortName;
  43     private final SerialPortManager serialPortManager;
  44     private final String uid;
  45
  46     private @Nullable SerialPort serialPort;
  47
  48     /**
  49      * Constructor
  50      *
  51      * @param serialPortManager the serial port manager
  52      * @param serialPortName the serial port name to be used
  53      * @param uid the thing uid string
  54      */
  55     public NuvoSerialConnector(SerialPortManager serialPortManager, String serialPortName, String uid) {
  56         this.serialPortManager = serialPortManager;
  57         this.serialPortName = serialPortName;
  58         this.uid = uid;
  59     }
  60
  61     @Override
  62     public synchronized void open() throws NuvoException {
  63         logger.debug("Opening serial connection on port {}", serialPortName);
  64         try {
  65             SerialPortIdentifier portIdentifier = serialPortManager.getIdentifier(serialPortName);
  66             if (portIdentifier == null) {
  67                 setConnected(false);
  68                 logger.warn("Opening serial connection failed: No Such Port: {}", serialPortName);
  69                 throw new NuvoException("Opening serial connection failed: No Such Port");
  70             }
  71
  72             SerialPort commPort = portIdentifier.open(this.getClass().getName(), 2000);
  73
  74             commPort.setSerialPortParams(57600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
  75             commPort.enableReceiveThreshold(1);
  76             commPort.enableReceiveTimeout(100);
  77             commPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
  78
  79             InputStream dataIn = commPort.getInputStream();
  80             OutputStream dataOut = commPort.getOutputStream();
  81
  82             if (dataOut != null) {
  83                 dataOut.flush();
  84             }
  85             if (dataIn != null && dataIn.markSupported()) {
  86                 try {
  87                     dataIn.reset();
  88                 } catch (IOException e) {
  89                 }
  90             }
  91
  92             Thread thread = new NuvoReaderThread(this, this.uid, this.serialPortName);
  93             setReaderThread(thread);
  94             thread.start();
  95
  96             this.serialPort = commPort;
  97             this.dataIn = dataIn;
  98             this.dataOut = dataOut;
  99
 100             setConnected(true);
 101
 102             logger.debug("Serial connection opened");
 103         } catch (PortInUseException e) {
 104             setConnected(false);
 105             throw new NuvoException("Opening serial connection failed: Port in Use Exception", e);
 106         } catch (UnsupportedCommOperationException e) {
 107             setConnected(false);
 108             throw new NuvoException("Opening serial connection failed: Unsupported Comm Operation Exception", e);
 109         } catch (UnsupportedEncodingException e) {
 110             setConnected(false);
 111             throw new NuvoException("Opening serial connection failed: Unsupported Encoding Exception", e);
 112         } catch (IOException e) {
 113             setConnected(false);
 114             throw new NuvoException("Opening serial connection failed: IO Exception", e);
 115         }
 116     }
 117
 118     @Override
 119     public synchronized void close() {
 120         logger.debug("Closing serial connection");
 121         SerialPort serialPort = this.serialPort;
 122         if (serialPort != null) {
 123             serialPort.removeEventListener();
 124         }
 125         super.cleanup();
 126         if (serialPort != null) {
 127             serialPort.close();
 128             this.serialPort = null;
 129         }
 130         setConnected(false);
 131         logger.debug("Serial connection closed");
 132     }
 133 }