diff --git a/fhem/FHEM/93_PWMR.pm b/fhem/FHEM/93_PWMR.pm
new file mode 100644
index 000000000..4a829154f
--- /dev/null
+++ b/fhem/FHEM/93_PWMR.pm
@@ -0,0 +1,1580 @@
+#
+#
+# 93_PWMR.pm
+# written by Andreas Goebel 2012-07-25
+# e-mail: ag at goebel-it dot de
+#
+##############################################
+# $Id$ 
+# 29.07.15 GA change set <name> manualTempDuration <minutes>
+# 21.09.15 GA update, use Log3 and readingsSingleUpdate
+# 07.10.15 GA initial version published
+# 07.10.15 GA fix calculation of PWMPulse, default for c_autoCalcTemp
+# 13.10.15 GA add event-on-change-reading
+# 14.10.15 GA fix round energyusedp 
+# 15.10.15 GA add a_regexp_on, a regular expression for the on state of the actor
+# 05.11.15 GA fix new reading desired-temp-until which substitutes modification date of desired-temp in the future
+#                 events for desired-temp adjusted (no update of timestamp if temperature stays the same)
+# 10.11.15 GA fix event for actor change added again, desired-temp notifications adjusted for midnight change
+# 17.11.15 GA add ReadRoom will now set a reading named temperature containing the last temperature used for calculation
+# 18.11.15 GA add adjusted energyusedp to be in percent. Now it can be used in Tablet-UI as valve-position
+# 19.11.15 GA fix move actorState to readings
+# 22.11.15 GA fix rules on wednesday are now possible (thanks to Skusi)
+# 22.11.15 GA fix error handling in SetRoom (thanks to cobra112)
+# 30.11.15 GA fix set reading of desired-temp-used to frost_protect if window is opened
+# 30.11.15 GA add call PWMR_Attr in PWMR_Define if already some attributes are defined
+# 26.01.16 GA fix don't call AssignIoPort
+# 26.01.16 GA fix assign IODev as reference to that hash (otherwise xmllist will crash fhem)
+# 26.01.16 GA add implementation of PID regulation
+# 27.01.16 GA add attribute desiredTempFrom to take desiredTemp from another object
+# 04.02.16 GA add DLookBackCnt, buffer holding previouse temperatures used for PID D-Part calculation
+# 08.02.16 GA add ILookBackCnt, buffer holding previouse temperatures used for PID I-Part calculation
+# 08.02.16 GA add valueFormat attribute
+# 29.06.16 GA add "set frostProtect on|off"
+# 16.08.16 GA add event-min-interval
+# 23.09.16 GA fix changes on commandref based on suggestions from user "sledge"
+
+
+# module for PWM (Pulse Width Modulation) calculation
+# this module defines a room for calculation 
+# it is used by a PWM object 
+# reference to the PWM object is via IODev
+# PWMR object defines:
+#  IODev: reference to PWM
+#  factor (also used in Pulse calculation): 
+#     temperatur difference * factor * cycletime (from PWM) defines on/off periods (pulse)
+#  sensor delivering the temperature (temperature is read from reading using a regexp)
+#  actor to switch on/off the heating devices (may be a structure if more than on actor..)
+#  comma separated list of window contacts followd by ":" and a regular expression 
+#     default for the regular expression is "Open"
+#     if the regular expression matches on of the contacts 
+#     then readRoom will return c_tempFrostProtect as desired-temp
+#     instead of the current calculated desired-temp
+#     this should cause the calculation routine for the room to switch off heating
+#
+# calculation of "desired-temp" is done in a loop (5-minutes default)
+#  - if c_frostProtect is "1" -> set to c_tempFrostProtect
+#  - if c_autoCalcTemp is "1" -> use c_tempN, c_tempD, c_tempC, c_tempE and c_tempRule[1-5]
+#  - c_* variables are syntax checked and derived from attr which have a readable syntax
+# 
+#  - c_tempRule[1-5] are processed in order 5..1 (5 is highes priority)
+#    rules define: 
+#    <interval of valid days (0..6 = So..Sa)
+#    <time>,[N|D|C] [<time>,[N|D|C|E]] 
+#      ... time is interpreted as Hour[:Min]       
+#      ... N,D,C,E reference timeN (Night), timeD (Day), timeC (Cosy), timeE(Energysave)
+# 
+#    attr names are: tempDay, tempCosy, tempNight, tempEnergy ...
+#
+# subroutines PWMR_ReedRoom and PWMR_SetRoom are called from PWM object
+
+
+package main;
+
+use strict;
+use warnings;
+
+my %dayno = (
+   "mo"  => 1,
+   "di"  => 2,
+   "mi"  => 3,
+   "do"  => 4,
+   "fr"  => 5,
+   "sa"  => 6,
+   "so"  => 0
+);
+
+sub PWMR_Get($@);
+sub PWMR_Set($@);
+sub PWMR_Define($$);
+sub PWMR_CalcDesiredTemp($);
+sub PWMR_SetRoom(@);
+sub PWMR_ReadRoom(@);
+sub PWMR_Attr(@);
+sub PWMR_Boost(@);
+sub PWMR_valueFormat(@);
+
+###################################
+sub
+PWMR_Initialize($)
+{
+  my ($hash) = @_;
+
+  $hash->{GetFn}     = "PWMR_Get";
+  $hash->{SetFn}     = "PWMR_Set";
+  $hash->{DefFn}     = "PWMR_Define";
+  $hash->{UndefFn}   = "PWMR_Undef";
+  $hash->{AttrFn}    = "PWMR_Attr";
+
+  $hash->{AttrList}  = "disable:1,0 loglevel:0,1,2,3,4,5 event-on-change-reading event-min-interval ".
+			"frostProtect:0,1 ".
+			"autoCalcTemp:0,1 ".
+			"desiredTempFrom ".
+                        "tempFrostProtect ".
+			"tempDay ".
+			"tempNight ".
+			"tempCosy ".
+			"tempEnergy ".
+			"tempRule1 ".
+			"tempRule2 ".
+			"tempRule3 ".
+			"tempRule4 ".
+			"tempRule5 ".
+			"valueFormat:textField-long ".
+ 			"";
+
+}
+
+sub
+PWMR_getDesiredTempFrom(@)
+{
+      my ($hash, $dt, $d_reading, $d_regexpTemp) = @_; 
+      my $newTemp;
+
+      my $d_readingVal  = defined($dt->{READINGS}{$d_reading}{VAL}) ? $dt->{READINGS}{$d_reading}{VAL} : "undef"; 
+
+      my $val           = $d_readingVal;
+      $val              =~ /$d_regexpTemp/;
+ 
+      if (defined($1)) { 
+        $newTemp  = $1;
+        Log3 ($hash, 4, "PWMR_getDesiredTempFrom $hash->{NAME}: from $dt->{NAME} reading($d_reading) VAL($d_readingVal) regexp($d_regexpTemp) regexpVal($val)");
+
+      } else {
+        $newTemp = $hash->{c_tempFrostProtect};
+        Log3 ($hash, 4, "PWMR_getDesiredTempFrom $hash->{NAME}: from $dt->{NAME} reading($d_reading) VAL($d_readingVal) regexp($d_regexpTemp) regexpVal($val) set to frostProtect");
+
+      }
+
+      Log3 ($hash, 4, "PWMR_getDesiredTempFrom $hash->{NAME}: from $dt->{NAME} reading($d_reading) VAL($d_readingVal) regexp($d_regexpTemp) regexpVal($val)");
+
+      return ($newTemp);
+
+}
+###################################
+sub
+PWMR_CalcDesiredTemp($)
+{
+  my ($hash) = @_;
+
+  if($hash->{INTERVAL} > 0) {
+    if ($hash->{INTERVAL} == 300) {
+      # align interval to hh:00:ss, hh:05:ss, ... hh:55:ss
+      
+      my $n = gettimeofday();
+      my ($hour, $min, $sec) = split (":", FmtTime($n));
+
+      # 15:12:05 -> 15:16:05  
+      my $offset = ((((int($min/ 5)) +1 ) * 5 ) - $min) * 60;
+      #Log3 ($hash, 4, "offset $min -> ".int($min / 5)." $offset ".($offset / 60));
+
+      InternalTimer($n + $offset, "PWMR_CalcDesiredTemp", $hash, 0);
+
+    } else {
+      InternalTimer(gettimeofday()+$hash->{INTERVAL}, "PWMR_CalcDesiredTemp", $hash, 0);
+      #Log3 ($hash, 4, "interval not 300");
+    }
+  }
+
+  my $name = $hash->{NAME};
+
+  if (defined($hash->{READINGS}{"desired-temp-until"})) {
+    if ($hash->{READINGS}{"desired-temp-until"}{VAL} ne "no" ) {
+
+      if ($hash->{READINGS}{"desired-temp-until"}{VAL} gt TimeNow()) {
+
+        Log3 ($hash, 4, "PWMR_CalcDesiredTemp $name: desired-temp was manualy set until ".
+          $hash->{READINGS}{"desired-temp"}{TIME});
+        $hash->{STATE}     = "ManualSetUntil";
+        return undef;
+      }
+      else
+      {
+        readingsSingleUpdate ($hash,  "desired-temp-until", "no", 1);
+        Log3 ($hash, 4, "PWMR_CalcDesiredTemp $name: calc desired-temp");
+      }
+    }
+  }
+
+  #if ($hash->{READINGS}{"desired-temp"}{TIME} gt TimeNow()) {
+  #  Log3 ($hash, 4, "PWMR_CalcDesiredTemp $name: desired-temp was manualy set until ".
+  #      $hash->{READINGS}{"desired-temp"}{TIME});
+  #
+  #  $hash->{STATE}     = "ManualSetUntil";
+  #  return undef;
+  #} else {
+  #  Log3 ($hash, 4, "PWMR_CalcDesiredTemp $name: calc desired-temp");
+  #}
+
+  ####################
+  # frost protection
+
+  if ($hash->{c_frostProtect} > 0) {
+    if ($hash->{READINGS}{"desired-temp"}{VAL} ne $hash->{c_tempFrostProtect}  
+        or substr(TimeNow(),1,8) ne substr($hash->{READINGS}{"desired-temp"}{TIME},1,8)) {
+      readingsSingleUpdate ($hash,  "desired-temp", $hash->{c_tempFrostProtect}, 1);
+    } else {
+      readingsSingleUpdate ($hash,  "desired-temp", $hash->{c_tempFrostProtect}, 0);
+    }
+
+    #$hash->{READINGS}{"desired-tem"}{TIME} = TimeNow();
+    #$hash->{READINGS}{"desired-temp"}{VAL} = $hash->{c_tempFrostProtect};
+
+    #push @{$hash->{CHANGED}}, "desired-temp $hash->{c_tempFrostProtect}";
+    #DoTrigger($name, undef);
+ 
+    $hash->{STATE}     = "FrostProtect";
+    return undef;
+  }
+
+  ####################
+  # rule based calculation
+
+  if ($hash->{c_autoCalcTemp} > 0 ) {
+    if ($hash->{c_desiredTempFrom} eq "") {
+
+      $hash->{STATE}     = "Calculating";
+  
+      my @time = localtime();
+      my $wday = $time[6];
+      my $cmptime = sprintf ("%02d%02d", $time[2], $time[1]);
+      Log3 ($hash, 4, "PWMR_CalcDesiredTemp $name: wday $wday cmptime $cmptime");
+  
+      foreach my $rule ($hash->{c_tempRule5}, 
+                        $hash->{c_tempRule4}, 
+                        $hash->{c_tempRule3}, 
+                        $hash->{c_tempRule2}, 
+                        $hash->{c_tempRule1} ) {
+        if ($rule ne "") {		# valid rule is 1-5 0600,D 1800,C 2200,N
+  
+          Log3 ($hash, 5, "PWMR_CalcDesiredTemp $name: $rule");
+  
+          my @points = split (" ", $rule);
+  
+          my ($dayfrom, $dayto) = split ("-", $points[0]);
+          #Log3 ($hash, 5, "PWMR_CalcDesiredTemp $name: dayfrom $dayfrom dayto $dayto");
+  
+          my $rulematch = 0;
+          if ($dayfrom <= $dayto ) {                    # rule 1-5 or 4-4
+            $rulematch = ($wday >= $dayfrom && $wday <= $dayto);
+          } else {                                      # rule  5-2
+            $rulematch = ($wday >= $dayfrom || $wday <= $dayto);
+          }
+  
+          if ($rulematch) {
+  
+            for (my $i=int(@points)-1; $i>0; $i--) {
+              Log3 ($hash, 5, "PWMR_CalcDesiredTemp $name: i:$i $points[$i]");
+  
+              my ($ruletime, $tempV) = split (",", $points[$i]);
+  
+              if ($cmptime >= $ruletime) {
+  
+                my $temperature = $hash->{"c_tempN"};
+                $temperature = $hash->{"c_tempD"} if ($tempV eq "D");
+                $temperature = $hash->{"c_tempC"} if ($tempV eq "C");
+                $temperature = $hash->{"c_tempE"} if ($tempV eq "E");
+  
+                Log3 ($hash, 4, "PWMR_CalcDesiredTemp $name: match i:$i $points[$i] ($tempV/$temperature)");
+                 
+                if ($hash->{READINGS}{"desired-temp"}{VAL} ne $temperature 
+                    or substr(TimeNow(),1,8) ne substr($hash->{READINGS}{"desired-temp"}{TIME},1,8)) {
+                  readingsSingleUpdate ($hash,  "desired-temp", $temperature, 1);
+                } else {
+                  readingsSingleUpdate ($hash,  "desired-temp", $temperature, 0);
+                }
+  
+                #$hash->{READINGS}{"desired-temp"}{TIME} = TimeNow();
+                #$hash->{READINGS}{"desired-temp"}{VAL} = $temperature;
+  
+                #push @{$hash->{CHANGED}}, "desired-temp $temperature";
+                #DoTrigger($name, undef);
+                return undef;
+              } 
+  
+            }
+            # no interval matched .. guess I am before the first one
+            # so I choose the temperature from yesterday :-)
+            # this should be the tempN
+            my $newTemp = $hash->{"c_tempN"};
+  
+            my $act_dtemp = $hash->{READINGS}{"desired-temp"}{VAL};
+            Log3 ($hash, 4, "PWMR_CalcDesiredTemp $name: use last value ($act_dtemp)");
+  
+            if ($act_dtemp ne $newTemp
+              or substr(TimeNow(),1,8) ne substr($hash->{READINGS}{"desired-temp"}{TIME},1,8)) {
+              readingsSingleUpdate ($hash,  "desired-temp", $newTemp, 1);
+            #} else {
+            #  readingsSingleUpdate ($hash,  "desired-temp", $newTemp, 0);
+            }
+  
+            #$hash->{READINGS}{"desired-temp"}{TIME} = TimeNow();
+            #$hash->{READINGS}{"desired-temp"}{VAL} = $newTemp;
+  
+            #push @{$hash->{CHANGED}}, "desired-temp $newTemp";
+            #DoTrigger($name, undef);
+            return undef;
+          }
+        }
+      }
+    } else { # $hash->{c_desiredTempFrom} is set
+      $hash->{STATE}     = "From $hash->{d_name}";
+
+      my $newTemp = PWMR_getDesiredTempFrom ($hash, $defs{$hash->{d_name}}, $hash->{d_reading}, $hash->{d_regexpTemp});
+
+      if ($hash->{READINGS}{"desired-temp"}{VAL} ne $newTemp 
+         or substr(TimeNow(),1,8) ne substr($hash->{READINGS}{"desired-temp"}{TIME},1,8)) {
+           readingsSingleUpdate ($hash,  "desired-temp", $newTemp, 1);
+      } else {
+         readingsSingleUpdate ($hash,  "desired-temp", $newTemp, 0);
+      }
+  
+    }
+  } else {
+    $hash->{STATE}     = "Manual";
+  }
+
+  #DoTrigger($name, undef);
+  return undef;
+
+}
+
+###################################
+sub
+PWMR_Get($@)
+{
+  my ($hash, @a) = @_;
+
+  return "argument is missing" if(int(@a) != 2);
+
+  my $msg;
+
+  if($a[1] ne "status") {
+    return "unknown get value, valid is status";
+  }
+  $hash->{LOCAL} = 1;
+  RemoveInternalTimer($hash);
+  my $v = PWMR_CalcDesiredTemp($hash);
+  delete $hash->{LOCAL};
+
+  return "$a[0] $a[1] => recalculatd";
+}
+
+#############################
+sub
+PWMR_Set($@)
+{
+  my ($hash, @a) = @_;
+  my $name = $hash->{NAME};
+
+  my @list = map { ($_.".0", $_+0.5) } (6..29);
+  my $valList = join (",", @list);
+  $valList .= ",30.0";
+  #my $u = "Unknown argument $a[1], choose one of factor actor:off,on desired-temp:knob,min:6,max:26,step:0.5,linecap:round interval manualTempDuration:slider,60,60,600";
+  #my $u = "Unknown argument $a[1], choose one of factor actor:off,on desired-temp:uzsuDropDown:$valList interval manualTempDuration:slider,60,60,600";
+  my $u = "Unknown argument $a[1], choose one of factor actor:off,on desired-temp:$valList interval manualTempDuration:slider,60,60,600 frostProtect:off,on";
+
+  $valList = "slider,6,0.5,30,0.5";
+
+  return $u if ($a[1] eq "?");
+
+  return $u if(int(@a) < 3);
+
+  my $cmd = $a[1];
+
+  ##############
+  # manualTempDuration
+
+  if ( $cmd eq "manualTempDuration" ) {
+    readingsSingleUpdate ($hash,  "manualTempDuration", $a[2], 1);
+
+    #$hash->{READINGS}{"manualTempDuration"}{VAL} = $a[2];
+    #$hash->{READINGS}{"manualTempDuration"}{TIME} = TimeNow();
+    return undef;
+  } 
+
+  ##############
+  # desired-temp
+
+  if ( $cmd eq "desired-temp" ) {
+    my $val = $a[2];
+    if ( $val < 6 || $val > 30 ) {
+      return "Unknown argument for $cmd, choose <6..30>";
+    }
+    
+    my $duration = defined($hash->{READINGS}{"manualTempDuration"}{VAL}) ? $hash->{READINGS}{"manualTempDuration"}{VAL} * 60 : 60 * 60;
+
+    if (defined($a[3])) {
+      $duration = int($a[3]) * 60;
+    }
+    
+    # manual set desired-temp will be set for 1 hour (default)
+    # afterwards it will be overwritten by auto calc
+ 
+    my $now =  time();
+
+    readingsBeginUpdate ($hash);
+    readingsBulkUpdate ($hash,  "desired-temp", $a[2]);
+    if ($hash->{c_autoCalcTemp} == 0) {
+      $hash->{STATE}     = "Manual";
+    } else {
+      $hash->{STATE}     = "ManualSetUntil";
+      readingsBulkUpdate ($hash,  "desired-temp-until", FmtDateTime($now + $duration));
+    }
+    readingsEndUpdate($hash, 1);
+ 
+    #readingsSingleUpdate ($hash,  "desired-temp", $a[2], 1);
+
+    #$hash->{READINGS}{$cmd}{TIME} = FmtDateTime($now + $duration);
+    #$hash->{READINGS}{$cmd}{VAL} = $val;
+
+
+    #push @{$hash->{CHANGED}}, "$cmd: $val";
+    #DoTrigger($hash, undef);
+    return undef
+  } 
+
+  ##############
+  # actor 
+
+  if ( $cmd eq "actor" ) {
+    my $val = $a[2];
+    if ( $val eq "on" || $val eq "off" ) {
+      PWMR_SetRoom($hash, $val);
+      return undef;
+    } else {
+      return "Unknow argument for $cmd, choose on|off";
+    }
+  }
+
+  ##############
+  # frostProtect 
+
+  if ( $cmd eq "frostProtect" ) {
+    my $val = $a[2];
+    if ( $val eq "on" ) {
+      $hash->{c_frostProtect} = 1;
+      $attr{$name}{frostProtect} = 1;
+      return undef;
+    } elsif ( $val eq "off" ) {
+      $hash->{c_frostProtect} = 0;
+      $attr{$name}{frostProtect} = 0;
+      return undef;
+    } else {
+      return "Unknow argument for $cmd, choose on|off";
+    }
+  }
+
+  ##############
+  # others
+
+  if ($cmd =~ /^interval$|^factor$/) {
+	my $var = uc($a[1]);
+	$hash->{$var} = $a[2];
+  } else {
+      return $u;
+  }
+
+  return undef;
+}
+
+
+#############################
+sub
+PWMR_Define($$)
+{
+  my ($hash, $def) = @_;
+  my @a = split("[ \t][ \t]*", $def);
+
+  my $name = $hash->{NAME};
+
+  return "syntax: define <name> PWMR <IODev> <factor[,offset]> <tsensor[:reading[:t_regexp]]> <actor>[:<a_regexp_on>] [<window|dummy>[,<window>][:<w_regexp>]] [<usePID 0|1>:<PFactor>:<IFactor>[,<ILookBackCnt>]:<DFactor>[,<DLookBackCnt>]]"
+    if(int(@a) < 6 || int(@a) > 9);
+
+  my $iodevname = $a[2];
+  my $factor  = ((int(@a) > 2) ? $a[3] : 0.2);
+  my $tsensor = ((int(@a) > 3) ? $a[4] : "");
+  my $actor   = ((int(@a) > 4) ? $a[5] : "");
+  my $window  = ((int(@a) > 6) ? $a[6] : "");
+  my $pid     = ((int(@a) > 7) ? $a[7] : "");
+
+  my ($f, $o) = split (",", $factor, 2);
+  $o = 0.11 unless (defined ($o));       # if cycletime is 900 then this increases the on-time by 1:39 (=99 seconds)
+ 
+  $hash->{TEMPSENSOR}         = $tsensor;
+  $hash->{ACTOR}              = $actor;
+  $hash->{WINDOW}             = ($window eq "dummy" ? "" : $window);
+  $hash->{FACTOR}             = $f;		# pulse is calculated using the below formular
+  $hash->{FOFFSET}            = $o;             # ( $deltaTemp * $factor) ** 2) + $factoroffset
+  $hash->{c_desiredTempFrom}  = "";
+  
+  #$hash->{helper}{cycletime}  = 0;
+
+  if ( !$iodevname ) {
+    return "unknown device $iodevname";
+  }
+
+  if ( $defs{$iodevname}->{TYPE} ne "PWM" ) {
+    return "wrong type of $iodevname (not PWM)";
+  }
+
+  #$hash->{IODev} = $iodev;
+  $hash->{IODev} = $defs{$iodevname};
+  
+  ##########
+  # calculage factoroffset 
+  # 01.10.2015
+  #my $minonoff     = $defs{$iodev}->{MINONOFFTIME};
+  #my $cycle        = $defs{$iodev}->{CYCLETIME};
+  #my $factorOffset = ($minonoff / $cycle) - 0.02;
+  #$factorOffset = sprintf ("%.2f", $factorOffset);
+  #$hash->{factoroffset} = $factorOffset;
+
+  ##########
+  # check window
+
+  $hash->{windows} = "";
+
+  my ($allwindows, $w_regexp) = split (":", $window, 2);
+
+  if ( !defined($w_regexp) ) 
+  {  
+    # this regexp defines the result of ReadRoom
+    # if any window is open return 1
+
+    $w_regexp = '.*Open.*'
+  }
+  $hash->{w_regexp}    = $w_regexp;
+
+  if ( defined ($allwindows) ) { 
+    my (@windows) = split (",", $allwindows);
+    foreach my $onewindow (@windows) {
+  
+      if (!$defs{$onewindow} && $onewindow ne "dummy") {
+        my $msg = "$name: Unknown window device $onewindow specified";
+        Log3 ($hash, 3, "PWMR_Define $msg");
+        return $msg;
+      }
+
+      if (length($hash->{windows}) > 0 ) {
+        $hash->{windows} .= ",$onewindow"
+      } else {
+        $hash->{windows} = "$onewindow"
+      }
+    }
+  }
+
+  ##########
+  # check pid definition
+
+  my ($usePID, $PFactor, $IFactorTemp, $DFactorTemp) = split (":", $pid, 5);
+
+  $IFactorTemp = "0,1" unless (defined ($IFactorTemp));
+  $DFactorTemp = "0,1"unless (defined ($DFactorTemp));
+
+  my ($IFactor, $ILookBackCnt) = split (",", $IFactorTemp, 2);
+  my ($DFactor, $DLookBackCnt) = split (",", $DFactorTemp, 2);
+
+  $hash->{c_PID_useit}        = !defined($usePID)  ?      -1 : $usePID;
+  $hash->{c_PID_PFactor}      = !defined($PFactor) ?       0 : $PFactor;
+  $hash->{c_PID_IFactor}      = !defined($IFactor) ?       0 : $IFactor;
+  $hash->{c_PID_DFactor}      = !defined($DFactor) ?       0 : $DFactor;
+
+  $hash->{c_PID_ILookBackCnt} = !defined($ILookBackCnt) ?  3 : $ILookBackCnt;
+  $hash->{c_PID_DLookBackCnt} = !defined($DLookBackCnt) ?  1 : $DLookBackCnt;
+
+  $hash->{h_deltaTemp}      = 0 unless defined ($hash->{h_deltaTemp});
+  $hash->{h_deltaTemp_D}    = 0 unless defined ($hash->{h_deltaTemp_D});
+  #$hash->{h_pid_integrator} = 0;
+
+  if ($pid eq "") {
+
+    delete ($hash->{READINGS}{PID_PVal})        if (defined($hash->{READINGS}{PID_PVal}));
+    delete ($hash->{READINGS}{PID_IVal})        if (defined($hash->{READINGS}{PID_IVal}));
+    delete ($hash->{READINGS}{PID_DVal})        if (defined($hash->{READINGS}{PID_DVal}));
+    delete ($hash->{READINGS}{PID_PWMPulse})    if (defined($hash->{READINGS}{PID_PWMPulse}));
+    delete ($hash->{READINGS}{PID_PWMOnTime})   if (defined($hash->{READINGS}{PID_PWMOnTime}));
+ 
+    delete ($hash->{helper}{PID_D_previousTemps}) if (defined (($hash->{helper}{PID_D_previousTemps})));
+
+    #delete ($hash->{h_deltaTemp})            if (defined($hash->{h_deltaTemp}));
+    #delete ($hash->{h_pid_integrator})       if (defined($hash->{h_pid_integrator}));
+
+  } else {
+
+    ### I-Factor
+
+    # initialize if not yet done 
+    $hash->{helper}{PID_I_previousTemps} = [] unless defined (($hash->{helper}{PID_I_previousTemps}));
+
+    # shorter reference to array
+    my $IBuffer = $hash->{helper}{PID_I_previousTemps};
+    my $Icnt = ( @{$IBuffer} ); # or scalar @{$IBuffer}
+
+    # reference
+    #Log3 ($hash, 3, "org reference IBuffer is $hash->{helper}{PID_I_previousTemps} short is $IBuffer, cnt is ". scalar @{$IBuffer}." (starting from 0)");
+    Log3 ($hash, 4, "content of IBuffer is @{$IBuffer}");
+
+    # cut Buffer if it is too large
+    while (scalar @{$IBuffer} > $hash->{c_PID_DLookBackCnt}) {
+      my $v = shift @{$IBuffer};
+#      Log3 ($hash, 3, "shift $v from IBuffer");
+    }
+#    Log3 ($hash, 3, "IBuffer contains ".scalar @{$IBuffer}." elements");
+
+    ### D-Factor
+
+    # initialize if not yet done 
+    $hash->{helper}{PID_D_previousTemps} = [] unless defined (($hash->{helper}{PID_D_previousTemps}));
+
+    # shorter reference to array
+    my $DBuffer = $hash->{helper}{PID_D_previousTemps};
+    my $Dcnt = ( @{$DBuffer} ); # or scalar @{$DBuffer}
+
+    # reference
+    #Log3 ($hash, 3, "org reference DBuffer is $hash->{helper}{PID_D_previousTemps} short is $DBuffer, cnt is ". scalar @{$DBuffer}." (starting from 0)");
+    Log3 ($hash, 4, "content of DBuffer is @{$DBuffer}");
+
+#    for my $i ( 0 .. $cnt -1 ) {
+#      Log3 ($hash, 3, "value $i $DBuffer->[$i]");
+#    }
+#
+#    push @{$DBuffer}, $DBuffer->[1] + $DBuffer->[0];
+#
+#    for my $i ( 0 .. @{$DBuffer} -1 ) {
+#      Log3 ($hash, 3, "value after push $i $DBuffer->[$i]");
+#    }
+#
+#    shift @{$DBuffer};
+#
+#    for my $i ( 0 .. @{$DBuffer} -1 ) {
+#      Log3 ($hash, 3, "value after shift $i $DBuffer->[$i]");
+#    }
+
+    # cut Buffer if it is too large
+    while (scalar @{$DBuffer} > $hash->{c_PID_DLookBackCnt}) {
+      my $v = shift @{$DBuffer};
+#      Log3 ($hash, 3, "shift $v from DBuffer");
+    }
+#    Log3 ($hash, 3, "DBuffer contains ".scalar @{$DBuffer}." elements");
+
+  }
+  
+
+  ##########
+  # check sensor
+  # dummy is allowed and will be ignored
+
+  my ($sensor, $reading, $t_regexp) = split (":", $tsensor, 3);
+  if (!$defs{$sensor} && $sensor ne "dummy")
+  {
+    my $msg = "$name: Unknown sensor device $sensor specified";
+    Log3 ($hash, 3, "PWMR_Define $msg");
+    return $msg;
+  }
+
+  $sensor            =~ s/dummy//;
+  $hash->{t_sensor}    = $sensor;
+  $reading = "temperature" unless (defined($reading));
+  $hash->{t_reading}   = $reading;
+  if ( !defined($t_regexp) ) 
+  {  
+    $t_regexp = '([\\d\\.]+)'
+  }
+  $hash->{t_regexp}    = $t_regexp;
+
+  ##########
+  # check actor
+
+  my ($tactor, $a_regexp_on) = split (":", $actor, 2);
+
+  $a_regexp_on = "on" unless defined ($a_regexp_on);
+
+  $tactor              =~ s/dummy//;
+
+  if (!$defs{$tactor} && $tactor ne "dummy")
+  {
+    my $msg = "$name: Unknown actor device $tactor specified";
+    Log3 ($hash, 3, "PWMR_Define $msg");
+    return $msg;
+  }
+
+  $hash->{actor}       = $tactor;
+  $hash->{a_regexp_on} = $a_regexp_on;
+  #$hash->{actorState}  = "unknown";
+
+  readingsSingleUpdate ($hash,  "actorState", "unknown", 0);
+
+  $hash->{STATE}       = "Initialized";
+
+  # values for calculation of desired-temp
+
+  $hash->{c_frostProtect}     = 0;
+  $hash->{c_autoCalcTemp}     = 1;
+  $hash->{c_tempFrostProtect} = 6;
+  $hash->{c_tempN}            = 16;
+  $hash->{c_tempD}            = 20;
+  $hash->{c_tempC}            = 22;
+  $hash->{c_tempE}            = 19;
+  $hash->{c_tempRule1}        = "1-5 0600,D 2200,N";
+  $hash->{c_tempRule2}        = "6-0 0800,D 2200,N";
+  $hash->{c_tempRule3}        = "";
+  $hash->{c_tempRule4}        = "";
+  $hash->{c_tempRule5}        = "";
+
+  $hash->{INTERVAL}           = 300;
+
+  #AssignIoPort($hash);
+
+  # if attributes already defined then recall set for them
+  foreach my $oneattr (sort keys %{$attr{$name}})
+  {
+    PWMR_Attr ("set", $name, $oneattr, $attr{$name}{$oneattr});
+  }
+
+  if($hash->{INTERVAL}) {
+    InternalTimer(gettimeofday()+10, "PWMR_CalcDesiredTemp", $hash, 0);
+  }
+  return undef;
+}
+
+#############################
+sub PWMR_Undef($$)
+{
+  my ($hash, $args) = @_;
+
+  my $name = $hash->{NAME};
+  Log3 ($hash, 3, "PWMR Undef $name");
+
+  if ( $hash->{INTERVAL} )
+  {
+    RemoveInternalTimer($hash);
+  }
+
+  return undef;
+
+}
+
+
+#############################
+sub 
+PWMR_SetRoom(@)
+{
+  my ($room, $newState) = @_;
+
+  my $name = $room->{NAME};
+
+  Log3 ($room, 4, "PWMR_SetRoom $name <$newState>");
+
+  my $energyused = "";
+  if (defined($room->{READINGS}{energyused}{VAL})) {                                        
+    $energyused = substr ( $room->{READINGS}{energyused}{VAL}, -29);
+  }
+
+  # newState may be "", "on", "off"
+  if ($newState eq "") {
+    $energyused = $energyused.substr ( $energyused ,-1);
+  } else {
+    $energyused = $energyused.($newState eq "on" ? "1" : "0");
+  }
+
+  readingsBeginUpdate ($room);
+  readingsBulkUpdate ($room,  "energyused", $energyused);
+  readingsBulkUpdate ($room,  "energyusedp", sprintf ("%.1f", ($energyused =~ tr/1//) /30*100));
+  
+  if ($newState eq "") {
+    readingsEndUpdate($room, 1);
+    return;
+  }
+
+  if ($room->{actor})
+  {
+    my $ret = fhem sprintf ("set %s %s", $room->{actor}, $newState);
+    if (!defined($ret)) {    # sucessfull
+      Log3 ($room, 2, "PWMR_SetRoom $room->{NAME}: set $room->{actor} $newState");
+       
+      #$room->{actorState}                 = $newState;
+
+      readingsBulkUpdate ($room,  "actorState", $newState);
+      readingsBulkUpdate ($room,  "lastswitch", time());
+      readingsEndUpdate($room, 1);
+
+      push @{$room->{CHANGED}}, "actor $newState";
+      DoTrigger($name, undef);
+
+    } else {
+      Log3 ($room, 2, "PWMR_SetRoom $name: set $room->{actor} $newState failed ($ret)");
+    }
+
+  }
+}
+
+
+###################################
+sub 
+PWMR_ReadRoom(@)
+{
+  my ($room, $cycletime, $MaxPulse) = @_; # room, cylcetime for PMW Calculation (15Min), Max Time to stay on (0.00 .. 1.00)
+
+  my $name = $room->{NAME};
+  my $temperaturT;
+  my $desiredTemp;
+  my $prevswitchtimeT;
+
+  #$room->{helper}{cycletime} = $cycletime;
+
+  my ($temperaturV, $actorV, $factor, $oldpulse, $newpulse, $prevswitchtime, $windowV) = 
+    (99, "off", 0, 0, 0, 0, 0);
+
+  #Log3 ($room, 4, "PWMR_ReadRoom $name <$room->{t_sensor}> <$room->{actor}>");
+
+  if ($room->{t_sensor})
+  {
+    my $sensor   =  $room->{t_sensor};
+    my $reading  =  $room->{t_reading};
+    my $t_regexp =  $room->{t_regexp};
+
+    $temperaturV =  $defs{$sensor}->{READINGS}{$reading}{VAL};
+    $temperaturT =  $defs{$sensor}->{READINGS}{$reading}{TIME};
+
+    $temperaturV =~ s/$t_regexp/$1/;
+
+    $temperaturV = PWMR_valueFormat ($room, "temperature", $temperaturV);
+  }
+
+  if ($room->{actor})
+  {
+    # HERE
+    #$actorV    =  (($defs{$room->{actor}}->{STATE} eq "on") : "on" ? "off");
+    #$actorV    =  $defs{$room->{actor}}->{STATE};
+    
+    # until 26.01.2013 -> may be undef which forces room to be switched off first
+    #$actorV    =  $room->{actorState};
+    
+    # starting from 26.01.2013 -> try to read act status .. (may also be invalid if struct)
+    if ($defs{$room->{actor}}->{TYPE} eq "RBRelais") {
+      $actorV =  $defs{$room->{actor}}->{STATE};
+    } elsif (defined($defs{$room->{actor}}->{STATE})) {
+      $actorV =  $defs{$room->{actor}}->{STATE};
+    } else {
+      #$actorV = $room->{actorState};
+      $actorV = $room->{READINGS}{actorState};
+    } 
+
+    #my $actorVOrg = $actorV;
+    
+    my $a_regexp_on = $room->{a_regexp_on};
+    if ($actorV =~ /^$a_regexp_on$/) {
+      $actorV = "on";
+    } else {
+      $actorV = "off";
+    }
+    #Log3 ($room, 2, "$name actorV $actorV org($actorVOrg) regexp($a_regexp_on)");
+  }
+
+  if (!$room->{READINGS}{"desired-temp"}{TIME})
+  {
+    readingsSingleUpdate ($room,  "desired-temp", 6.0, 0);
+  }
+
+  if (!$room->{READINGS}{oldpulse}{TIME})
+  {
+    readingsSingleUpdate ($room,  "oldpulse", 0.0, 0);
+  }
+
+  if (!$room->{READINGS}{lastswitch}{TIME})
+  {
+    readingsSingleUpdate ($room,  "lastswitch", time(), 0);
+  }
+
+  $factor          = $room->{FACTOR};
+  $oldpulse        = $room->{READINGS}{oldpulse}{VAL};
+  $prevswitchtime  = $room->{READINGS}{lastswitch}{VAL};
+  $prevswitchtimeT = $room->{READINGS}{lastswitch}{TIME};
+
+  $windowV        = 0;
+  if ($room->{windows} && $room->{windows} ne "" && $room->{w_regexp} ne "")
+  {
+    foreach my $window (split (",", $room->{windows})) {
+      Log3 ($room, 4, "PWMR_ReadRoom $name: check window $window");
+      if (defined($room->{w_regexp}) && $room->{w_regexp} ne "") {
+        if (defined($defs{$window}) && $defs{$window}{STATE} ) {
+        
+          Log3 ($room, 5, "PWMR_ReadRoom $name: $window ($defs{$window}{STATE}/$room->{w_regexp})");
+          if ( $defs{$window}{STATE} =~ /$room->{w_regexp}/ ) {
+            $windowV = 1;
+            Log3 ($room, 3, "PWMR_ReadRoom $name: $window state: set to 1");
+          
+          }
+        }
+      }
+    }
+  }
+
+  if ($windowV > 0) {
+    $desiredTemp    = $room->{c_tempFrostProtect};
+
+  } else {
+    $desiredTemp    = $room->{READINGS}{"desired-temp"}{VAL};
+  }
+
+  my $deltaTemp    = maxNum (0, $desiredTemp - $temperaturV);
+  
+  my $factoroffset = $room->{FOFFSET};
+  
+  $newpulse        = minNum ($MaxPulse,  (( $deltaTemp * $factor) ** 2) + $factoroffset); # default 85% max ontime
+  $newpulse        = sprintf ("%.2f", $newpulse);
+
+  
+  my $PWMPulse     = $newpulse * 100;
+  my $PWMOnTime    =  sprintf ("%02s:%02s", int ($newpulse * $cycletime / 60), ($newpulse * $cycletime) % 60);
+
+  my $iodev = $room->{IODev};
+  #if ($newpulse * $defs{$iodev}->{CYCLETIME} < $defs{$iodev}->{MINONOFFTIME}) {
+  if ($newpulse * $iodev->{CYCLETIME} < $iodev->{MINONOFFTIME}) {
+	$PWMPulse = 0;
+	$PWMOnTime = "00:00";
+  }
+
+  ### PID calculation
+
+  my $DBuffer = $room->{helper}{PID_D_previousTemps};
+  push @{$DBuffer}, $temperaturV;
+
+  my $IBuffer = $room->{helper}{PID_I_previousTemps};
+  push @{$IBuffer}, $temperaturV;
+
+  # cut I-Buffer if it is too large
+  while (scalar @{$IBuffer} > $room->{c_PID_ILookBackCnt}) {
+    my $v = shift @{$IBuffer};
+    #Log3 ($room, 3, "shift $v from IBuffer");
+  }
+  #Log3 ($room, 3, "IBuffer contains ".scalar @{$IBuffer}." elements");
+
+  # cut D-Buffer if it is too large
+  while (scalar @{$DBuffer} > $room->{c_PID_DLookBackCnt}) {
+    my $v = shift @{$DBuffer};
+    #Log3 ($room, 3, "shift $v from DBuffer");
+  }
+  #Log3 ($room, 3, "DBuffer contains ".scalar @{$DBuffer}." elements");
+
+  $room->{h_PID_I_previousTemps} = join (" ", @{$IBuffer});
+  $room->{h_PID_D_previousTemps} = join (" ", @{$DBuffer});
+
+
+  my $deltaTempPID = $desiredTemp - $temperaturV;
+  $room->{h_deltaTemp}   = sprintf ("%.1f", -1 * $deltaTempPID);
+  $room->{h_deltaTemp_D} = sprintf ("%.1f", -1 * ($desiredTemp - $DBuffer->[0]));
+
+  my $ISum = 0;
+  foreach my $t (@{$IBuffer}) {
+    $ISum += ($desiredTemp - $t);
+  }
+  #$ISum = $ISum / scalar @{$IBuffer};
+  $ISum = $ISum;
+
+  #my $deltaTempPID = $desiredTemp - $temperaturV;
+  #my $IVal = $room->{c_PID_IFactor} * $deltaTempPID + $room->{h_pid_integrator};
+  
+  my $PVal = $room->{c_PID_PFactor} * $deltaTemp;
+  my $IVal = $room->{c_PID_IFactor} * $ISum;
+  my $DVal = $room->{c_PID_DFactor} * ($room->{h_deltaTemp_D} - $room->{h_deltaTemp});
+
+  $PVal    = minNum (1, sprintf ("%.2f", $PVal));
+  $IVal    = minNum (1, sprintf ("%.2f", $IVal));
+  $DVal    = minNum (1, sprintf ("%.2f", $DVal));
+
+  $IVal    = maxNum (-1, $IVal);
+
+  #$room->{h_pid_integrator} = $IVal;
+
+  my $newpulsePID  = ($PVal + $IVal + $DVal);
+  $newpulsePID     = minNum ($MaxPulse, sprintf ("%.2f", $newpulsePID));
+  $newpulsePID     = maxNum (0,         sprintf ("%.2f", $newpulsePID));
+
+  my $PWMPulsePID  = $newpulsePID * 100;
+  my $PWMOnTimePID =  sprintf ("%02s:%02s", int ($newpulsePID * $cycletime / 60), ($newpulsePID * $cycletime) % 60);
+
+
+  if ($PWMPulsePID * $iodev->{CYCLETIME} < $iodev->{MINONOFFTIME}) {
+	$PWMPulsePID = 0;
+	$PWMOnTimePID = "00:00";
+  }
+  # end PID calculation
+
+  if ($room->{c_PID_useit} >= 1) {
+    $newpulse   = $newpulsePID;
+    #$PWMPulse   = $PWMPulsePID;
+    #$PWMOnTime  = $PWMOnTimePID;
+  }
+
+  readingsBeginUpdate ($room);
+  readingsBulkUpdate ($room,  "desired-temp-used", $desiredTemp);
+  readingsBulkUpdate ($room,  "PWMOnTime", $PWMOnTime);
+  readingsBulkUpdate ($room,  "PWMPulse", $PWMPulse);
+  readingsBulkUpdate ($room,  "temperature", $temperaturV);
+
+  if ($room->{c_PID_useit} >= 0) {
+    readingsBulkUpdate ($room,  "PID_PVal", $PVal);
+    readingsBulkUpdate ($room,  "PID_IVal", $IVal);
+    readingsBulkUpdate ($room,  "PID_DVal", $DVal);
+    readingsBulkUpdate ($room,  "PID_PWMPulse", $PWMPulsePID);
+    readingsBulkUpdate ($room,  "PID_PWMOnTime", $PWMOnTimePID);
+  }
+
+  readingsEndUpdate($room, 1);
+
+  
+  Log3 ($room, 4, "PWMR_ReadRoom $name: desT($desiredTemp), actT($temperaturV von($temperaturT)), state($actorV)");
+  Log3 ($room, 4, "PWMR_ReadRoom $name: newpulse($newpulse/$PWMOnTime), oldpulse($oldpulse), lastSW($prevswitchtime = $prevswitchtimeT), window($windowV)");
+
+  return ($temperaturV, $actorV, $factor, $oldpulse, $newpulse, $prevswitchtime, $windowV);
+
+}
+  
+
+sub 
+PWMR_normTime ($)
+{
+  my ($time) = @_;
+
+  my $hour = 0;
+  my $minute = 0;
+
+  #Log 4, "normTime $time";
+
+  $time =~ /^([0-9]+):*([0-9]*)$/;
+
+  if (defined ($2) && ($2 ne "")) {  # set $minute to 0 if time was only 6 
+    $minute = $2;
+  }
+    
+  if (defined ($1)) {  # error if no hour given
+    $hour = $1
+  } else {
+    return undef;
+  }
+
+  #Log 4, "<$hour> <$minute>";
+
+  if ($hour < 0 || $hour > 23) {
+    return undef;
+  }
+  if ($minute < 0 || $minute > 59) {
+    return undef;
+  }
+
+  #Log 4, "uhrzeit $hour $minute";
+  return sprintf ("%02d%02d", $hour, $minute);
+
+}
+
+sub 
+PWMR_CheckTempRule(@)
+{
+  my ($hash, $var, $vals) = @_;
+
+  my $name = $hash->{NAME};
+  my $valid  = "";
+
+  my $usage = "usage: [Mo|Di|..|So[-Mo|-Di|..|-So] <zeit>,D|C|E|N [<zeit>,D|C|E|N] ]\n".
+  		"e.g. Mo-Fr 6:00,D 22,N\n".
+ 		"or   So 10,D 23,N";
+  
+  Log3 ($hash, 4, "PWMR_CheckTempRule: $hash->{NAME} $var <$vals>");
+
+  my @points = split (" ", $vals);
+  my $day = $points[0];
+
+  unless ( $day =~ /-/ ) {                   # normalise Mo to  Mo-Mo
+    $day = "$day-$day";
+  }
+
+  # analyse Mo-Di
+
+  my ($from, $to) = split ("-", $day);
+  $from = lc ($from);
+  $to   = lc ($to);
+  if (defined ($dayno{$from}) && defined ($dayno{$to})) {
+    $valid .= "$dayno{$from}-$dayno{$to} ";
+  } else {
+    return $usage;
+  }
+
+  Log3 ($hash, 4, "PWMR_CheckTempRule: $name day valid: $valid");
+
+  shift @points;
+
+  foreach my $point (@points) {
+    #Log3 ($hash, 4, "loop: $point");
+    my ($from, $temp) = split(",", $point);
+    $temp = uc($temp);
+    unless ($temp eq "D" || $temp eq "N" || $temp eq "C" || $temp eq "E") {   # valid temp
+      return $usage;
+    }
+ 
+    #Log3 ($hash, 4, "loop: fromto: $fromto");
+ 
+    return $usage unless ( $from = PWMR_normTime($from) );
+
+    Log3 ($hash, 4, "PWMR_CheckTempRule: $name time valid: $from,$temp");
+
+    $valid .= "$from,$temp ";
+
+
+  } 
+
+  Log3 ($hash, 4, "PWMR_CheckTempRule: $name $var <$valid>");
+
+  $hash->{$var} = $valid;
+
+  return undef
+} 
+
+sub 
+PWMR_CheckTemp(@)
+{
+  my ($hash, $var, $vals) = @_;
+
+  my $error = "valid values are 0 ... 30";
+  
+  my $name = $hash->{NAME};
+  Log3 ($hash, 4, "PWMR_CheckTemp: $name $var <$vals>");
+
+  if ($vals !~ /^[0-9]+\.{0,1}[0-9]*$/ ) {
+    return "$error";
+  } else {
+  }
+
+  if ($vals < 0 || $vals > 30) {
+    return "$error";
+  }
+
+ $hash->{$var} = $vals;
+ return undef;
+
+}
+
+sub 
+PWMR_Attr(@)
+{
+  my @a = @_;
+
+  my $name = $a[1];
+  my $hash = $defs{$name};
+  my $attr = $a[2];
+  my $val  = $a[3];
+  
+  if ($a[0] eq "del") {
+  
+    if ($attr eq "tempRule1") {
+      $hash->{c_tempRule1} = "";
+    } elsif ($attr eq "tempRule2") {
+      $hash->{c_tempRule2} = "";
+    } elsif ($attr eq "tempRule3") {
+      $hash->{c_tempRule3} = "";
+    } elsif ($attr eq "tempRule4") {
+      $hash->{c_tempRule4} = "";
+    } elsif ($attr eq "tempRule5") {
+      $hash->{c_tempRule5} = "";
+    } elsif ($attr eq "frostProtect") {
+      $hash->{c_frostProtect} = 0;
+    } elsif ($attr eq "desiredTempFrom") {
+      $hash->{c_desiredTempFrom} = "";
+      delete($hash->{d_name});
+      delete($hash->{d_reading});
+      delete($hash->{d_regexpTemp});
+    } elsif ($attr eq "autoCalcTemp") {
+      $hash->{c_autoCalcTemp} = 1;
+      $hash->{STATE}     = "Calculating";
+    } 
+
+    if ($attr eq "valueFormat" and defined ($hash->{helper}{$attr})) {
+      delete ($hash->{helper}{$attr});
+    }
+
+  
+  }
+
+  if (!defined($val)) {
+    Log3 ($hash, 4, "PWMR_Attr: $name, delete $attr ($val)");
+    return undef;
+  } else {
+    Log3 ($hash, 4, "PWMR_Attr: $name, $attr, $val");
+  }
+
+  if ($attr eq "frostProtect") {                            # frostProtect  0/1
+    if ($val eq 0 or $val eq 1) {
+      $hash->{c_frostProtect} = $val;
+    } elsif ($val eq "") {
+      $hash->{c_frostProtect} = 0;
+    } else {
+      return "valid values are 0 or 1";
+    }
+
+  } elsif ($attr eq "autoCalcTemp") {                       # autoCalcTemp 0/1
+    if ($val eq 0) {
+      $hash->{c_autoCalcTemp} = 0;
+      $hash->{STATE}     = "Manual";
+    } elsif ( $val eq 1) {
+      $hash->{c_autoCalcTemp} = 1;
+      $hash->{STATE}     = "Calculating";
+    } elsif ($val eq "") {
+      $hash->{c_autoCalcTemp} = 1;
+      $hash->{STATE}     = "Calculating";
+    } else {
+      return "valid values are 0 or 1";
+    }
+
+  } elsif ($attr eq "desiredTempFrom") {                   # desiredTempFrom
+    $hash->{c_desiredTempFrom} = $val;
+
+    my ( $d_name, $d_reading, $d_regexpTemp) = split (":", $val, 3);
+
+    # set defaults
+
+    $hash->{d_name}                = (defined($d_name)               ? $d_name                : "");
+    $hash->{d_reading}             = (defined($d_reading)            ? $d_reading             : "desired-temp");
+    $hash->{d_regexpTemp}          = (defined($d_regexpTemp)         ? $d_regexpTemp          : '(\d[\d\\.]+)');
+
+    # check if device exist 
+    unless (defined($defs{$hash->{d_name}})) {
+      return "error: $hash->{d_name} does not exist.";
+    }
+
+  } elsif ($attr eq "tempDay") {                           # tempDay
+    return PWMR_CheckTemp($hash, "c_tempD", $val);
+
+  } elsif ($attr eq "tempNight") {                         # tempNight
+    return PWMR_CheckTemp($hash, "c_tempN", $val);
+
+  } elsif ($attr eq "tempCosy") {                          # tempCosy
+    return PWMR_CheckTemp($hash, "c_tempC", $val);
+
+  } elsif ($attr eq "tempEnergy") {                        # tempEnergy
+    return PWMR_CheckTemp($hash, "c_tempE", $val);
+
+  } elsif ($attr eq "tempRule1") {                         # tempRule1
+    return PWMR_CheckTempRule($hash, "c_tempRule1", $val);
+
+  } elsif ($attr eq "tempRule2") {                         # tempRule2
+    return PWMR_CheckTempRule($hash, "c_tempRule2", $val);
+
+  } elsif ($attr eq "tempRule3") {                         # tempRule3
+    return PWMR_CheckTempRule($hash, "c_tempRule3", $val);
+
+  } elsif ($attr eq "tempRule4") {                         # tempRule4
+    return PWMR_CheckTempRule($hash, "c_tempRule4", $val);
+
+  } elsif ($attr eq "tempRule5") {                         # tempRule5
+    return PWMR_CheckTempRule($hash, "c_tempRule5", $val);
+
+  }
+
+  if ($attr eq "valueFormat") {
+    my $attrVal = $val;
+    if( $attrVal =~ m/^{.*}$/s && $attrVal =~ m/=>/ && $attrVal !~ m/\$/ ) {
+      my $av = eval $attrVal;
+      if( $@ ) {
+        Log3 ($hash->{NAME}, 3, $hash->{NAME} ." $attr: ". $@);
+      } else {
+        $attrVal = $av if( ref($av) eq "HASH" );
+      }
+      $hash->{helper}{$attr} = $attrVal;
+
+      foreach my $key (keys %{$hash->{helper}{$attr}}) {
+        Log3 ($hash->{NAME}, 3, $hash->{NAME} ." $key ".$hash->{helper}{$attr}{$key});
+      }
+
+      #return "$attr set to $attrVal";
+
+    } else {
+      # if valueFormat is not verified sucessfully ... the helper is deleted (=not used)
+      delete $hash->{helper}{$attr};
+    }
+    return undef;
+  }
+
+
+
+  return undef;
+
+}
+
+sub 
+PWMR_Boost(@)
+{
+  my ($me, $outsideSensor, $outsideMax, $deltaTemp, $desiredOffset, $boostDuration) = @_;
+  
+  return undef unless defined ($defs{$me}->{NAME});
+  
+  my $room = $defs{$me};
+  my $name = $room->{NAME};
+  
+  my $outsideTemp = 99;
+  if (defined($defs{$outsideSensor}->{READINGS}{temperature}{VAL})) {
+    $outsideTemp = $defs{$outsideSensor}->{READINGS}{temperature}{VAL};
+  }
+  
+  if ($room->{t_sensor})
+  {
+    my $sensor   =  $room->{t_sensor};
+    my $reading  =  $room->{t_reading};
+    my $t_regexp   =  $room->{t_regexp};
+
+    my $temperaturV =  $defs{$sensor}->{READINGS}{$reading}{VAL};
+    $temperaturV =~ s/$t_regexp/$1/;
+    
+    my $desiredTemp    = $room->{READINGS}{"desired-temp"}{VAL};
+    
+    # boost necessary?
+    if (($outsideTemp < $outsideMax)
+     && ($temperaturV <= $desiredTemp - $deltaTemp)) {
+     
+      Log3 ($room, 3, "PWMR_Boost: $name ".
+        "($outsideTemp, $outsideMax, $deltaTemp, $desiredOffset, $boostDuration) ".
+        "temp($temperaturV) desired-temp($desiredTemp) -> boost");
+        
+      my $now =  time();
+
+      readingsBeginUpdate ($room);
+      readingsBulkUpdate ($room,  "desired-temp", $desiredTemp + $desiredOffset);
+      readingsBulkUpdate ($room,  "desired-temp-until", FmtDateTime($now + $boostDuration * 60));
+      readingsEndUpdate($room, 1);
+
+      #$room->{READINGS}{"desired-temp"}{TIME} = FmtDateTime($now + $boostDuration * 60);
+      #$room->{READINGS}{"desired-temp"}{VAL} = $desiredTemp + $desiredOffset;
+
+      #my $t = $room->{READINGS}{"desired-temp"}{VAL};
+      #push @{$room->{CHANGED}}, "desired-temp $t";
+      #DoTrigger($name, undef);
+
+      Log3 ($room, 4, "PWMR_Boost: $name ".
+        "set desired-temp ".$room->{READINGS}{"desired-temp"}{TIME}." for ".
+        $room->{READINGS}{"desired-temp"}{VAL});
+        
+    } else {
+      Log3 ($room, 3, "PWMR_Boost: $name ".
+        "($outsideTemp, $outsideMax, $deltaTemp, $desiredOffset, $boostDuration) ".
+        "temp($temperaturV) desired-temp($desiredTemp) -> do nothing");
+    }
+  
+    
+  } else {
+    Log3 ($room, 3, "PWMR_Boost: $name warning: no sensor.");
+  }
+  
+  
+  return undef;
+}
+
+sub 
+PWMR_valueFormat(@)
+{
+  my ($hash, $reading, $value) = @_;
+
+  return $value unless (defined ($reading));
+ 
+  if (ref($hash->{helper}{valueFormat}) eq 'HASH')
+  {
+     
+    if (exists($hash->{helper}{valueFormat}->{$reading})) {
+
+      my $vf = $hash->{helper}{valueFormat}->{$reading};
+      return sprintf ("$vf", $value);
+    }
+  }
+
+  return $value;
+
+}
+
+1;
+
+=pod
+=item device
+=item summary Device for room temperature control using PWM. See also 94_PWM.pm 
+=begin html
+
+<a name="PWMR"></a>
+<h3>PWMR</h3>
+<ul>
+
+  <table>
+  <tr><td>
+  The PMWR module defines rooms to be used for calculation within module PWM.<br><br>
+  PWM is based on Pulse Width Modulation which means valve position 70% is implemented in switching the device on for 70% and off for 30% in a given timeframe.<br>
+  PWM defines a calculation unit and depents on objects based on PWMR which define the rooms to be heated.<br>
+  PWMR objects calculate a desired temperature for a room based on several rules, define windows, a temperature sensor and an actor to be used to switch on/off heating.
+  <br>
+  </td></tr>
+  </table>
+
+  <b>Define</b>
+  <ul>
+    <code>define &lt;name&gt; PWMR &lt;IODev&gt; &lt;factor[,offset]&gt; &lt;tsensor[:reading:[t_regexp]]&gt; &lt;actor&gt;[:&lt;a_regexp_on&gt;] [&lt;window|dummy&gt;[,&lt;window&gt;[:&lt;w_regexp&gt;]] [&lt;usePID 0|1&gt;:&lt;PFactor&gt;:&lt;IFactor&gt;[,&lt;ILookBackCnt&gt;]:&lt;DFactor&gt;,[&lt;DLookBackCnt&gt;]<br></code>
+
+    <br>
+    Define a calculation object with the following parameters:<br>
+    <ul>
+    <li>IODev<br>
+      Reference to an object of TYPE PWM. This object will switch on/off heating.<br>
+    </li>
+
+    <li>factor[,offset]<br>
+      Pulse for PWM will be calculated as ((delta-temp * factor) ** 2) + offset.<br>
+      <i>offset</i> defaults to 0.11<br>
+      <i>factor</i> can be used to weight rooms.<br>
+    </li>
+
+    <li>tsensor[:reading[:t_regexp]]<br>
+      <i>tsensor</i> defines the temperature sensor for the actual room temperature.<br>
+      <i>reading</i> defines the reading of the temperature sensor. Default is "temperature"<br>
+      <i>t_regexp</i> defines a regular expression to be applied to the reading. Default is '(\d[\d\.]+)'.<br>
+    </li>
+
+    <li>actor[:&lt;a_regexp_on&gt;]<br>
+      The actor will be set to "on" of "off" to turn on/off heating.<br>
+      <i>a_regexp_on</i> defines a regular expression to be applied to the state of the actor. Default is 'on". If state matches the regular expression it is handled as "on", otherwise "off"<br>
+    </li>
+
+    <li>&lt;window|dummy&gt;[,&lt;window&gt;[:&lt;w_regexp&gt;]<br>
+      <i>window</i> defines several window devices that can prevent heating to be turned on.<br>
+      If STATE matches the regular expression then the desired-temp will be decreased to frost-protect temperature.<br>
+      'dummy' can be used as a neutral value for window and will be ignored when processing the configuration.<br>
+      <i>w_regexp</i> defines a regular expression to be applied to the reading. Default is '.*Open.*'.<br>
+    </li>
+
+    <li>&lt;usePID 0|1&gt;:&lt;PFactor&gt;:&lt;IFactor&gt;[,&lt;ILookBackCnt&gt;]:&lt;DFactor&gt;[,&lt;DLookBackCnt&gt;]<br>
+      <i>usePID 0|1</i>: 0 .. calculate Pulse based on PID but do not use it. 1 .. calculate Pulse based on PID and use it.<br>
+      <i>PFactor</i>: Konstant for P.<br>
+      <i>IFactor</i>: Konstant for I.<br>
+      <i>DFactor</i>: Konstant for D.<br> 
+      <i>ILookBackCnt</i>: Buffer size to store previous temperatures. For I calculation all values will be used. Default is 3.<br> 
+      <i>DLookBackCnt</i>: Buffer size to store previous temperatures. For D calculation actual and oldest temperature will be used. Default is 1.<br> 
+      Internals c_PID_PFactor, c_PID_IFactor, c_PID_DFactor and c_PID_useit will reflect the above configuration values.<br>
+      Internals h_deltaTemp h_deltaTemp_D store the values needed for calculation of the next PID value.<br>
+      Readings PID_DVal, PID_IVal, PID_PVal, PID_PWMOnTime and PID_PWMPulse will reflect the actual calculated PID values and Pulse.<br>
+    </li>
+
+    </ul>
+
+    <br>
+    Example:<br>
+    <br>
+    <code>define roomKitchen PWMR fh 1,0 tempKitchen relaisKitchen</code><br>
+    <code>define roomKitchen PWMR fh 1,0 tempKitchen relaisKitchen windowKitchen1,windowKitchen2</code><br>
+    <code>define roomKitchen PWMR fh 1,0 tempKitchen relaisKitchen windowKitchen1,windowKitchen2:.*Open.*</code><br>
+    <code>define roomKitchen PWMR fh 1,0 tempKitchen relaisKitchen windowKitchen1,windowKitchen2</code> 0:0.8:1:0<br>
+    <code>define roomKitchen PWMR fh 1,0 tempKitchen relaisKitchen dummy 0:0.8:1:0</code><br>
+    <code>define roomKitchen PWMR fh 1,0 tempKitchen relaisKitchen dummy 1:0.8:1:0</code><br>
+    <br>
+       
+
+  </ul>
+  <br>
+
+  <b>Set </b>
+  <ul>
+    <li>factor<br>
+        Temporary change of parameter <i>factor</i>.
+        </li><br>
+
+    <li>actor<br>
+        Set the actor state for this room to <i>on</i> or <i>off</i>. This is only a temporary change that will be overwritten by PWM object.
+        </li><br>
+
+    <li>desired-temp<br>
+        If <i>desired-temp</i> is automatically calculated (attribute <i>autoCalcTemp</i> not set or 1) then the desired temperature is set for a defined time.<br>
+        Default for this period is 60 minutes, but it can be changed by attribute <i>autoCalcTemp</i>.<br>
+        If <i>desired-temp</i> is not automatically calculated (attribute <i>autoCalcTemp</i> is 0) then this will set the actual target temperature.<br>
+        </li><br>
+
+    <li>manualTempDuration<br>
+        Define the period how long <i>desired-temp</i> manually set will be valid. Default is 60 Minutes.<br>
+        </li><br>
+
+    <li>interval<br>
+        Temporary change <i>INTERVAL</i> which defines how often <i>desired-temp</i> is calculated in autoCalcMode. Default is 300 seconds (5:00 Minutes).
+        </li><br>
+
+    <li>frostProtect<br>
+        Sets attribute frostProtect to 1 (on) or 0 (off).
+        </li><br>
+
+
+  </ul>
+
+  <br>
+
+  <b>Attributes</b>
+  <ul>
+    <li>frostProtect<br>
+        Switch on (1) of off (0) frostProtectMode. <i>desired-temp</i> will be set to <i>tempFrostProtect</i> in autoCalcMode.
+        </li><br>
+
+    <li>autoCalcTemp<br>
+        Switch on (1) of off (0) autoCalcMode. <i>desired-temp</i> will be set based on the below temperatures and rules in autoCalcMode.<br>
+        Default is on.
+        </li><br>
+
+    <li>tempDay<br>
+        Define day temperature. This will be referenced as "D" in the rules.
+        </li><br>
+
+    <li>tempNight<br>
+        Define night temperature. This will be referenced as "N" in the rules.
+        </li><br>
+
+    <li>tempCosy<br>
+        Define cosy temperature. This will be referenced as "C" in the rules.
+        </li><br>
+
+    <li>tempEnergy<br>
+        Define energy saving temperature. This will be referenced as "E" in the rules.
+        </li><br>
+
+    <li>tempFrostProtect<br>
+        Define temperature for frostProtectMode. See also <i>frostProtect</i>.
+        </li><br>
+
+    <li>tempRule1 ... tempRule5<br>
+        Rule to calculate the <i>desired-temp</i> in autoCalcMode.<br>
+        Format is: &lt;weekday&gt;[-&lt;weekday] &lt;time&gt;,&lt;temperatureSelector&gt;<br>
+        weekday is one of Mo,Di,Mi,Do,Fr,Sa,So<br>
+        time is in format hh:mm, e.g. 7:00 or 07:00<br>
+        temperatureSelector is one of D,N,C,E<br>
+        <br>
+        Predefined are:<br>
+        tempRule1: Mo-Fr 6:00,D 22:00,N<br>
+        tempRule2: Sa-So 8:00,D 22:00,N<br>
+        This results in tempDay 6:00-22:00 from Monday to Friday and tempNight outside this time window.<br>
+        </li><br>
+
+    <li>desiredTempFrom<br>
+        This can be used as an alternative instead of the calculation of desired-temp based on the tempRules - which will happen when autoCalcTemp is set to '1'.<br>
+	(Either by removing the attribute autoCalcTemp or explicitly setting it to '1'.).<br>
+        If set correctly the desired-temp will be read from a reading of another device.<br>
+        Format is &lt;device&gt;[:&lt;reading&gt;[:&lt;regexp&gt;]]<br>
+        <i>device</i> defines the reference to the other object.<br>
+        <i>reading</i> defines the reading that contains the value for desired-temp. Default is 'desired-temp'.<br>
+        <i>regexp</i> defines a regular expression to extract the value used for 'desired-temp'. Default is '(\d[\d\.]+)'. 
+        If <i>regexp</i> does not match (e.g. reading is 'off') then tempFrostProtect is used.<br> 
+        Internals c_desiredTempFrom reflects the actual setting and d_name, d_reading und d_regexpTemp the values used.<br>
+        If this attribute is used then state will change from "Calculating" to "From &lt;device&gt;".<br>
+        Calculation of desired-temp is (like when using tempRules) based on the interval specified for this device (default is 300 seconds).
+        </li><br>
+
+    <li>valueFormat<br>
+        Defines a map to format values within PWMR.<br>
+        The following reading can be formated using syntax of sprinf: temperature
+	<br>
+        Example: { "temperature" => "%0.2f" }
+        </li><br>
+
+  </ul>
+  <br>
+</ul>
+
+=end html
+=cut