001package jmri.jmrix.powerline; 002 003import jmri.implementation.AbstractSensor; 004 005/** 006 * Extend jmri.AbstractSensor for serial systems 007 * 008 * @author Bob Jacobsen Copyright (C) 2003, 2006, 2007, 2008 Converted to 009 * multiple connection 010 * @author kcameron Copyright (C) 2011 011 */ 012public class SerialSensor extends AbstractSensor { 013 014 public SerialSensor(String systemName, SerialTrafficController tc) { 015 super(systemName); 016 _knownState = UNKNOWN; 017 } 018 019 public SerialSensor(String systemName, SerialTrafficController tc, String userName) { 020 super(systemName, userName); 021 _knownState = UNKNOWN; 022 } 023 024 /** 025 * Request an update on status. 026 * <p> 027 * Since status is continually being updated, this isn't active now. 028 * Eventually, we may want to have this move the related AIU to the top of 029 * the polling queue. 030 */ 031 @Override 032 public void requestUpdateFromLayout() { 033 } 034 035} 036 037