# $Id$
##############################################################################
#
#     This file is part of fhem.
#
#     Fhem is free software: you can redistribute it and/or modify
#     it under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 2 of the License, or
#     (at your option) any later version.
#
#     Fhem is distributed in the hope that it will be useful,
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#     GNU General Public License for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with fhem.  If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

package main;

use strict;
use warnings;

use vars qw(%modules);
use vars qw(%defs);
use vars qw(%attr);
use vars qw($init_done);
use vars qw($lastDefChange);
sub Log($$);
sub Log3($$$);

use vars qw(%data);
use vars qw($FW_ME);
use vars qw($FW_wname);
use vars qw($FW_subdir);
use vars qw(%FW_hiddenroom);
use vars qw(%FW_visibleDeviceHash);
use vars qw(%FW_webArgs); # all arguments specified in the GET

my @mapping_attrs = qw( commands:textField-long mapping:textField-long nameIcon:textField-long cellStyle:textField-long nameStyle:textField-long valueColumn:textField-long valueColumns:textField-long valueFormat:textField-long valuePrefix:textField-long valueSuffix:textField-long valueIcon:textField-long valueStyle:textField-long );

sub readingsGroup_Initialize($)
{
  my ($hash) = @_;

  $hash->{DefFn}    = "readingsGroup_Define";
  $hash->{NotifyFn} = "readingsGroup_Notify";
  $hash->{UndefFn}  = "readingsGroup_Undefine";
  $hash->{SetFn}    = "readingsGroup_Set";
  $hash->{GetFn}    = "readingsGroup_Get";
  $hash->{AttrFn}   = "readingsGroup_Attr";
  $hash->{AttrList} = "disable:1,2,3 style timestampStyle ". join( " ", @mapping_attrs ) ." separator nolinks:1 noheading:1 nonames:1 notime:1 nostate:1 firstCalcRow:1,2,3,4 alwaysTrigger:1,2 sortDevices:1 sortFn visibility:hidden,hideable,collapsed,collapsible setList setFn:textField-long headerRows sortColumn";

  $hash->{FW_detailFn}  = "readingsGroup_detailFn";
  $hash->{FW_summaryFn}  = "readingsGroup_detailFn";

  $data{FWEXT}{"readingsGroup"}{SCRIPT} = "fhemweb_readingsGroup.js";

  $hash->{FW_atPageEnd} = 1;
}

sub
readingsGroup_updateDevices($;$)
{
  my ($hash,$def) = @_;
  $def = $hash->{helper}{DEF} if( !defined($def) );
  $hash->{helper}{DEF} = $def;
  $def = $hash->{DEF} if( !defined($def) );

  my %list;
  my %list2;
  my @devices;
  my @devices2;

  my @params = split(" ", $def);
  while (@params) {
    my $param = shift(@params);

    while ($param && $param =~ m/^</ && $param !~ m/>$/ ) {
      my $next = shift(@params);
      last if( !defined($next) );
      $param .= " ". $next;
    }

    # for backwards compatibility with weblink readings
    if( $param eq '*noheading' ) {
      $attr{$hash->{NAME}}{noheading} = 1;
      $hash->{DEF} =~ s/(\s*)\\$param((:\S+)?\s*)/ /g;
      $hash->{DEF} =~ s/^ //;
      $hash->{DEF} =~ s/ $//;
    } elsif( $param eq '*notime' ) {
      $attr{$hash->{NAME}}{notime} = 1;
      $hash->{DEF} =~ s/(\s*)\\$param((:\S+)?\s*)/ /g;
      $hash->{DEF} =~ s/^ //;
      $hash->{DEF} =~ s/ $//;
    } elsif( $param eq '*nostate' ) {
      $attr{$hash->{NAME}}{nostate} = 1;
      $hash->{DEF} =~ s/(\s*)\\$param((:\S+)?\s*)/ /g;
      $hash->{DEF} =~ s/^ //;
      $hash->{DEF} =~ s/ $//;
    } elsif( $param =~ m/^\{/) {
      $attr{$hash->{NAME}}{mapping} = $param ." ". join( " ", @params );
      $hash->{DEF} =~ s/\s*\{.*$//g;
      last;
    } else {
      my @device = split(":", $param, 2);               # 2 -> to allow : in calc expressions

      if( $device[1] && $device[1] =~ m/^FILTER=/ ) {
        my @device = split(":", $param);                # split all to get multiple FILTER but exclude the : before the readings
        my $devspec = shift(@device);
        while( @device && $device[0] =~ m/^FILTER=/ ) {
          $devspec .= ":";
          $devspec .= shift(@device);
        }
        my $regex =  join(':', @device);                # merge the rest back again
        foreach my $d (devspec2array($devspec)) {
          $list{$d} = 1;
          push @devices, [$d,$regex];
        }

      } elsif($device[0] =~ m/^<.*>$/) {
        push @devices, [$device[0]];

      } elsif($device[0] =~ m/(.*)=(.*)/) {
        my ($lattr,$re) = ($1, $2);
        foreach my $d (sort keys %defs) {
          next if( IsIgnored($d) );
          next if( !defined($defs{$d}{$lattr}) );
          next if( $lattr ne 'IODev' && $defs{$d}{$lattr} !~ m/^$re$/);
          next if( $lattr eq 'IODev' && $defs{$d}{$lattr}{NAME} && $defs{$d}{$lattr}{NAME} !~ m/^$re$/);
          $list{$d} = 1;
          push @devices, [$d,$device[1]];
        }

      } elsif($device[0] =~ m/(.*)&(.*)/) {
        my ($lattr,$re) = ($1, $2);
        foreach my $d (sort keys %attr) {
          next if( IsIgnored($d) );
          next if( !defined($attr{$d}{$lattr}) );
          next if( $attr{$d}{$lattr} !~ m/^$re$/);
          $list{$d} = 1;
          push @devices, [$d,$device[1]];
        }

      } elsif( defined($defs{$device[0]}) ) {
        $list{$device[0]} = 1;
        push @devices, [@device];

      } else {
        foreach my $d (sort keys %defs) {
          next if( IsIgnored($d) );
          eval { $d =~ m/^$device[0]$/ };
          if( $@ ) {
            Log3 $hash->{NAME}, 3, $hash->{NAME} .": ". $device[0] .": ". $@;
            push @devices, ["<<ERROR>>"];
            last;
          }
          next if( $d !~ m/^$device[0]$/);
          $list{$d} = 1;
          push @devices, [$d,$device[1]];
        }
      }
    }
  }

  foreach my $device (@devices) {
    my $regex = $device->[1];
    my @list = ('.*');
    @list = split(",",$regex) if( $regex );
    my $first = 1;
    my $multi = @list;
    for( my $i = 0; $i <= $#list; ++$i ) {
      my $regex = $list[$i];
      while ($regex
             && ( ($regex =~ m/^</ && $regex !~ m/>$/)           #handle , in <...>
                  || ($regex =~ m/@\{/ && $regex !~ m/\}$/)      #handle , in reading@{...}
                  || ($regex =~ m/^\$.*\(/ && $regex !~ m/\)/) ) #handle , in $<calc>(...)
             && defined($list[++$i]) ) {
        $regex .= ",". $list[$i];
      }

      next if( !$regex );

      if( $regex =~ m/^<.*>$/ ) {
      } elsif( $regex !~ m/^\$/ && $regex =~ m/(.*)@(.*)/ ) {
        $regex = $1;
        my $name = $2;

        next if( $regex && $regex =~ m/^\+(.*)/ );
        next if( $regex && $regex =~ m/^\?(.*)/ );

        if( $name =~ m/^\{(.*)\}$/s ) {
          my $DEVICE = $device->[0];
          $name = eval $name;
        }

        next if( !$name );
        next if( !defined($defs{$name}) );

        $list2{$name} = 1;

        @devices2 = @devices if( !@devices2 );

        my $found = 0;
        foreach my $device (@devices2) {

          $found = 1 if( $device->[0] eq $name && $device->[1] eq $regex );
          last if $found;
        }
        next if $found;

        push @devices2, [$name,$regex];
      }
    }
  }

  if( AttrVal( $hash->{NAME}, "sortDevices", 0 ) == 1 ) {
    @devices = sort { my $aa = @{$a}[0]; my $bb =  @{$b}[0];
                      $aa = "#" if( $aa =~ m/^</ );
                      $bb = "#" if( $bb =~ m/^</ );
                      lc(AttrVal($aa,"sortby",AttrVal($aa,"alias",$aa))) cmp
                      lc(AttrVal($bb,"sortby",AttrVal($bb,"alias",$bb))) } @devices;
  }

  $hash->{CONTENT} = \%list;
  $hash->{DEVICES} = \@devices;
  $hash->{CONTENT2} = \%list2;
  delete $hash->{DEVICES2};
  $hash->{DEVICES2} = \@devices2 if( @devices2 );

  $hash->{fhem}->{last_update} = gettimeofday();
  $hash->{fhem}->{lastDefChange} = $lastDefChange;
}

sub readingsGroup_Define($$)
{
  my ($hash, $def) = @_;

  my @args = split("[ \t]+", $def);

  return "Usage: define <name> readingsGroup <device>+"  if(@args < 3);

  my $name = shift(@args);
  my $type = shift(@args);

  $hash->{STATE} = 'Initialized';

  if( $init_done ) {
    readingsGroup_updateDevices($hash);
    $hash->{fhem}->{lastDefChange} = $lastDefChange+1;
    readingsGroup_inithtml($hash);
  }

  return undef;
}

sub readingsGroup_Undefine($$)
{
  my ($hash,$arg) = @_;

  return undef;
}

sub
rgVal2Num($)
{
  my ($val) = @_;

  return $val if( !defined($val) );

  #$val =~ s/[^-\.\d]//g if( defined($val) );
  $val = ($val =~ /(-?\d+(\.\d+)?)/ ? $1 : "");

  return $val;
}

sub
lookup($$$$$$$$$)
{
  my($mapping,$name,$alias,$reading,$value,$room,$group,$row,$default) = @_;

  if( $mapping ) {
    if( !ref($mapping) && $mapping =~ m/^\{.*\}$/s) {
      my $DEVICE = $name;
      my $READING = $reading;
      my $VALUE = $value;
      my $NUM = rgVal2Num($value);
      my $ROW = $row;
      my $m = eval $mapping;
      if( $@ ) {
        Log 2, $@ if( $@ );
      } else {
        $mapping = $m;
      }
    }

    if( ref($mapping) eq 'HASH' ) {
      $default = $mapping->{$name} if( defined($mapping->{$name}) );
      $default = $mapping->{$reading} if( defined($mapping->{$reading}) );
      $default = $mapping->{"$name.$reading"} if( defined($mapping->{"$name.$reading"}) );
      $default = $mapping->{"$reading.$value"} if( defined($mapping->{"$reading.$value"}) );
      $default = $mapping->{"$name.$reading.$value"} if( defined($mapping->{"$name.$reading.$value"}) );
    } else {
      $default = $mapping;
    }

    return $default if( !defined($default) );

    if( !ref($default) && $default =~ m/^\{.*\}$/s) {
      my $DEVICE = $name;
      my $READING = $reading;
      my $VALUE = $value;
      my $NUM = rgVal2Num($value);
      my $ROW = $row;
      $default = eval $default;
      $default = "" if( $@ );
      Log 2, $@ if( $@ );
    }

    return $default if( !defined($default) );

    $default =~ s/\%ALIAS/$alias/g;
    $default =~ s/\%DEVICE/$name/g;
    $default =~ s/\%READING/$reading/g;
    $default =~ s/\%VALUE/$value/g;
    $default =~ s/\%ROOM/$room/g;
    $default =~ s/\%GROUP/$group/g;
    $default =~ s/\%ROW/$row/g;

    $default =~ s/\$ALIAS/$alias/g;
    $default =~ s/\$DEVICE/$name/g;
    $default =~ s/\$READING/$reading/g;
    $default =~ s/\$VALUE/$value/g;
    $default =~ s/\$ROOM/$room/g;
    $default =~ s/\$GROUP/$group/g;
    $default =~ s/\$ROW/$row/g;
  }

  return $default;
}
sub
lookup2($$$$;$$)
{
  my($lookup,$name,$reading,$value,$row,$column) = @_;

  return "" if( !$lookup );

  if( !ref($lookup) && $lookup =~ m/^\{.*\}$/s) {
    my $DEVICE = $name;
    my $READING = $reading;
    my $VALUE = $value;
    my $NUM = rgVal2Num($value);
    my $ROW = $row;
    my $COLUMN = $column;
    my $l = eval $lookup;
    if( $@ ) {
      Log 2, $@ if( $@ );
    } else {
      $lookup = $l;
    }
  }

  if( ref($lookup) eq 'HASH' ) {
    my $vf = "";
    $vf = $lookup->{""} if( defined( $lookup->{""} ) );
    $vf = $lookup->{$reading} if( defined($reading) && exists($lookup->{$reading}) );
    $vf = $lookup->{"$name.$reading"} if( defined($reading) && exists($lookup->{"$name.$reading"}) );
    $vf = $lookup->{"$reading.$value"} if( defined($value) && exists($lookup->{"$reading.$value"}) );
    $vf = $lookup->{"$name.$reading.$value"} if( defined($value) && exists($lookup->{"$name.$reading.$value"}) );
    $vf = $lookup->{"r:$row"} if( defined($row) && exists($lookup->{"r:$row"}) );
    $vf = $lookup->{"c:$column"} if( defined($column) && exists($lookup->{"c:$column"}) );
    $vf = $lookup->{"r:$row,c:$column"} if( defined($row) && defined($column) && exists($lookup->{"r:$row,c:$column"}) );
    $lookup = $vf;
  }

  return undef if( !defined($lookup) );

  if( !ref($lookup) && $lookup =~ m/^\{.*\}$/s) {
    my $DEVICE = $name;
    my $READING = $reading;
    my $VALUE = $value;
    my $NUM = rgVal2Num($value);
    my $ROW = $row;
    my $COLUMN = $column;
    $lookup = eval $lookup;
    $lookup = "" if( $@ );
    Log 2, $@ if( $@ );
  }

  return undef if( !defined($lookup) );

  $lookup =~ s/\%DEVICE/$name/g;
  $lookup =~ s/\%READING/$reading/g;
  $lookup =~ s/\%VALUE/$value/g;

  $lookup =~ s/\$DEVICE/$name/g;
  $lookup =~ s/\$READING/$reading/g;
  $lookup =~ s/\$VALUE/$value/g;

  return $lookup;
}
sub
readingsGroup_makeLink($$$)
{
  my($v,$devStateIcon,$cmd) = @_;

  if( $cmd ) {
    my $txt = $v;
    $txt = $devStateIcon if( $devStateIcon );
    my $link = "cmd=$cmd";
    if( AttrVal($FW_wname, "longpoll", 1)) {
      $txt = "<a style=\"cursor:pointer\" onClick=\"FW_cmd('$FW_ME$FW_subdir?XHR=1&$link')\">$txt</a>";
    } else {
      my $fw_room = $FW_webArgs{room};
      $fw_room = "&detail=$FW_webArgs{detail}" if( $FW_webArgs{"detail"} );
      my $srf = $fw_room ? "&room=$fw_room" : "";
      $srf = $fw_room if( $fw_room && $fw_room =~ m/^&/ );
      $txt = "<a href=\"$FW_ME$FW_subdir?$link$srf\">$txt</a>";
    }
    if( !$devStateIcon ) {
      $v = $txt;
    } else {
      $devStateIcon = $txt;
    }
  }

  return ($v, $devStateIcon);
}


package readingsGroup;
sub
rgCount($$)
{
  my ($val,$values) = @_;

  my $count = 0;

  if( $val =~ m/^\/(.*)\/$/ ) {
    my $regex = $1;
    foreach my $v (@{$values}) {
      ++$count if( $v =~ m/$regex/ );
    }
  } elsif( $val =~ m/^!(.*)/ ) {
    my $val = $1;
    foreach my $v (@{$values}) {
      ++$count if( $v ne $val );
    }
  } else {
    foreach my $v (@{$values}) {
      ++$count if( $v eq $val );
    }
  }

  return $count;
}

use List::Util qw(min max sum);
sub
rgCalc($$$$)
{
  my ($hash,$calc,$cell_row,$cell_column) = @_;
  my $name = $hash->{NAME};

  return undef if( !defined($hash->{helper}{values}) );

  my $args;
  my $cells;
  # format: $<operator>[(<zellen>)][@<alias>]
  if( $calc =~ m/([^@\(]*)(\(([^\(]*)\))?(\(([^\(]*)\))?(@(.*))?/ ) {
    $calc = $1;
    $cells = $5;
    $args = $3 if( defined($cells) );
    $cells = $3 if( !defined($cells) );
  }

  my $firstCalcRow = main::AttrVal($name, "firstCalcRow", 1);

  $cells = '$firstCalcRow..$ROW-1' if( !$cells );

  my @values = ();
  foreach my $cell ( split( ';', $cells ) ) {
    my ($rows,$cols) = split( ':', $cell );
    $rows = '$firstCalcRow..$ROW-1' if( !$rows );
    $cols = $cell_column if( !defined($cols) );

    my $ROW = $cell_row;
    my $COLUMN = $cell_column;
    foreach my $col (eval "($cols)") {
      foreach my $row (eval "($rows)") {
        my $value = $hash->{helper}{values}{orig}[$col][$row];
        if( defined($value) && $value ne '-' ) {
          #$value =~ s/[^-\.\d]//g;
          push @values, $value;
        }

        if( ${hash}->{inDetailFn} ) {
          #FIXME: also add indirect cells
          $hash->{helper}{recalc}[$col][$row] .= "," if( $hash->{helper}{recalc}[$col][$row] );
          $hash->{helper}{recalc}[$col][$row] .= "$cell_row:$cell_column";
        }
      }
    }
  }

  if( $calc eq 'avg' ) {
    my $cnt = scalar @values;
    return undef if( !$cnt );
    return ( sum @values ) / $cnt;
  } elsif( $calc eq 'count' ) {
    return rgCount( $args, \@values );
  }

  return eval $calc .' @values';
}

package main;

sub
readingsGroup_value2html($$$$$$$$$)
{
  my ($hash,$calc,$name,$name2,$n,$v,$cell_row,$cell_column,$type) = @_;
  my $d = $hash->{NAME};

  my $informid = "informId=\"$d-$name.$n\"";

  my $value_orig = $v;
  if( $calc ) {
    $v = readingsGroup::rgCalc($hash,$calc,$cell_row,$cell_column);
    $hash->{helper}{values}{calc}[$cell_column][$cell_row] = $calc;

    $informid = "informId=\"$d-calc:$cell_row:$cell_column\"";

    $value_orig = $v;
    $v = "" if( !defined($v) );
  }

  my $value_format = lookup2($hash->{helper}{valueFormat},$name,$n,$v,$cell_row,$cell_column);
  return (undef) if( !defined($value_format) );
  if(  $value_format =~ m/%/ ) {
    $v = sprintf( $value_format, $v );
  } elsif( $value_format ne "" ) {
    $v = $value_format;
  }
  my $value_formated = $v;


  my $room = AttrVal($name2, "room", "");
  my $alias = AttrVal($name2, "alias", $name2);
  my $group = AttrVal($name2, "group", "");

  my $cmd;
  my $devStateIcon;
  if( my $value_icon = $hash->{helper}{valueIcon} ) {
    if( my $icon = lookup($value_icon,$name,$alias,$n,$value_formated,$room,$group,$cell_row,"") ) {
      if( $icon =~ m/^[\%\$]devStateIcon$/ ) {
        my %extPage = ();
        my ($allSets, $cmdlist, $txt) = FW_devState($name, $room, \%extPage);
        $devStateIcon = $txt;
      } else {
        $devStateIcon = FW_makeImage( $icon, $v, "icon" );
        $cmd = lookup2($hash->{helper}{commands},$name,$n,$icon);
        $cmd = lookup2($hash->{helper}{commands},$name,$n,$value_formated) if( !$cmd );
      }
    }
  }

  my $webCmdFn = 0;
  if( !$devStateIcon ) {
    $cmd = lookup2($hash->{helper}{commands},$name,$n,$value_formated);

    if( $cmd && $cmd =~ m/^([\w\/.-]*):(\S*)?(\s\S*)?$/ ) {
      my $set = $1;
      my $values = $2;
      $set .= $3 if( $3 );

      if( !$values ) {
        my %extPage = ();
        my ($allSets, undef, undef) = FW_devState($name, $room, \%extPage);
        $allSets = getAllAttr($name) if( $type && $type eq 'attr' );
        my ($set) = split( ' ', $set, 2 );
        if( $allSets && $allSets =~ m/\b$set:([^ ]*)/) {
          $values = $1;
        }
      }

      my $fw_room = $FW_webArgs{room};
      $fw_room = "&detail=$FW_webArgs{detail}" if( $FW_webArgs{"detail"} );

      my $htmlTxt;
      foreach my $fn (sort keys %{$data{webCmdFn}}) {
        no strict "refs";
        $htmlTxt = &{$data{webCmdFn}{$fn}}($FW_wname,$name,$fw_room,$set,$values);
        use strict "refs";
        last if(defined($htmlTxt));
      }

      if( $htmlTxt && $htmlTxt =~ m/^<td>(.*)<\/td>$/ ) {
         $htmlTxt = $1;
        }
      if( $htmlTxt && $htmlTxt =~ m/class='fhemWidget'/ ) {
        $htmlTxt =~ s/class='fhemWidget'/class='fhemWidget' informId='$d-$name.$n'/;
        $informid = "";

        my $txt = lookup($hash->{helper}{mapping},$name,$name,$n,"",$room,$group,$cell_row,undef);
        if( defined($txt) ) {
          $informid = "rg-fhemWidget-label=\"$txt\"";
        }
      }

      if( $htmlTxt ) {
        if( $type && $type eq 'attr' ) {
          my $current = AttrVal( $name, $n, 'unknown' );
          $htmlTxt =~ s/cmd=/type='attr' cmd=/;
          $htmlTxt =~ s/current='[^']*'/current='$current'/;
        }

        $v = $htmlTxt;
        $webCmdFn = 1;
      }
    }
  }
  ($v,$devStateIcon) = readingsGroup_makeLink($v,$devStateIcon,$cmd) if( !$webCmdFn );

  if( my $value_prefix = $hash->{helper}{valuePrefix} ) {
    if( my $value_prefix = lookup2($value_prefix,$name,$n,$value_formated) ) {
      $v = $value_prefix . $v;
      $devStateIcon = $value_prefix . $devStateIcon if( $devStateIcon );
    }
  }

  if( my $value_suffix = $hash->{helper}{valueSuffix} ) {
    if( my $value_suffix = lookup2($value_suffix,$name,$n,$value_formated) ) {
      $v .= $value_suffix;
      $devStateIcon .= $value_suffix if( $devStateIcon );
    }
  }
  my $value_prefix_suffix = $v;


  $hash->{helper}{values}{orig}[$cell_column][$cell_row] = $value_orig;
  $hash->{helper}{values}{formated}[$cell_column][$cell_row] = $value_formated;
  $hash->{helper}{values}{prefixsuffix}[$cell_column][$cell_row] = $value_prefix_suffix;

  my $value_style = lookup2($hash->{helper}{valueStyle},$name,$n,$value_orig,$cell_row,$cell_column);
  $v = "<div $value_style>$v</div>" if( $value_style && !$devStateIcon );

  return($informid,$v,$devStateIcon)
}
sub
readingsGroup_inithtml($)
{
  my($hash) = @_;

  if( $hash->{alwaysTrigger} && $hash->{alwaysTrigger} > 1 ) {
    ${hash}->{inDetailFn} = 1;
    readingsGroup_2html($hash);
    delete ${hash}->{inDetailFn};
  }
}
sub
readingsGroup_2html($;$)
{
  my($hash,$extPage) = @_;
  $hash = $defs{$hash} if( ref($hash) ne 'HASH' );

  $FW_ME = "" if( !$FW_ME );
  $FW_subdir = "" if( !$FW_subdir );

  return undef if( !$hash );
  return undef if( !$init_done );

  #if( $hash->{fhem}->{cached} && $hash->{fhem}->{lastDefChange} && $hash->{fhem}->{lastDefChange} == $lastDefChange ) {
  #  return $hash->{fhem}->{cached};
  #}

  my $def = $hash->{helper}{DEF};
  $def = $hash->{DEF} if( !defined($def) );

  if( $def && $def =~ m/=/
      || $hash->{fhem}->{lastDefChange} != $lastDefChange ) {
    if( !$hash->{fhem}->{last_update}
        || $hash->{fhem}->{lastDefChange} != $lastDefChange
        || gettimeofday() - $hash->{fhem}->{last_update} > 600 ) {
      readingsGroup_updateDevices($hash);
    }
  }

  delete( $hash->{helper}{recalc} );
  delete( $hash->{helper}{values} );
  delete( $hash->{helper}{positions} );

  my $d = $hash->{NAME};

  my $show_links = !AttrVal( $d, "nolinks", "0" );
  $show_links = 0 if($FW_hiddenroom{detail});

  my $show_heading = !AttrVal( $d, "noheading", "0" );
  my $show_names = !AttrVal($d, "nonames", "0" );

  my $disable = AttrVal($d,"disable", 0);
  if( AttrVal($d,"disable", 0) > 2 ) {
    return "";
  } elsif( AttrVal($d,"disable", 0) > 1 ) {
    my $ret;
    $ret .= "<table>";
    my $txt = AttrVal($d, "alias", $d);
    $txt = "<a href=\"$FW_ME$FW_subdir?detail=$d\">$txt</a>" if( $show_links );
    $ret .= "<tr><td><div class=\"devType\">$txt</a></div></td></tr>" if( $show_heading );
    $ret .= "<tr><td><table class=\"block wide\">";
    #$ret .= "<div class=\"devType\"><a style=\"color:#ff8888\" href=\"$FW_ME$FW_subdir?detail=$d\">readingsGroup $txt is disabled.</a></div>";
    $ret .= "<td><div style=\"color:#ff8888;text-align:center\">disabled</div></td>";
    $ret .= "</table></td></tr>";
    $ret .= "</table>";
    return $ret;
  }

  my $show_time = !AttrVal( $d, "notime", "0" );
  my $show_state = !AttrVal( $d, "nostate", "0" );

  my $separator = AttrVal( $d, "separator", ":" );

  my $style = AttrVal( $d, "style", "" );
  if( $style =~ m/^\{.*\}$/s ) {
    my $s = eval $style;
    $style = $s if( $s );
  }

  my $timestamp_style = AttrVal( $d, "timestampStyle", "" );

  my $header_rows = AttrVal( $d, 'headerRows', 0 );
  my $in_footer = 0;

  my $sort_column = AttrVal( $d, 'sortColumn', undef );

  my $devices = $hash->{DEVICES};

  my $group;
  $group = $extPage->{group} if( $extPage );
  $group = AttrVal( $d, "group", undef ) if( !$group );
  $group = "" if( !$group );
  $group =~ s/,/_/g;

  my $show_hide = "";
  my $visibility = AttrVal($d, "visibility", undef );
  if( !$FW_webArgs{"detail"} ) {
    if( $visibility && ( $visibility eq "hidden" || $visibility eq "hideable" ) ) {
      $style = 'style=""' if( !$style );
      $style =~ s/style=(.)/style=$1display:none;/ if( $visibility eq "hidden" );
      $show_hide .= "<a style=\"cursor:pointer\" onClick=\"FW_readingsGroupToggle('$d')\">&gt;</a>";
    }
  }

  my $row = 1;
  my $cell_row = 1;
  my $ret;
  $ret .= "<table>";
  my $txt = AttrVal($d, "alias", $d);
  $txt = "<a href=\"$FW_ME$FW_subdir?detail=$d\">$txt</a>" if( $show_links );
  $ret .= "<tr><td><div class=\"devType\">$show_hide&nbsp;$txt</div></td></tr>" if( $show_heading );
  $ret .= "<tr><td><table $style id='readingsGroup-$d'".
          (defined($sort_column)?" sortColumn=\"$sort_column\"":'').
          " groupId=\"$group\" class=\"block wide readingsGroup".
          (defined($sort_column)?' sortable':'') ."\">";
  $ret .= "<thead>" if( $header_rows );
  $ret .= "<tr><td colspan=\"99\"><div style=\"color:#ff8888;text-align:center\">updates disabled</div></tr>" if( $disable > 0 );

  foreach my $device (@{$devices}) {
    my $item = 0;
    my $h = $defs{$device->[0]};
    my $regex = $device->[1];
    if( !$h && $device->[0] =~ m/^<.*>$/ ) {
      $h = $hash if( !$h );
      $regex = $device->[0];
    }
    next if( !$h );
    my $name = $h->{NAME};  #FIXME: name/name2 confusion
    my $name2 = $h->{NAME};

    delete $hash->{groupedList};

    my @list = ('.*');
    @list = split(",",$regex) if( $regex );
    if( @list && $list[0] =~ m/^@(.*)/ ) {
      my $index = $1;
      my $regex = $list[$index];

      if( $regex && $regex =~ m/^r:(.*)/ ) {
        $regex = $1;
      }

      my @l;
      foreach my $n (keys %{$h->{READINGS}}) {
        eval { $n =~ m/^$regex$/ };
        if( $@ ) {
          Log3 $name, 3, $name .": ". $regex .": ". $@;
          last;
        }
        next if( $n !~ m/^$regex$/);
        push @l, [$n, $1, $2, $3, $4];
      }

      if( my $sortFn = AttrVal($d, "sortFn", '') ) {
        sub rgSortIP {
          return inet_aton(@{$a}[1]) cmp inet_aton(@{$b}[1]);
        };
        @l = eval "sort { $sortFn } \@l";
        if( $@ ) {
          $txt = "<ERROR>";
          Log3 $d, 3, $d .": ". $regex .": ". $@;
          next;
        }
      } else {
        sub rgSort {
          return @{$a}[1] cmp @{$b}[1];
        };
        @l = sort rgSort @l;
	  }

      $hash->{groupedList} = [];
      foreach my $n (@l) {
        my $cg1 = @{$n}[1]; my $cg2 = @{$n}[2]; my $cg3 = @{$n}[3]; my $cg4 = @{$n}[4];
        my @l = @list[1..@list-1];
        $l[$index-1] = @{$n}[0];
        s/#1/$cg1/ for @l; s/#2/$cg2/ for @l; s/#3/$cg3/ for @l; s/#4/$cg4/ for @l;
        push @{$hash->{groupedList}}, '<br2>' if( $hash->{groupedList} );
        push @{$hash->{groupedList}}, @l;
      }
      @list = @{$hash->{groupedList}} if( $hash->{groupedList} );
    }

    my $first = 1;
    my $multi = @list;
    my $cell_column = 1;
    for( my $i = 0; $i <= $#list; ++$i ) {
      my $name = $name;
      my $name2 = $name2;
      my $regex = $list[$i];
      while ($regex
             && ( ($regex =~ m/^</ && $regex !~ m/>$/)            #handle , in <...>
                  || ($regex =~ m/@\{/ && $regex !~ m/\}$/)       #handle , in reading@{...}
                  || ($regex =~ m/^\$.*\(/ && $regex !~ m/\)/) )  #handle , in $<calc>(...)
             && defined($list[++$i]) ) {
        $regex .= ",". $list[$i];
      }
      $item++;
      my $h = $h;
      my $type;
      my $force_show = 0;
      my $calc;
      my $format;
      if( $regex && $regex =~ m/^<(.*)>$/ ) {
        my $txt = $1;
        my $readings;
        if( $txt =~ m/^\{(.*)\}(@[\w\-|.*]+)?$/ ) {
          $txt = "{$1}";
          $readings = $2;

          my $new_line = $first;
          my $DEVICE = $name;
          ($txt,$new_line) = eval $txt;
          $first = $new_line if( defined($new_line) );
          if( $@ ) {
            $txt = "<ERROR>";
            Log3 $d, 3, $d .": ". $regex .": ". $@;
          }
          next if( !defined($txt) );
        }

        my $cell_style0 = lookup2($hash->{helper}{cellStyle},$name,$1,undef,$cell_row,0);
        my $cell_style = lookup2($hash->{helper}{cellStyle},$name,$1,undef,$cell_row,$cell_column);
        my $name_style = lookup2($hash->{helper}{nameStyle},$name,$1,undef,$cell_row,$cell_column);
        my $value_columns = lookup2($hash->{helper}{valueColumns},$name,$1,undef,$cell_row,$cell_column);

        my $row_style = lookup2($hash->{helper}{rowStyle},$name,$1,undef,$cell_row,undef);
        if( !$FW_webArgs{"detail"} ) {
          if( $visibility && $visibility eq "collapsed" && $txt ne '-' && $txt ne '+' && $txt ne '+-' ) {
            $row_style = 'style=""' if( !$row_style );
            $row_style =~ s/style=(.)/style=$1display:none;/;
          }
        }

        $row++ if( $txt eq 'br2' );
        if( $txt eq 'br' || $txt eq 'br2' ) {
          $ret .= sprintf("<tr class=\"%s\">", ($row-1&1)?"odd":"even");
          $ret .= "<td $value_columns><div $cell_style $name_style class=\"dname\"></div></td>" if( $show_names );
          $first = 0;
          ++$cell_row;
          $cell_column = 1;
          next;
        } elsif( $txt eq 'hr' ) {
          $ret .= sprintf("<tr $row_style class=\"%s\">", ($row&1)?"odd":"even");
          $row++;
          $ret .= "<td style='padding:0px' colspan='99'><hr/></td>";
          next;
        } elsif( $txt eq 'tfoot' ) {
          $ret .= "</tbody>" if( $header_rows && !$in_footer );
          $ret .= "<tfoot>" if( !$in_footer );
          $in_footer = 1;
          next;
        } elsif( $txt eq '-' || $txt eq '+' || $txt eq '+-' ) {
          my $collapsed = $visibility && ( $visibility eq "collapsed" ) && !$FW_webArgs{"detail"};

          my $id = '';
          if( ($txt eq '+' && !$collapsed)
              || ($txt eq '-' && $collapsed ) ) {
            $id = '';
            $row_style = 'style=""' if( !$row_style );
            $row_style =~ s/style=(.)/style=$1display:none;/;
          } elsif( $txt eq '+-' ) {
            if( $collapsed ) {
              $txt = '+';
            } else {
              $txt = '-';
            }
            $id = "id='plusminus'";
          } elsif( $txt ne '+' && $collapsed ) {
            $row_style = 'style=""' if( !$row_style );
            $row_style =~ s/style=(.)/style=$1display:none;/;
          }

          $ret .= sprintf("<tr $row_style class=\"%s\">", ($row-1&1)?"odd":"even") if( $first );
          if( $visibility && ( $visibility eq "collapsed" || $visibility eq "collapsible" ) ) {
            $ret .= "<td $value_columns><div $id style=\"cursor:pointer\" onClick=\"FW_readingsGroupToggle2('$d')\">$txt</div></td>";
          } else {
            $ret .= "<td $value_columns><div>$txt</div></td>";
          }
          $first = 0;
          ++$cell_column;
          next;
        } elsif( $txt && $txt =~ m/^%([^%]*)(%(.*))?/ ) {
          my $icon = $1;
          my $cmd = $3;
          $txt = FW_makeImage( $icon, $icon, "icon" );

          $cmd = lookup2($hash->{helper}{commands},$name,$d,$icon) if( !defined($cmd) );

          ($txt,undef) = readingsGroup_makeLink($txt,undef,$cmd);

          if( $first || $multi == 1 ) {
            $ret .= sprintf("<tr $row_style class=\"%s\">", ($row&1)?"odd":"even");
            $row++;
          }
        } elsif( $first || $multi == 1 ) {
          $ret .= sprintf("<tr $row_style class=\"%s\">", ($row&1)?"odd":"even");
          $row++;

          if( $h != $hash ) {
            my $a = AttrVal($name2, "alias", $name2);
            my $m = "$a";
            $m = $a if( $multi != 1 );
            $m = "" if( !$show_names );
            my $room = AttrVal($name2, "room", "");
            my $group = AttrVal($name2, "group", "");
            my $txt = lookup($hash->{helper}{mapping},$name2,$a,"","",$room,$group,$cell_row,$m);

            $ret .= "<td $value_columns><div $cell_style0 $name_style class=\"dname\">$txt</div></td>" if( $show_names );
          }
        } else {
          my $webCmdFn = 0;
          my $cmd = lookup2($hash->{helper}{commands},$name,$d,$txt);

          if( $cmd && $cmd =~ m/^([\w\/.-]*):(\S*)?(\s\S*)?$/ ) {
            my $set = $1;
            my $values = $2;
            $set .= $3 if( $3 );

            if( !$values ) {
              my %extPage = ();
              my ($allSets, undef, undef) = FW_devState($name, "", \%extPage);
              my ($set) = split( ' ', $set, 2 );
              if( $allSets && $allSets =~ m/\b$set:([^ ]*)/) {
                 $values = $1;
              }
            }

            my $fw_room = $FW_webArgs{room};
            $fw_room = "&detail=$FW_webArgs{detail}" if( $FW_webArgs{"detail"} );

            my $htmlTxt;
            foreach my $fn (sort keys %{$data{webCmdFn}}) {
              no strict "refs";
              $htmlTxt = &{$data{webCmdFn}{$fn}}($FW_wname,$name,$fw_room,$set,$values);
              use strict "refs";
              last if(defined($htmlTxt));
            }

            if( $htmlTxt && $htmlTxt =~ m/^<td>(.*)<\/td>$/ ) {
              $htmlTxt = $1;
             }

            if( $htmlTxt ) {
              $txt = $htmlTxt;
              $webCmdFn = 1;
            }
          }
          ($txt,undef) = readingsGroup_makeLink($txt,undef,$cmd) if( !$webCmdFn );
        }

        my $informid = "";
        $informid = "informId=\"$d-item:$cell_row:$item\"" if( $readings );
        $ret .= "<td $value_columns><div $cell_style $name_style $informid>$txt</div></td>";
        $first = 0;
        ++$cell_column;
        next;
      } else {
        if( $regex && $regex !~ m/^\$/ && $regex =~ m/(.*)@([!]?)(.*)/ ) {
          $regex = $1;
          my $force_device = $2;
          $name = $3;
          if( $name =~ m/^\{(.*)\}$/s ) {
            my $DEVICE = $device->[0];
            $name = eval $name;
          }
          next if( !$name );

          $h = $defs{$name};

          next if( !$h && !$force_device );
        }

        $force_show = 0;
        $type = undef;
        $calc = undef;
        $format = "";
        my $modifier = "";
        if( $regex ) {
          if( $regex =~ m/^([ira]):(.*)/ ) {
            $modifier = $1;
            $regex = $2;
          }

          if( $regex =~ m/^([+?!\$]*)(.*)/ ) {
            $modifier .= $1;
            $regex = $2;
          }

          if( $regex =~ m/^(.*):(t|sec|i|d|r|r\d)$/ ) {
            $regex = $1;
            $format = $2;
          }
        }

        if( $modifier =~ m/[i+]/ ) {
        } elsif( $modifier =~ m/[a?]/ ) {
          $type = 'attr';
          $h = $attr{$name};
        } else {
          $h = $h->{READINGS} if( $h );
        }

        if( $modifier =~ m/\$/ ) {
          $force_show = 1;
          $h = undef;
          $calc = $regex;
          $name = $d;
          # format: $<operator>[(<zellen>)][@<alias>]
          if( $calc =~ m/([^@\(]*)(\(([^\(]*)\))?(\(([^\(]*)\))?(@(.*))?/ ) {
            $regex = $7;
            $regex = $1 if( !defined($regex) );
          }
        }

        $force_show = 1 if( $modifier =~ m/\!/ );
      }

      my @keys = keys %{$h};
      push (@keys, $regex) if( $force_show && (!@keys || !defined($h->{$regex}) ) );
      foreach my $n (sort @keys) {
      #foreach my $n (sort keys %{$h}) {
        next if( $n =~ m/^\./);
        next if( $n eq "state" && !$show_state && (!defined($regex) || $regex ne "state") );
        if( defined($regex) ) {
          eval { $n =~ m/^$regex$/ };
          if( $@ ) {
            Log3 $name, 3, $name .": ". $regex .": ". $@;
            last;
          }
          next if( $n !~ m/^$regex$/);
        }
        my $val = $h->{$n};

        my ($v, $t);
        if(ref($val)) {
          next if( ref($val) ne "HASH" || !defined($val->{VAL}) );
          ($v, $t) = ($val->{VAL}, $val->{TIME});
          if( $format eq 't' || $format eq 'sec' ) {
            $v = $t;
            $v = time() - time_str2num($v) if($format eq 'sec');
          }
          $t = "" if(!$t);
          $t = "" if( $multi != 1 );
        } else {
          $v = $val;
          $v = $n if( !$val && $force_show );
        }

        if( $format =~ m/^[dir]/ ) {
          $v = rgVal2Num($v);
          $v = int($v) if( $format eq 'i' );
          $v = round($v, defined($1) ? $1 : 1) if($format =~ /^r(\d)?/);
        }

        $v = FW_htmlEscape($v);

        my($informid,$devStateIcon);
        ($informid,$v,$devStateIcon) = readingsGroup_value2html($hash,$calc,$name,$name2,$n,$v,$cell_row,$cell_column,$type);
        next if( !defined($informid) );
        #$informid = "informId=\"$d-item:$cell_row:$item\"" if( $format );
        $informid =~ s/"$/:$format"/ if( $format );

        my $cell_style0 = lookup2($hash->{helper}{cellStyle},$name,$n,$v,$cell_row,0);
        my $cell_style = lookup2($hash->{helper}{cellStyle},$name,$n,$v,$cell_row,$cell_column);
        my $name_style = lookup2($hash->{helper}{nameStyle},$name,$n,$v,$cell_row,$cell_column);
        #my $value_style = lookup2($hash->{helper}{valueStyle},$name,$n,$v,$cell_row,$cell_column);

        my $row_style = lookup2($hash->{helper}{rowStyle},$name,$n,$v,$cell_row,undef);
        if( !$FW_webArgs{"detail"} ) {
          if( $visibility && $visibility eq "collapsed" ) {
            $row_style = 'style=""' if( !$row_style );
            $row_style =~ s/style=(.)/style=$1display:none;/;
          }
        }


        my $value_columns = lookup2($hash->{helper}{valueColumns},$name,$n,$v);

        if( $first || $multi == 1 ) {
          $ret .= sprintf("<tr $row_style class=\"%s\">", ($row&1)?"odd":"even");
          $row++;

          if( $show_names ) {
            my $room = AttrVal($name2, "room", "");
            my $alias = AttrVal($name2, "alias", $name2);
            my $group = AttrVal($name2, "group", "");

            my $m = "$alias$separator$n";
            $m = $alias if( $multi != 1 );
            my $txt = lookup($hash->{helper}{mapping},$name2,$alias,($multi!=1?"":$n),$v,$room,$group,$cell_row,$m);

            if( my $name_icon = $hash->{helper}{nameIcon}  ) {
              if( my $icon = lookup($name_icon ,$name,$alias,$n,$v,$room,$group,$cell_row,"") ) {
                $txt = FW_makeImage( $icon, $txt, "icon" );
              }
            }

            $txt = "<div $cell_style0>$txt</div>" if( !$show_links );
            $txt = "<a $cell_style0 href=\"$FW_ME$FW_subdir?detail=$name\">$txt</a>" if( defined($txt) && $show_links );
            $ret .= "<td $value_columns><div $name_style class=\"dname\">$txt</div></td>" if( defined($txt) );
          }
        }

        my $value_column = lookup2($hash->{helper}{valueColumn},$name,$n,undef);
        if( $value_column && $multi ) {
          while ($cell_column < $value_column ) {
            $ret .= "<td></td>";
            ++$cell_column;
          }
        }

        $ret .= "<td $value_columns $informid>$devStateIcon</td>" if( $devStateIcon );
        $ret .= "<td $value_columns><div $cell_style $informid>$v</div></td>" if( !$devStateIcon );
        $ret .= "<td><div $timestamp_style informId=\"$d-$name.$n-ts\">$t</div></td>" if( $show_time && $t );

        if( !$calc ) {
          $hash->{helper}{positions}{"$name.$n"} .= "," if( $hash->{helper}{positions}{"$name.$n"} );
          $hash->{helper}{positions}{"$name.$n"} .= "$cell_row:$cell_column";
        }

        $first = 0;
        ++$cell_column;
      }
    }

    if( $cell_row == $header_rows ) {
      $ret .= "</thead>";
      $ret .= "<tbody>";
    }
    ++$cell_row;
  }
  $ret .= "</tbody>" if( $header_rows && !$in_footer );

  if( $disable > 0 ) {
    $ret .= "<tfoot>" if( !$in_footer );
    $in_footer = 1;
    $ret .= sprintf("<tr class=\"%s\">", ($row&1)?"odd":"even");
    $ret .= "<td colspan=\"99\"><div style=\"color:#ff8888;text-align:center\">updates disabled</div></td></tr>";
  }
  $ret .= "</tfoot>" if( $in_footer );
  $ret .= "</table></td></tr>";
  $ret .= "</table>";

  #$hash->{fhem}->{cached} = $ret;

  return $ret;
}
sub
readingsGroup_detailFn()
{
  my ($FW_wname, $d, $room, $extPage) = @_; # extPage is set for summaryFn.
  my $hash = $defs{$d};

  return undef if( ${hash}->{inDetailFn} );

  $hash->{mayBeVisible} = 1;

  ${hash}->{inDetailFn} = 1;
  my $html = readingsGroup_2html($d,$extPage);
  delete ${hash}->{inDetailFn};

  return $html;
}

sub
readingsGroup_Update($$$)
{
  my ($hash, $item, $value) = @_;
  my $name  = $hash->{NAME};

  $hash->{changed} = 1;

  if( $hash->{alwaysTrigger} ) {
    DoTrigger( $name, "$item: $value" );

  } else {
    foreach my $ntfy (values(%defs)) {
      next if(!$ntfy->{TYPE} ||
              $ntfy->{TYPE} ne "FHEMWEB" ||
              !$ntfy->{inform} ||
              !$ntfy->{inform}{devices}{$name} ||
              $ntfy->{inform}{type} ne "status");
      next if( !$ntfy->{inform}{devices}{$name} );
      if(!FW_addToWritebuffer($ntfy,
          FW_longpollInfo($ntfy->{inform}{fmt}, "$name-$item", $value, $value ) ."\n" )) {
        my $name = $ntfy->{NAME};
        Log3 $name, 4, "Closing connection $name due to full buffer in FW_Notify";
        TcpServer_Close($ntfy, 1);
      }
      if(!FW_addToWritebuffer($ntfy,
          FW_longpollInfo($ntfy->{inform}{fmt}, "$name-$item-ts", "", TimeNow() ) ."\n" )) {
        my $name = $ntfy->{NAME};
        Log3 $name, 4, "Closing connection $name due to full buffer in FW_Notify";
        TcpServer_Close($ntfy, 1);
      }
    }

  }

}

sub
readingsGroup_Notify($$)
{
  my ($hash,$dev) = @_;
  my $name  = $hash->{NAME};

  my $events = deviceEvents($dev,1);
  return if( !$events );

  if( grep(m/^INITIALIZED$/, @{$events}) ) {
    readingsGroup_updateDevices($hash);
    readingsGroup_inithtml($hash);
    return undef;
  } elsif( grep(m/^REREADCFG$/, @{$events}) ) {
    readingsGroup_updateDevices($hash);
    readingsGroup_inithtml($hash);
    return undef;
  }
  return if( !$init_done );

  return if( AttrVal($name,"disable", 0) > 0 );

  return if($dev->{TYPE} eq $hash->{TYPE});
  #return if($dev->{NAME} eq $name);

  my $devices = $hash->{DEVICES};
  $devices = $hash->{DEVICES2} if( $hash->{DEVICES2} );

  $hash->{changed} = 0;

  my %triggers = ();
  my $max = int(@{$events});
  for (my $i = 0; $i < $max; $i++) {
    my $s = $events->[$i];
    $s = "" if(!defined($s));

    if( $dev->{NAME} eq "global" && $s =~ m/^RENAMED ([^ ]*) ([^ ]*)$/) {
      my ($old, $new) = ($1, $2);
      if( defined($hash->{CONTENT}{$old}) ) {

        $hash->{DEF} =~ s/(^|\s+)$old((:\S+)?\s*)/$1$new$2/g;
      }
      readingsGroup_updateDevices($hash);
    } elsif( $dev->{NAME} eq "global" && $s =~ m/^DELETED ([^ ]*)$/) {
      my ($name) = ($1);

      if( defined($hash->{CONTENT}{$name}) ) {

        $hash->{DEF} =~ s/(^|\s+)$name((:\S+)?\s*)/ /g;
        $hash->{DEF} =~ s/^ //;
        $hash->{DEF} =~ s/ $//;
      }
      readingsGroup_updateDevices($hash);

    } elsif( $dev->{NAME} eq "global" && $s =~ m/^DEFINED ([^ ]*)$/) {
      readingsGroup_updateDevices($hash);

    } else {
      next if(AttrVal($name,"disable", undef));

      next if (!$hash->{CONTENT}->{$dev->{NAME}} && !$hash->{CONTENT2}->{$dev->{NAME}});

      if( $hash->{alwaysTrigger} ) {
      } elsif( !defined($hash->{mayBeVisible}) ) {
        Log3 $name, 5, "$name: not on any display, ignoring notify";
        return undef;
      } else {
        if( defined($FW_visibleDeviceHash{$name}) ) {
        } else {
          Log3 $name, 5, "$name: no longer visible, ignoring notify";
          delete( $hash->{mayBeVisible} );
          delete( $hash->{helper}{recalc} );
          delete( $hash->{helper}{values} );
          delete( $hash->{helper}{positions} );
          return undef;
        }
      }

      my ($reading,$value) = split(": ",$events->[$i], 2);
      next if( !defined($value) );
      next if( $reading =~ m/^\./);
      $reading = "" if( !defined($reading) );
      $value = "" if( !defined($value) );
      my $show_state = !AttrVal( $name, "nostate", "0" );

      my $cell_row = 0;
      foreach my $device (@{$devices}) {
        my $item = 0;
        ++$cell_row;
        my $h = $defs{@{$device}[0]};
        next if( !$h );
        next if( $dev->{NAME} ne $h->{NAME} );
        my $n = $h->{NAME};
        my $regex = @{$device}[1];
        my @list = ('.*');
        @list = split(",",$regex) if( $regex );

        if( $hash->{groupedList} ) {
          @list = @{$hash->{groupedList}};
        }

        for( my $i = 0; $i <= $#list; ++$i ) {
          my $regex = $list[$i];
          while ($regex
                 && ( ($regex =~ m/^</ && $regex !~ m/>$/)            #handle , in <...>
                      || ($regex =~ m/@\{/ && $regex !~ m/\}$/)       #handle , in reading@{...}
                      || ($regex =~ m/^\$.*\(/ && $regex !~ m/\)/) )  #handle , in $<calc>(...)
                 && defined($list[++$i]) ) {
            $regex .= ",". $list[$i];
          }
          ++$item;
          next if( $reading eq "state" && !$show_state && (!defined($regex) || $regex ne "state") );
          my $modifier = "";
          my $format = "";
          if( $regex  ) {
            if( $regex =~ m/^([ira]):(.*)/ ) {
              $modifier = $1;
              $regex = $2;
            }
            if( $regex && $regex =~ m/^([+?!\$]*)(.*)/ ) {
              $modifier = $1;
              $regex = $2;
            }
            next if( $modifier =~ m/[i+]/ );
            next if( $modifier =~ m/[a?]/ );

            if( $regex =~ m/^(.*):(t|sec|i|d|r|r\d)$/ ) {
              $regex = $1;
              $format = $2;
            }
          }


          my $calc = undef;
          if( $modifier =~ m/\$/ ) {
            $calc = $regex;
          }

          if( $regex && $regex =~ m/^<(.*)>$/ ) {
            my $txt = $1;
            my $readings;
            if( $txt =~ m/^\{(.*)\}(@([\w\-|.*]+))?$/ ) {
              $txt = "{$1}";
              $readings = $3;

              next if( !$readings );
              next if( $reading !~ m/^$readings$/);

              my $new_line;
              my $DEVICE = $n;
              ($txt,$new_line) = eval $txt;
              if( $@ ) {
                $txt = "<ERROR>";
                Log3 $name, 3, $name .": ". $regex .": ". $@;
              }
              $txt = "" if( !defined($txt) );

              if( $txt && $txt =~ m/^%([^%]*)(%(.*))?/ ) {
                my $icon = $1;
                my $cmd = $3;

                $cmd = lookup2($hash->{helper}{commands},$name,$n,$icon) if( !defined($cmd) );
                $txt = FW_makeImage( $icon, $icon, "icon" );
                ($txt,undef) = readingsGroup_makeLink($txt,undef,$cmd);
              }

              readingsGroup_Update( $hash, "item:$cell_row:$item", "<html>$txt</html>" );
            }

            next;
          }

          if( $regex ) {
            my $regex = $regex;
            $regex =~ s/\{/\\\{/g;
            $regex =~ s/\}/\\\}/g;
            next if( $reading !~ m/^$regex$/);
          }

          my $value = $value;
          if( $format eq 't' || $format eq 'sec' ) {
            $value = TimeNow();
            $value = time() - time_str2num($value) if($format eq 'sec');
          } elsif( $format =~ m/^[dir]/ ) {
            $value = rgVal2Num($value);
            $value = int($value) if( $format eq 'i' );
            $value = round($value, defined($1) ? $1 : 1) if($format =~ /^r(\d)?/);
          }

          my $value_style = lookup2($hash->{helper}{valueStyle},$n,$reading,$value);

          my $value_orig = $value;
          if( my $value_format = $hash->{helper}{valueFormat} ) {
            my $value_format = lookup2($hash->{helper}{valueFormat},$n,$reading,$value);

            if( !defined($value_format) ) {
              $value = "";
            } elsif( $value_format =~ m/%/ ) {
              $value = sprintf( $value_format, $value );
            } elsif( $value_format ne "" ) {
              $value = $value_format;
            }
          }
          my $value_formated = $value;

          my $cmd;
          my $devStateIcon;
          if( my $value_icon = $hash->{helper}{valueIcon} ) {
            my $alias = AttrVal($n, "alias", $n);
            my $room = AttrVal($n, "room", "");
            my $group = AttrVal($n, "group", "");
            if( my $icon = lookup($value_icon,$n,$alias,$reading,$value,$room,$group,1,"") ) {
              if( $icon eq "%devStateIcon" ) {
                my %extPage = ();
                my ($allSets, $cmdlist, $txt) = FW_devState($n, $room, \%extPage);
                $devStateIcon = $txt;
              } else {
                $devStateIcon = FW_makeImage( $icon, $value, "icon" );
                $cmd = lookup2($hash->{helper}{commands},$n,$reading,$icon);
                $cmd = lookup2($hash->{helper}{commands},$n,$reading,$value) if( !$cmd );
              }
            }

            if( $devStateIcon ) {
              (undef,$devStateIcon) = readingsGroup_makeLink(undef,$devStateIcon,$cmd);

              if( $hash->{helper}{valuePrefix} ) {
                if( my $value_prefix = lookup2($hash->{helper}{valuePrefix},$n,$reading,$value) ) {
                  $devStateIcon = $value_prefix . $devStateIcon if( $devStateIcon );
                }
              }

              if( $hash->{helper}{valueSuffix} ) {
                if( my $value_suffix = lookup2($hash->{helper}{valueSuffix},$n,$reading,$value) ) {
                  $devStateIcon .= $value_suffix if( $devStateIcon );
                }
              }

              readingsGroup_Update( $hash, "$n.$reading", "<html>$devStateIcon</html>" );
              next;
            }
          }

          $cmd = lookup2($hash->{helper}{commands},$n,$reading,$value);
          if( $cmd && $cmd =~ m/^(\w.*):(\S.*)?$/ ) {
            if( $reading eq "state" ) {
              readingsGroup_Update( $hash, $n, $value );
            } else {
              readingsGroup_Update( $hash, "$n.$reading", $value );
            }
            next;
          }

          ($value,undef) = readingsGroup_makeLink($value,undef,$cmd);

          if( $hash->{helper}{valuePrefix} ) {
            if( my $value_prefix = lookup2($hash->{helper}{valuePrefix},$n,$reading,$value) ) {
              $value = $value_prefix . $value;
              $devStateIcon = $value_prefix . $devStateIcon if( $devStateIcon );
            }
          }
          my $value_prefix_suffix = $value;

          if( $hash->{helper}{valueSuffix} ) {
            if( my $value_suffix = lookup2($hash->{helper}{valueSuffix},$n,$reading,$value) ) {
              $value .= $value_suffix;
              $devStateIcon .= $value_suffix if( $devStateIcon );
            }
          }

          $value = "<div $value_style>$value</div>" if( $value_style );

          #FIXME: create {'$n.$reading'} = $value hash to avaid multiple events and calculations if same reading is included multiple times
          if( $format ) {
            $triggers{"$n.$reading:$format"} = $value;
          } else {
            $triggers{"$n.$reading"} = $value;
          }

          if( my $cells = $hash->{helper}{positions}{"$n.$reading"} ) {
            foreach my $cell ( split( ',', $cells ) ) {
              my ($cell_row,$cell_column) = split( ':', $cell );
              $hash->{helper}{values}{orig}[$cell_column][$cell_row] = $value_orig;
              $hash->{helper}{values}{formated}[$cell_column][$cell_row] = $value_formated;
              $hash->{helper}{values}{prefixsuffix}[$cell_column][$cell_row] = $value_prefix_suffix;
            }
          }

        }
      }
    }
  }

  our %readings;
  foreach my $trigger (keys %triggers) {
    readingsGroup_Update( $hash, $trigger, "<html>$triggers{$trigger}</html>" );

    our $count = 0;
    sub updateRefs($$);
    sub
    updateRefs($$)
    {
      my( $hash, $refs ) = @_;
      my $name  = $hash->{NAME};

      if( ++$count > 20 ) {
        Log3 $name, 2, "$name: recursionDetected: $refs";
        return;
      }

      foreach my $ref ( split( ',', $refs ) ) {
        my ($row,$col) = split( ':', $ref );

        my $calc = $hash->{helper}{values}{calc}[$col][$row];

        my $func = $calc;
        # format: $<operator>[(<zellen>)][@<alias>]
        if( $calc =~ m/([^@\(]*)(\(([^\(]*)\))?(\(([^\(]*)\))?(@(.*))?/ ) {
          $func = $7;
          $func = $1 if( !defined($func) );
        }
        my($informid,$v,$devStateIcon) = readingsGroup_value2html($hash,$calc,$name,$name,$func,$func,$row,$col,undef);
        $v = "" if( !defined($v) );

        readingsGroup_Update( $hash, "calc:$row:$col", "<html>$v</html>" );

        $readings{$func} = $hash->{helper}{values}{formated}[$col][$row];

        if( my $refs = $hash->{helper}{recalc}[$col][$row] ) {
          updateRefs( $hash, $refs );
        }
      }

      --$count;
    }

    if( my $cells = $hash->{helper}{positions}{$trigger} ) {
      foreach my $cell ( split( ',', $cells ) ) {
        my ($cell_row,$cell_column) = split( ':', $cell );
        if( my $refs = $hash->{helper}{recalc}[$cell_column][$cell_row] ) {
          updateRefs( $hash, $refs );
        }
      }
    }

  }

  return undef if( !$hash->{changed} );
  delete $hash->{changed};


  if( $hash->{alwaysTrigger} && $hash->{alwaysTrigger} > 1 ) {
    readingsBeginUpdate($hash);
    foreach my $key ( keys %readings ) {
      if( defined($readings{$key}) ) {
        readingsBulkUpdate($hash, $key, $readings{$key}, 1); #if( !defined($hash->{helper}{$key}) || $hash->{helper}{$key} ne $readings{$key} );
        $hash->{helper}{$key} = $readings{$key};
      }
    }
    readingsEndUpdate($hash,1);
  }


  if( %triggers ) {
    my $sort_column = AttrVal( $hash, 'sortColumn', undef );
    readingsGroup_Update( $hash, "sort", $sort_column ) if( defined($sort_column) )
  }

  return undef;
}

sub
readingsGroup_Set($@)
{
  my ($hash, $name, $cmd, $param, @a) = @_;

  my $list = "visibility:toggle,toggle2,show,hide";

  if( $cmd eq "refresh" ) {
    readingsGroup_updateDevices($hash);
    return undef;
  } elsif( $cmd eq "visibility" ) {
    readingsGroup_updateDevices($hash);
    readingsGroup_Update( $hash, "visibility", $param );
    return undef;
  }

  if( my $setList = AttrVal($name, "setList", undef) ) {
    $list .= " ". $setList;

    return "Unknown argument $cmd, choose one of $list" if( $cmd eq '?' );

    foreach my $set (split(" ", $setList)) {
      if( "$set " =~ m/^${cmd}[ :]/ ) {

        my $v = join(" ", @a);
        my $set_fn = AttrVal( $hash->{NAME}, "setFn", "" );
        if( $set_fn =~ m/^\{.*\}$/s ) {
          my $CMD = $cmd;
          my $ARGS = $param ." ". join(" ", @a);

          my $set_fn = eval $set_fn;
          Log3 $name, 3, $name .": setFn: ". $@ if($@);

          return $set_fn;
        }
      }
    }

  }

  return "Unknown argument $cmd, choose one of $list";
}

sub
readingsGroup_Get($@)
{
  my ($hash, @a) = @_;

  my $name = $a[0];
  return "$name: get needs at least one parameter" if(@a < 2);

  my $cmd= $a[1];

  my $ret = "";
  if( $cmd eq "html" ) {
    return readingsGroup_2html($hash);
  }

  return undef;
  return "Unknown argument $cmd, choose one of html:noArg";
}

sub
readingsGroup_Attr($$$;$)
{
  my ($cmd, $name, $attrName, $attrVal) = @_;
  my $orig = $attrVal;

  if( $attrName eq "alwaysTrigger" ) {
    my $hash = $defs{$name};
    #$attrVal = 1 if($attrVal);

    if( $cmd eq "set" ) {
      $hash->{alwaysTrigger} = $attrVal;
    } else {
      delete $hash->{alwaysTrigger};
    }

    readingsGroup_inithtml($hash);

  } elsif( grep { $_ =~ m/$attrName(:.*)?/ }  @mapping_attrs ) {
    my $hash = $defs{$name};

    if( $cmd eq "set" ) {
      my $attrVal = $attrVal;

      my %specials= (
        "%DEVICE" => $name,
        "%READING" => $name,
        "%VALUE" => "1",
        "%NUM" => "1",
        "%ROW" => "1",
        "%COLUMN" => "1",
      );

      my $err = perlSyntaxCheck($attrVal, %specials);
      return $err if($err);

      if( $attrVal =~ m/^\{.*\}$/s && $attrVal =~ m/=>/ && $attrVal !~ m/\$/ ) {

        my $av = eval $attrVal;
        if( $@ ) {
          Log3 $hash->{NAME}, 3, $hash->{NAME} .": ". $@;
        } else {
          $attrVal = $av if( ref($av) eq "HASH" );
        }
      }
      $hash->{helper}{$attrName} = $attrVal;
    } else {
      delete $hash->{helper}{$attrName};
    }

  } elsif( $attrName eq "sortDevices" ) {
    if( $cmd eq "set" ) {
      $attrVal = 1 if($attrVal);
      $attr{$name}{$attrName} = $attrVal;
    } else {
      delete $attr{$name}{$attrName};
    }

    my $hash = $defs{$name};
    readingsGroup_updateDevices($hash);
  }

  if( $cmd eq "set" ) {
    if( $orig ne $attrVal ) {
      $attr{$name}{$attrName} = $attrVal;
      return $attrName ." set to ". $attrVal;
    }
  }

  return;
}

1;

=pod
=item helper
=item summary    display a formated collection of readings from devices
=item summary_DE Stellt eine formatierte Darstellung aus Readings von Ger&auml;te bereit
=begin html

<a name="readingsGroup"></a>
<h3>readingsGroup</h3>
<ul>
  Displays a collection of readings from on or more devices.

  <br><br>
  <a name="readingsGroup_Define"></a>
  <b>Define</b>
  <ul>
    <code>define &lt;name&gt; readingsGroup &lt;device&gt;[:regex] [&lt;device-2&gt;[:regex-2]] ... [&lt;device-n&gt;[:regex-n]]</code><br>
    <br>

    Notes:
    <ul>
      <li>&lt;device&gt; can be of the form INTERNAL=VALUE where INTERNAL is the name of an internal value and VALUE is a regex.</li>
      <li>&lt;device&gt; can be of the form ATTRIBUTE&amp;VALUE where ATTRIBUTE is the name of an attribute and VALUE is a regex.</li>
      <li>&lt;device&gt; can be of the form &lt;STRING&gt; or &lt;{perl}&gt; where STRING or the string returned by perl is
          inserted as a line in the readings list. skipped if STRING is undef.</li>
      <li>&lt;device&gt; can be a devspec (see <a href="#devspec">devspec</a>) with at least one FILTER expression.</li>
      <li>If regex is a comma separatet list the reading values will be shown on a single line.</li>
      <li>If regex starts with a '+' it will be matched against the internal values of the device instead of the readings.</li>
      <li>If regex starts with a '?' it will be matched against the attributes of the device instead of the readings.</li>
      <li>If regex starts with a '!' the display of the value will be forced even if no reading with this name is available.</li>
      <li>If regex starts with a '$' the calculation with value columns and rows is possible.</li>
      <li>The following <a href="#set">"set magic"</a> prefixes and suffixes can be used with regex:
         <ul>
           <li>You can use an i:, r: or a: prefix instead of + and ? analogue to the devspec filtering.</li>
           <li>The suffix :d retrieves the first number.</li>
           <li>The suffix :i retrieves the integer part of the first number.</li>
           <li>The suffix :r&lt;n&gt; retrieves the first number and rounds it to &lt;n&gt; decimal places. If &lt;n&gt; is missing, then rounds it to one decimal place.</li>
           <li>The suffix :t returns the timestamp (works only for readings).</li>
           <li>The suffix :sec returns the number of seconds since the reading was set. probably not realy usefull with readingsGroups.</li>
         </ul></li>
      <li>regex can be of the form &lt;regex&gt;@device to use readings from a different device.<br>
          if the device name part starts with a '!' the display will be foreced.
          use in conjunction with ! in front of the reading name.</li>
      <li>regex can be of the form &lt;regex&gt;@{perl} to use readings from a different device.</li>
      <li>regex can be of the form &lt;STRING&gt; or &lt;{perl}[@readings]&gt; where STRING or the string returned by perl is
          inserted as a reading or:
          <ul><li>the item will be skipped if STRING is undef</li>
              <li>if STRING is br a new line will be started</li>
              <li>if STRING is hr a horizontal line will be inserted</li>
              <li>if STRING is tfoot the table footer is started</li>
              <li>if STRING is of the form %ICON[%CMD] ICON will be used as the name of an icon instead of a text and CMD
                  as the command to be executed if the icon is clicked. also see the commands attribute.</li></ul>
          if readings is given the perl expression will be reevaluated during longpoll updates.</li>
      <li>If the first regex is '@&lt;index&gt;' it gives the index of the following regex by which the readings
          are to be grouped. if capture groups are used they can be refferenced by #&lt;number&gt;. eg:<br><ul>
          <code>&lt;IP-Adress&gt;&lt;Hostname&gt;&lt;MAC&gt;&lt;Vendor&gt;<br>
          nmap:@2,<#1>,(.*)_hostname,#1_macAddress,#1_macVendor</code></ul></li>
      <li>For internal values and attributes longpoll update is not possible. Refresh the page to update the values.</li>
      <li>the &lt;{perl}&gt; expression is limited to expressions without a space. it is best just to call a small sub
          in 99_myUtils.pm instead of having a compex expression in the define.</li>
    </ul><br>

    Examples:
    <ul>
      <code>
        define batteries readingsGroup .*:battery</code><br>
      <br>
        <code>define temperatures readingsGroup s300th.*:temperature</code><br>
        <code>define temperatures readingsGroup TYPE=CUL_WS:temperature</code><br>
      <br>
        <code>define culRSSI readingsGroup cul_RSSI=.*:+cul_RSSI</code><br>
      <br>
        <code>define heizung readingsGroup t1:temperature t2:temperature t3:temperature<br>
        attr heizung notime 1<br>
        attr heizung mapping {'t1.temperature' => 'Vorlauf', 't2.temperature' => 'R&amp;uuml;cklauf', 't3.temperature' => 'Zirkulation'}<br>
        attr heizung style style="font-size:20px"<br>
      <br>
        define systemStatus readingsGroup sysstat<br>
        attr systemStatus notime 1<br>
        attr systemStatus nostate 1<br>
        attr systemStatus mapping {'load' => 'Systemauslastung', 'temperature' => 'Systemtemperatur in &amp;deg;C'}<br>
      <br>
        define Verbrauch readingsGroup TYPE=PCA301:state,power,consumption<br>
        attr Verbrauch mapping %ALIAS<br>
        attr Verbrauch nameStyle style="font-weight:bold"<br>
        attr Verbrauch style style="font-size:20px"<br>
        attr Verbrauch valueFormat {power => "%.1f W", consumption => "%.2f kWh"}<br>
        attr Verbrauch valueIcon { state => '%devStateIcon' }<br>
        attr Verbrauch valueStyle {($READING eq "power" && $VALUE > 150)?'style="color:red"':'style="color:green"'}<br>
      <br>
        define rg_battery readingsGroup TYPE=LaCrosse:[Bb]attery<br>
        attr rg_battery alias Batteriestatus<br>
        attr rg_battery commands { "battery.low" => "set %DEVICE replaceBatteryForSec 60" }<br>
        attr rg_battery valueIcon {'battery.ok' => 'batterie', 'battery.low' => 'batterie@red'}<br>
      <br>
        define rgMediaPlayer readingsGroup myMediaPlayer:currentTitle,<>,totaltime,<br>,currentAlbum,<>,currentArtist,<br>,volume,<{if(ReadingsVal($DEVICE,"playStatus","")eq"paused"){"%rc_PLAY%set+$DEVICE+play"}else{"%rc_PAUSE%set+$DEVICE+pause"}}@playStatus>,playStatus<br>
        attr rgMediaPlayer commands { "playStatus.paused" => "set %DEVICE play", "playStatus.playing" => "set %DEVICE pause" }<br>
        attr rgMediaPlayer mapping &nbsp;<br>
        attr rgMediaPlayer notime 1<br>
        attr rgMediaPlayer valueFormat { "volume" => "Volume: %i" }<br>
        #attr rgMediaPlayer valueIcon { "playStatus.paused" => "rc_PLAY", "playStatus.playing" => "rc_PAUSE" }<br>
      </code><br>
    </ul>
  </ul><br>

  <a name="readingsGroup_Set"></a>
    <b>Set</b>
    <ul>
      <li>hide<br>
      will hide all visible instances of this readingsGroup</li>
      <li>show<br>
      will show all visible instances of this readingsGroup</li>
      <li>toggle<br>
      will toggle the hidden/shown state of all visible instances of this readingsGroup</li>
      <li>toggle2<br>
      will toggle the expanded/collapsed state of all visible instances of this readingsGroup</li>
    </ul><br>

  <a name="readingsGroup_Get"></a>
    <b>Get</b>
    <ul>
    </ul><br>

  <a name="readingsGroup_Attr"></a>
    <b>Attributes</b>
    <ul>
      <li>alwaysTrigger<br>
        1 -> always trigger update events. even if not visible.<br>
        2 -> trigger events for calculated values.</li><br>
      <li>disable<br>
        1 -> disable notify processing and longpoll updates. Notice: this also disables rename and delete handling.<br>
        2 -> also disable html table creation<br>
        3 -> also disable html creation completely</li><br>
      <li>sortDevices<br>
        1 -> sort the device lines alphabetically. use the first of sortby or alias or name that is defined for each device.</li>
      <li>noheading<br>
        If set to 1 the readings table will have no heading.</li><br>
      <li>nolinks<br>
        Disables the html links from the heading and the reading names.</li><br>
      <li>nostate<br>
        If set to 1 the state reading is excluded.</li><br>
      <li>nonames<br>
        If set to 1 the reading name / row title is not displayed.</li><br>
      <li>notime<br>
        If set to 1 the reading timestamp is not displayed.</li><br>
      <li>mapping<br>
        Can be a simple string or a perl expression enclosed in {} that returns a hash that maps reading names
        to the displayed name. The keys can be either the name of the reading or &lt;device&gt;.&lt;reading&gt; or
        &lt;reading&gt;.&lt;value&gt; or &lt;device&gt;.&lt;reading&gt;.&lt;value&gt;.
        %DEVICE, %ALIAS, %ROOM, %GROUP, %ROW and %READING are replaced by the device name, device alias, room attribute,
        group attribute and reading name respectively. You can also prefix these keywords with $ instead of %. Examples:<br>
          <code>attr temperatures mapping $DEVICE-$READING</code><br>
          <code>attr temperatures mapping {temperature => "%DEVICE Temperatur"}</code>
        </li><br>
      <li>separator<br>
        The separator to use between the device alias and the reading name if no mapping is given. Defaults to ':'
        a space can be enteread as <code>&amp;nbsp;</code></li><br>
      <li>setList<br>
        Space separated list of commands, which will be returned upon "set name ?",
        so the FHEMWEB frontend can construct a dropdown and offer on/off switches.
        set commands not in this list will be rejected.</li><br>
      <li>setFn<br>
        perl expresion that will be executed for the commands from the setList.
        has access to $CMD and $ARGS.</li><br>
      <li>style<br>
        Specify an HTML style for the readings table, e.g.:<br>
          <code>attr temperatures style style="font-size:20px"</code></li><br>
      <li>cellStyle<br>
        Specify an HTML style for a cell of the readings table. regular rows and colums are counted starting with 1,
        the row headings are column number 0. perl code has access to $ROW and $COLUMN. keys for hash lookup can be
        r:#, c:# or r:#,c:# , e.g.:<br>
          <code>attr temperatures cellStyle { "c:0" => 'style="text-align:right"' }</code></li><br>
      <li>nameStyle<br>
        Specify an HTML style for the reading names, e.g.:<br>
          <code>attr temperatures nameStyle style="font-weight:bold"</code></li><br>
      <li>valueStyle<br>
        Specify an HTML style for the reading values, e.g.:<br>
          <code>attr temperatures valueStyle style="text-align:right"</code></li><br>
      <li>valueColumn<br>
        Specify the minimum column in which a reading should appear. <br>
          <code>attr temperatures valueColumn { temperature => 2 }</code></li><br>
      <li>valueColumns<br>
        Specify an HTML colspan for the reading values, e.g.:<br>
          <code>attr wzReceiverRG valueColumns { eventdescription => 'colspan="4"' }</code></li><br>
      <li>valueFormat<br>
        Specify an sprintf style format string used to display the reading values. If the format string is undef
        this reading will be skipped. Can be given as a string, a perl expression returning a hash or a perl
        expression returning a string, e.g.:<br>
          <code>attr temperatures valueFormat %.1f &deg;C</code><br>
          <code>attr temperatures valueFormat { temperature => "%.1f &deg;C", humidity => "%i %%" }</code><br>
          <code>attr temperatures valueFormat { ($READING eq 'temperature')?"%.1f &deg;C":undef }</code></li><br>
      <li>valuePrefix<br>
        text to be prepended to the reading value</li><br>
      <li>valueSuffix<br>
        text to be appended after the reading value<br>
          <code>attr temperatures valueFormat { temperature => "%.1f", humidity => "%i" }</code><br>
          <code>attr temperatures valueSuffix { temperature => "&deg;C", humidity => " %" }</code></li><br>
      <li>nameIcon<br>
        Specify the icon to be used instead of the reading name. Can be a simple string or a perl expression enclosed
        in {} that returns a hash that maps reading names to the icon name. e.g.:<br>
          <code>attr devices nameIcon $DEVICE</code></li><br>
      <li>valueIcon<br>
        Specify an icon to be used instead of the reading value. Can be a simple string or a perl expression enclosed
        in {} that returns a hash that maps reading value to the icon name. e.g.:<br>
          <code>attr devices valueIcon $VALUE</code><br>
          <code>attr devices valueIcon {state => '%VALUE'}</code><br>
          <code>attr devices valueIcon {state => '%devStateIcon'}</code><br>
          <code>attr rgMediaPlayer valueIcon { "playStatus.paused" => "rc_PLAY", "playStatus.playing" => "rc_PAUSE" }</code></li><br>
      <li>commands<br>
        Can be used in to different ways:
        <ul>
        <li>To make a reading or icon clickable by directly specifying the command that should be executed. eg.:<br>
        <code>attr rgMediaPlayer commands { "playStatus.paused" => "set %DEVICE play", "playStatus.playing" => "set %DEVICE pause" }</code></li>
        <li>Or if the mapped command is of the form &lt;command&gt;:[&lt;modifier&gt;] then the normal <a href="#FHEMWEB">FHEMWEB</a>
        webCmd widget for &lt;modifier&gt; will be used for this command. if &lt;modifier&gt; is omitted then the FHEMWEB lookup mechanism for &lt;command&gt; will be used. eg:<br>
        <code>attr rgMediaPlayer commands { volume => "volume:slider,0,1,100" }</code><br>
        <code>attr lights commands { pct => "pct:", dim => "dim:" }</code></li>
        <li>commands can be used for attribtues. eg:<br>
        <code>attr <rg> commands { disable => "disable:" }</code></li>
        </ul></li><br>
      <li>visibility<br>
        if set to hidden or hideable will display a small button to the left of the readingsGroup name to expand/hide the contents of the readingsGroup. if a readingsGroup is expanded then all others in the same group will be hidden.<br>
        <ul>
        hidden -> default state is hidden but can be expanded<br>
        hideable -> default state is visible but can be hidden<br><br>
        </ul>
        if set to collapsed or collapsible readingsGroup will recognise the specials &lt;-&gt;,&lt;+&gt; and &lt;+-&gt; as the first elements of
        a line to add a + or - symbol to this line. clicking on the + or - symbol will toggle between expanded and collapsed state. if a readingsGroup is expanded then all others in the same group will be collapsed.
        <ul>
        - -> line will be visible in expanded state<br>
        + -> line will be visible in collapsed state<br>
        +- -> line will be visible in both states<br>
        <br>
        collapsed -> default state is collapsed but can be expanded<br>
        collapsible -> default state is visible but can be collapsed </li>
        </ul>
        <li>headerRows<br>
        </li>
        <li>sortColumn<br>
          &gt; 0 -> automatically sort the table by this column after page loading
          0 -> do not sort automatically but allow sorting of the table by clicking on a column header
          &lt; 0 -> automatically sort the table in reverse by this column after page loading
        </li>
        <br><li><a href="#perlSyntaxCheck">perlSyntaxCheck</a></li>
    </ul><br>

      For the hash version of all mapping attributes it is possible to give a default value
      with <code>{ '' => &lt;default&gt; }</code>.<br><br>

      The style attributes can also contain a perl expression enclosed in {} that returns the style
      string to use. For nameStyle and valueStyle The perl code can use $DEVICE,$READING,$VALUE and $NUM, e.g.:<br>
      <ul>
          <code>attr batteries valueStyle {($VALUE ne "ok")?'style="color:red"':'style="color:green"'}</code><br>
          <code>attr temperatures valueStyle {($DEVICE =~ m/aussen/)?'style="color:green"':'style="color:red"'}</code>
      </ul><br>

      Note: Only valueStyle, valueFomat, valueIcon and <{...}@reading> are evaluated during longpoll updates
      and valueStyle has to return a non empty style for every possible value. All other perl expressions are
      evaluated only once during html creation and will not reflect value updates with longpoll.
      Refresh the page to update the dynamic style. For nameStyle the color attribut is not working at the moment,
      the font-... and background attributes do work.<br><br>

      Calculation: to be written...<br>
      eg: <code>define rg readingsGroup .*:temperature rg:$avg</code><br>
      please see a description <a href="http://www.fhemwiki.de/wiki/ReadingsGroup#Berechnungen">in the wiki</a>
</ul>

=end html
=begin html_DE

<a name="readingsGroup"></a>
<h3>readingsGroup</h3>
<ul>
  Zeigt eine Sammlung von Messwerten von einem oder mehreren Ger&auml;ten an.

  <br><br>
  <a name="readingsGroup_Define"></a>
  <b>Define</b>
  <ul>
    <code>define &lt;name&gt; readingsGroup &lt;device&gt;[:regex] [&lt;device-2&gt;[:regex-2]] ... [&lt;device-n&gt;[:regex-n]]</code><br>
    <br>

    Anmerkungen:
    <ul>
	  <li>&lt;device&gt; kann die Form INTERNAL=VALUE haben, wobei INTERNAL der Name eines internen Wertes ist und VALUE ein Regex.</li>
      <li>&lt;device&gt; kann die Form ATTRIBUTE&VALUE haben, wobei ATTRIBUTE der Name eines Attributs ist und VALUE ein Regex.</li>
	  <li>&lt;device&gt; kann die Form &lt;STRING&gt; oder &lt;{perl}&gt; haben, wobei STRING oder die von Perl zur&uuml;ckgegebene Zeichenfolge als Zeile in die Readings List eingef&uuml;gt wird. Wird &uuml;bersprungen, wenn STRING undef ist.</li>
      <li>&lt;device&gt; kann ein devspec sein (siehe <a href="#devspec">devspec</a>) mit mindestens einem FILTER-Ausdruck sein.</li>
	  <li>Wenn Regex eine Komma separarierte Liste ist, werden die Reading-Values in einer einzelnen Zeile angezeigt.</li>
      <li>Wenn Regex mit einem "+" beginnt, wird es mit den internen Werten (Internals) des Ger&auml;ts anstelle der Readings verglichen.</li>
	  <li>Wenn Regex mit einem '?' beginnt, wird es mit den Attributen des Ger&auml;ts verglichen und nicht mit den Werten (Readings) verglichen.</li>
	  <li>Wenn Regex mit einem '!' beginnt, wird die Anzeige des Wertes erzwungen, auch wenn kein Reading mit diesem Namen verf&uuml;gbar ist.</li>
	  <li>Wenn Regex mit einem '$' beginnt, ist die Berechnung mit Wert-Spalten und Zeilen m&ouml;glich.</li>
	  <li>Die folgenden <a href="#set">"set magic"</a> Pr&auml;fixe und Suffixe k&ouml;nnen mit Regex verwendet werden:
         <ul>
           <li>Sie k&ouml;nnen anstelle von + und ? ein Pr&auml;fix i :, r: oder a: verwenden. Analog zur devspec-Filterung.</li>
           <li>Der Suffix :d ruft die erste Nummer ab.</li>
           <li>Der Suffix :i ruft den ganzzahligen Teil der ersten Zahl ab.</li>
           <li>Der Suffix :r&lt;n&gt; ruft die erste Zahl ab und rundet sie auf &lt;n&gt; Nachkommastellen ab. Wenn &lt;n&gt; fehlt, wird es auf eine Dezimalstelle gerundet.</li>
		   <li>Der Suffix :t gibt den Zeitstempel zur&uuml;ck (funktioniert nur mit Readings).</li>
           <li>Der Suffix :sec gibt die Anzahl der Sekunden seit dem das Reading gesetzt wurde zur&uuml;ck. Wahrscheinlich nicht n&uuml;tzlich mit readingsGroups.</li>
		 </ul></li>
      <li>Regex kann von der Form &lt;regex&gt;@device sein, um Readings von einem anderen Ger&auml;t zu verwenden.<br>
		  Wenn der Ger&auml;tename mit einem '!' beginnt, wird die Anzeige deaktiviert. Verwenden Sie in Verbindung mit ! den Reading-Name.</li>
      <li>Regex kann die Form &lt;regex&gt;@{perl} haben, um Readings von einem anderen Ger&auml;t zu verwenden.</li>
      <li>Regex kann von der Form &lt;STRING&gt; oder &lt;{perl}[@readings]&gt; sein, wobei STRING oder die von Perl zur&uuml;ckgegebene Zeichenfolge als Reading eingef&uuml;gt wird, oder:
          <ul><li>das Element wird &uuml;bersprungen, wenn STRING undef ist</li>
              <li>wenn STRING br ist, wird eine neue Zeile gestartet</li>
              <li>wenn STRING hr ist, wird eine horizontale Linie eingef&uuml;gt</li>
              <li>wenn STRING tfoot ist, wird der Tabellenfu&szlig; gestartet</li>
              <li>wenn STRING die Form hat, %ICON[%CMD] ICON wird als Name eines Symbols anstelle von Text und CMD als der Befehl verwendet, der ausgef&uuml;hrt werden soll, wenn auf das Symbol geklickt wird. Siehe auch die Befehlsattribute.</li></ul>
          Wenn Readings aktualisiert werden, wird der Perl-Ausdruck bei Longpoll-Aktualisierungen erneut ausgewertet.</li>
      <li>Wenn der erste Regex '@&lt;index&gt;' ist, gibt es den Index der folgenden Regex an, mit dem die Messwerte gruppiert werden sollen. Wenn Erfassungsgruppen verwendet werden, k&ouml;nnen sie durch #&lt;number&gt; refferenziert werden. z.Bsp:<br><ul>
          <code>&lt;IP-Adress&gt;&lt;Hostname&gt;&lt;MAC&gt;&lt;Vendor&gt;<br>
          nmap:@2,<#1>,(.*)_hostname,#1_macAddress,#1_macVendor</code></ul></li>
      <li>F&uuml;r interne Werte (Internals) und Attribute ist longpoll update nicht m&ouml;glich. Aktualisieren Sie die Seite, um die Werte zu aktualisieren.</li>
      <li>Der Ausdruck &lt;{perl}&gt; ist auf Ausdr&uuml;cke ohne Leerzeichen beschr&auml;nkt. Es ist am besten, eine kleine Sub in 99_myUtils.pm aufzurufen, anstatt einen complexen Ausdruck im Define zu haben.</li>
    </ul><br>

    Beispiele:
    <ul>
      <code>
        define batteries readingsGroup .*:battery</code><br>
      <br>
        <code>define temperatures readingsGroup s300th.*:temperature</code><br>
        <code>define temperatures readingsGroup TYPE=CUL_WS:temperature</code><br>
      <br>
        <code>define culRSSI readingsGroup cul_RSSI=.*:+cul_RSSI</code><br>
      <br>
        <code>define heizung readingsGroup t1:temperature t2:temperature t3:temperature<br>
        attr heizung notime 1<br>
        attr heizung mapping {'t1.temperature' => 'Vorlauf', 't2.temperature' => 'R&amp;uuml;cklauf', 't3.temperature' => 'Zirkulation'}<br>
        attr heizung style style="font-size:20px"<br>
      <br>
        define systemStatus readingsGroup sysstat<br>
        attr systemStatus notime 1<br>
        attr systemStatus nostate 1<br>
        attr systemStatus mapping {'load' => 'Systemauslastung', 'temperature' => 'Systemtemperatur in &amp;deg;C'}<br>
      <br>
        define Verbrauch readingsGroup TYPE=PCA301:state,power,consumption<br>
        attr Verbrauch mapping %ALIAS<br>
        attr Verbrauch nameStyle style="font-weight:bold"<br>
        attr Verbrauch style style="font-size:20px"<br>
        attr Verbrauch valueFormat {power => "%.1f W", consumption => "%.2f kWh"}<br>
        attr Verbrauch valueIcon { state => '%devStateIcon' }<br>
        attr Verbrauch valueStyle {($READING eq "power" && $VALUE > 150)?'style="color:red"':'style="color:green"'}<br>
      <br>
        define rg_battery readingsGroup TYPE=LaCrosse:[Bb]attery<br>
        attr rg_battery alias Batteriestatus<br>
        attr rg_battery commands { "battery.low" => "set %DEVICE replaceBatteryForSec 60" }<br>
        attr rg_battery valueIcon {'battery.ok' => 'batterie', 'battery.low' => 'batterie@red'}<br>
      <br>
        define rgMediaPlayer readingsGroup myMediaPlayer:currentTitle,<>,totaltime,<br>,currentAlbum,<>,currentArtist,<br>,volume,<{if(ReadingsVal($DEVICE,"playStatus","")eq"paused"){"%rc_PLAY%set+$DEVICE+play"}else{"%rc_PAUSE%set+$DEVICE+pause"}}@playStatus>,playStatus<br>
        attr rgMediaPlayer commands { "playStatus.paused" => "set %DEVICE play", "playStatus.playing" => "set %DEVICE pause" }<br>
        attr rgMediaPlayer mapping &nbsp;<br>
        attr rgMediaPlayer notime 1<br>
        attr rgMediaPlayer valueFormat { "volume" => "Volume: %i" }<br>
        #attr rgMediaPlayer valueIcon { "playStatus.paused" => "rc_PLAY", "playStatus.playing" => "rc_PAUSE" }<br>
      </code><br>
    </ul>
  </ul><br>

  <a name="readingsGroup_Set"></a>
    <b>Set</b>
    <ul>
      <li>hide<br>
      Alle sichtbaren Instanzen dieser ReadingsGroup werden ausgeblendet</li>
      <li>show<br>
      Zeigt alle sichtbaren Instanzen dieser ReadingsGroup an</li>
      <li>toggle<br>
      Schaltet den versteckten / angezeigten Zustand aller sichtbaren Instanzen dieser ReadingsGroup an.</li>
      <li>toggle2<br>
      schaltet den erweiterten / kollabierten Zustand aller sichtbaren Instanzen dieser ReadingsGroup an.</li>
    </ul><br>

  <a name="readingsGroup_Get"></a>
    <b>Get</b>
    <ul>
    </ul><br>

  <a name="readingsGroup_Attr"></a>
    <b>Attribute</b>
    <ul>
      <li>alwaysTrigger<br>
        1 -> Events auch wenn nicht sichtbar.<br>
        2 -> Events f&uuml;r berechnete Werte.</li><br>
      <li>disable<br>
        1 -> Deaktivieren der Benachrichtigung Verarbeitung und Longpoll-Updates. Hinweis: Dadurch wird auch die Umbenennung und L&ouml;schbehandlung deaktiviert.<br>
        2 -> Deaktivieren der HTML-Tabellenerstellung<br>
        3 -> Deaktivieren der HTML-Erstellung vollst&auml;ndig</li><br>
      <li>sortDevices<br>
        1 -> Sortieren der Ger&auml;teliste alphabetisch. Verwenden Sie das erste von sortby oder alias oder name, das f&uuml;r jedes Ger&auml;t definiert ist.</li>
      <li>noheading<br>
        Wenn sie auf 1 gesetzt ist, hat die Readings-Tabelle keine &Uuml;berschrift.</li><br>
      <li>nolinks<br>
        Deaktiviert die HTML-Links von der &Uuml;berschrift und den Readings-Namen.</li><br>
      <li>nostate<br>
        Wenn der Wert 1 ist, wird der Status nicht ber&uuml;cksichtigt.</li><br>
      <li>nonames<br>
        Wenn der Wert auf 1 gesetzt ist, wird der Readings-Name / Zeilentitel nicht angezeigt.</li><br>
      <li>notime<br>
        Wenn der Wert auf 1 gesetzt, wird der Readings-Timestamp nicht angezeigt.</li><br>
      <li>mapping<br>
        Kann ein einfacher String oder ein in {} eingeschlossener Perl-Ausdruck sein, der einen Hash zur&uuml;ckgibt, der den Reading-Name dem angezeigten Namen zuordnet.
		Der Schl&uuml;ssel kann entweder der Name des Readings oder &lt;device&gt;.&lt;reading&gt; oder &lt;reading&gt;.&lt;value&gt; oder &lt;device&gt;.&lt;reading&gt;.&lt;value&gt; sein.
        %DEVICE, %ALIAS, %ROOM, %GROUP, %ROW und %READING werden durch den Ger&auml;tenamen, Ger&auml;tealias, Raumattribut ersetzt. Sie k&ouml;nnen diesen Keywords auch ein Pr&auml;fix voranstellen $ anstatt von %. Beispiele:<br>
          <code>attr temperatures mapping $DEVICE-$READING</code><br>
          <code>attr temperatures mapping {temperature => "%DEVICE Temperatur"}</code>
        </li><br>
      <li>separator<br>
        Das zu verwendende Trennzeichen zwischen dem Ger&auml;tealias und dem Reading-Namen, wenn keine Zuordnung angegeben ist, standardgem&auml;&szlig; ':'
        Ein Leerzeichen wird so dargestellt <code>&amp;nbsp;</code></li><br>
      <li>setList<br>
        Eine durch Leerzeichen getrennte Liste von Befehlen, die zur&uuml;ckgegeben werden "set name ?",
        Das FHEMWEB-Frontend kann also ein Dropdown-Men&uuml; erstellen und An / Aus-Schalter anbieten.
        Set-Befehle, die nicht in dieser Liste enthalten sind, werden zur&uuml;ckgewiesen.</li><br>
      <li>setFn<br>
        Perl-Ausdruck, der f&uuml;r die Befehle aus der setList ausgef&uuml;hrt wird. Es hat Zugriff auf $CMD und $ARGS.</li><br>
      <li>style<br>
        Geben Sie einen HTML-Stil f&uuml;r die Readings-Tabelle an, z.Bsp:<br>
          <code>attr temperatures style style="font-size:20px"</code></li><br>
      <li>cellStyle<br>
        Geben Sie einen HTML-Stil f&uuml;r eine Zelle der Readings-Tabelle an. Normale Zeilen und Spalten werden gez&auml;hlt beginnend mit 1,
        Die Zeilen&uuml;berschriften beginnt mit der Spaltennummer 0. Perl-Code hat Zugriff auf $ROW und $COLUMN. Schl&uuml;ssel f&uuml;r Hash-Lookup k&ouml;nnen sein:
        r:#, c:# oder r:#,c:# , z.Bsp:<br>
          <code>attr temperatures cellStyle { "c:0" => 'style="text-align:right"' }</code></li><br>
      <li>nameStyle<br>
        Geben Sie einen HTML-Stil f&uuml;r die Readings-Namen an, z.Bsp:<br>
          <code>attr temperatures nameStyle style="font-weight:bold"</code></li><br>
      <li>valueStyle<br>
        Geben Sie einen HTML-Stil f&uuml;r die Readings-Werte an, z.Bsp:<br>
          <code>attr temperatures valueStyle style="text-align:right"</code></li><br>
      <li>valueColumn<br>
        Geben Sie die Mindestspalte an, in der ein Messwert angezeigt werden soll. z.Bsp:<br>
          <code>attr temperatures valueColumn { temperature => 2 }</code></li><br>
      <li>valueColumns<br>
        Geben Sie einen HTML-Colspan f&uuml;r die Readings-Werte an, z.Bsp:<br>
          <code>attr wzReceiverRG valueColumns { eventdescription => 'colspan="4"' }</code></li><br>
      <li>valueFormat<br>
        Geben Sie eine Sprintf-Stilformat-Zeichenfolge an, die zum Anzeigen der Readings-Werte verwendet wird. Wenn die Formatzeichenfolge undef ist
        wird dieser Messwert &uuml;bersprungen. Es kann als String angegeben werden, ein Perl-Ausdruck, der einen Hash- oder Perl-Ausdruck zur&uuml;ckgibt, der einen String zur&uuml;ckgibt, z.Bsp:<br>
          <code>attr temperatures valueFormat %.1f &deg;C</code><br>
          <code>attr temperatures valueFormat { temperature => "%.1f &deg;C", humidity => "%i %%" }</code><br>
          <code>attr temperatures valueFormat { ($READING eq 'temperature')?"%.1f &deg;C":undef }</code></li><br>
      <li>valuePrefix<br>
        Text, der dem Readings-Wert vorangestellt wird</li><br>
      <li>valueSuffix<br>
        Text, der nach dem Readings-Wert angeh&auml;ngt wird<br>
          <code>attr temperatures valueFormat { temperature => "%.1f", humidity => "%i" }</code><br>
          <code>attr temperatures valueSuffix { temperature => "&deg;C", humidity => " %" }</code></li><br>
      <li>nameIcon<br>
        Geben Sie das Symbol an, das anstelle des Readings-Name verwendet werden soll. Es kann ein einfacher String oder ein in {} eingeschlossener Perl-Ausdruck sein, der einen Hash zur&uuml;ckgibt, der dem Readings-Name den Icon-Namen zuordnet. z.Bsp:<br>
          <code>attr devices nameIcon $DEVICE</code></li><br>
      <li>valueIcon<br>
        Geben Sie ein Symbol an, das anstelle des Readings-Wert verwendet werden soll. Es kann ein einfacher String oder ein in {} eingeschlossener Perl-Ausdruck sein, der einen Hash zur&uuml;ckgibt, der dem Readings-Wert dem Symbolnamen zuordnet. z.Bsp:<br>
          <code>attr devices valueIcon $VALUE</code><br>
          <code>attr devices valueIcon {state => '%VALUE'}</code><br>
          <code>attr devices valueIcon {state => '%devStateIcon'}</code><br>
          <code>attr rgMediaPlayer valueIcon { "playStatus.paused" => "rc_PLAY", "playStatus.playing" => "rc_PAUSE" }</code></li><br>
      <li>commands<br>
        Kann auf verschiedene Arten verwendet werden:
        <ul>
        <li>Um ein Reading oder ein Symbol anklickbar zu machen, indem Sie direkt den Befehl angeben, der ausgef&uuml;hrt werden soll. z.Bsp:<br>
        <code>attr rgMediaPlayer commands { "playStatus.paused" => "set %DEVICE play", "playStatus.playing" => "set %DEVICE pause" }</code></li>
        <li>Wenn der zugeordnete Befehl die Form &lt;command&gt;:[&lt;modifier&gt;] hat, wird das normale <a href="#FHEMWEB">FHEMWEB</a> webCmd-Widget f&uuml;r <Modifikator> f&uuml;r diesen commands verwendet. z.Bsp:<br>
        <code>attr rgMediaPlayer commands { volume => "volume:slider,0,1,100" }</code><br>
        <code>attr lights commands { pct => "pct:", dim => "dim:" }</code></li>
        <li>commands k&ouml;nnen f&uuml;r Attribute verwendet werden. z.Bsp:<br>
        <code>attr <rg> commands { disable => "disable:" }</code></li>
        </ul></li><br>
      <li>visibility<br>
        Wenn sie auf hidden oder hideable eingestellt ist, wird eine kleine Schaltfl&auml;che links neben dem Namen der Readings-Group angezeigt, um den Inhalt der Readings-Group zu erweitern / auszublenden. Wenn eine Readings-Group erweitert wird, werden alle anderen Gruppen derselben Gruppe ausgeblendet.<br>
        <ul>
        hidden -> Standardm&auml;&szlig;ig ist hidden aktiv, kann jedoch erweitert werden.<br>
        hideable -> Standardm&auml;&szlig;ig ist hideable aktiv, kann jedoch ausgeblendet werden.<br><br>
        </ul>
        Wenn diese Option auf "collapsed" oder "collapsible" eingestellt ist, erkennt readingsGroup die Specials &lt;-&gt;,&lt;+&gt; und &lt;+-&gt; als die ersten Elemente von
        eine Linie, um dieser Linie ein + oder - Symbol hinzuzuf&uuml;gen. Durch Klicken auf das + oder - Symbol wird zwischen erweitertem und reduziertem Zustand umgeschaltet. Wenn eine Readings-Group erweitert wird, werden alle anderen Gruppen in der gleichen Gruppe ausgeblendet.
        <ul>
        - -> Die Linie wird im expandierten Zustand sichtbar sein.<br>
        + -> Die Linie wird im zusammengefalteten Zustand angezeigt.<br>
        +- -> Die Linie wird in beiden Zust&auml;nden sichtbar sein.<br>
        <br>
        collapsed -> Der Standardstatus ist reduziert, kann jedoch erweitert werden.<br>
        collapsible -> Der Standardstatus ist sichtbar, kann jedoch minimiert werden.<br><br></li>
        </ul>
        <li>headerRows<br><br>
        </li>
        <li>sortColumn<br>
          &gt; 0 -> sortiert die Tabelle automatisch nach dem Laden der Seite nach dieser Spalte<br>
          0 -> sortiert Sie nicht automatisch, sondern durch Klicken auf eine Spalten&uuml;berschrift<br>
          &lt; 0 -> sortiert die Tabelle automatisch nach dem Laden der Seite nach dieser Spalte
        </li>
        <br><li><a href="#perlSyntaxCheck">perlSyntaxCheck</a></li>
    </ul><br>

      F&uuml;r die Hash-Version aller Zuordnungsattribute kann ein Standardwert angegeben werden mit <code>{ '' => &lt;default&gt; }</code>.<br><br>

      Die Stilattribute k&ouml;nnen auch einen in {} eingeschlossenen Perl-Ausdruck enthalten, der die zu verwendende Stilzeichenfolge zur&uuml;ckgibt. F&uuml;r nameStyle und valueStyle, kann der Perl-Code $DEVICE,$READING,$VALUE und $NUM verwendet werden. z.Bsp:<br>
      <ul>
          <code>attr batteries valueStyle {($VALUE ne "ok")?'style="color:red"':'style="color:green"'}</code><br>
          <code>attr temperatures valueStyle {($DEVICE =~ m/aussen/)?'style="color:green"':'style="color:red"'}</code>
      </ul><br>

      Hinweis: Nur valueStyle, valueFomat, valueIcon und <{...}@reading> werden bei Longpoll-Updates ausgewertet und valueStyle muss f&uuml;r jeden m&ouml;glichen Wert einen nicht leeren Stil zur&uuml;ckgeben. Alle anderen Perl-Ausdr&uuml;cke werden nur einmal w&auml;hrend der HTML-Erstellung ausgewertet und geben keine Wertupdates mit longpoll wieder.
      Aktualisieren Sie die Seite, um den dynamischen Stil zu aktualisieren. F&uuml;r nameStyle funktioniert das Farbattribut momentan nicht, die font -... und background Attribute funktionieren.<br><br>

      Berechnung: Bitte sehen Sie sich daf&uuml;r diese <a href="http://www.fhemwiki.de/wiki/ReadingsGroup#Berechnungen">Beschreibung</a> an in der Wiki.<br>
      z.Bsp: <code>define rg readingsGroup .*:temperature rg:$avg</code>

</ul>

=end html_DE
=cut