new protocol 115 for Bresser 6-in-1 and new 5-in-1 Comfort Wetter Cen…

…ter (#1010)

* 00_SIGNALduino.pm - add rfmode Bresser_6in1
* 14_SD_WS.pm - add protocol 115
* SD_ProtocolData.pm - add definition for protocol 115
* SD_Protocols.pm - add check for Bresser 6-in-1
* README.md - add entry for Bresser 6-in-1 Comfort Wetter Center 
Co-authored-by: sidey79 <7968127+sidey79@users.noreply.github.com>
* 02_ConvBresser_6in1.t - Added test for new sub
* SD_Protocols.pm - Error messaage adapted like other subs
* SD_Protocolst - Testdata corrected

CHANGED

@@ -1,46 +1,37 @@
-2021-08-18 - Update protocol 64 for sensor WH2A (#1009)
 
+2021-08-18 - Update protocol 64 for sensor WH2A (#1009)
   SD_ProtocolData.pm - correction length_max
   14_SD_WS.pm - fix sub SD_WS_Parse, changes due to perlcritic
   README.md - change of entry WH2
 
 2021-08-14 - SIGNALduino_calcRSSI check input parameter (#1007)
-
 * 02_SIGNALduino_calcRSSI.t:
-
 - Test extended
 - Bug reproduced
-
 * 00_SIGNALduino.pm
-
 - SIGNALduino_calcRSSI Check input parameters
+
 2021-08-13 - Fixes perlcritic return undef in 14_SD_WS (#1006)
-2021-08-11 - Fixes perlcritic return undef; (#979)
 
+2021-08-11 - Fixes perlcritic return undef; (#979)
 14_BresserTemeo.pm:
    Fixes perlcritic return undef;
-
 14_SD_RSL.pm:
    Fixes perlcritic return undef;
-
 14_SD_WS.pm:
    Fixes perlcritic return undef;
-
 14_SD_WS09.pm:
    Fixes perlcritic return undef;
-
 41_OREGON.pm:
    Fixes perlcritic return undef;
-2021-08-08 - new protocol 114 for TR401 (#1002)
-
-2021-08-06 - new protocol 114 for TR401 ( #1002  )
 
+2021-08-08 - new protocol 114 for TR401 (#1002)
  * 00_SIGNALduino.pm:   added protocol 114 to SD_UT match
  * SD_ProtocolData.pm:   added protocol 114
  * 14_SD_UT.pm:  added model TR401
  * README.md: Updated
-2021-08-08 - new protocol 113 for GFGT 433 B1 Wireless Grill Thermometer (#1003)
 
+2021-08-08 - new protocol 113 for GFGT 433 B1 Wireless Grill Thermometer (#1003)
  * SD_ProtocolData.pm - Definition for protocol 113 added
  * 14_SD_WS.pm - Demodulation for protocol 113 added
  * README.md - Entry for GFGT 433 B1 added 

FHEM/00_SIGNALduino.pm

@@ -1,4 +1,4 @@
-# $Id: 00_SIGNALduino.pm v3.5.2 2021-08-13 20:19:26Z sidey79 $
+# $Id: 00_SIGNALduino.pm v3.5.2 2021-08-29 21:54:48Z elektron-bbs $
 #
 # v3.5.2 - https://github.com/RFD-FHEM/RFFHEM/tree/master
 # The module is inspired by the FHEMduino project and modified in serval ways for processing the incoming messages
@@ -39,7 +39,7 @@ use List::Util qw(first);
 
 
 use constant {
-  SDUINO_VERSION                  => '3.5.2+20210813',  # Datum wird automatisch bei jedem pull request aktualisiert
+  SDUINO_VERSION                  => '3.5.2+20210829',  # Datum wird automatisch bei jedem pull request aktualisiert
   SDUINO_INIT_WAIT_XQ             => 1.5,     # wait disable device
   SDUINO_INIT_WAIT                => 2,
   SDUINO_INIT_MAXRETRY            => 3,
@@ -272,7 +272,7 @@ my %matchListSIGNALduino = (
 my %symbol_map = (one => 1 , zero =>0 ,sync => '', float=> 'F', 'start' => '');
 
 ## rfmode for attrib & supported rfmodes
-my @rfmode = ('Avantek','Bresser_5in1','KOPP_FC','Lacrosse_mode1','Lacrosse_mode2','Lacrosse_mode4','PCA301','SlowRF');
+my @rfmode = ('Avantek','Bresser_5in1','Bresser_6in1','KOPP_FC','Lacrosse_mode1','Lacrosse_mode2','Lacrosse_mode4','PCA301','SlowRF');
 
 ############################# package main
 sub SIGNALduino_Initialize {
@@ -4756,6 +4756,12 @@ USB-connected devices (SIGNALduino):<br>
   <li>rfmode<br>
     Configures the RF transceiver of the SIGNALduino (CC1101). The available arguments:
     <ul>
+      <li>Bresser_5in1<br>
+        modulation 2-FSK, Datarate=8.23 kbps, Sync Word=2DD4, FIFO-THR=28 Byte, frequency 868.35 MHz
+      </li>
+      <li>Bresser_6in1<br>
+        modulation 2-FSK, Datarate=8.23 kbps, Sync Word=2DD4, FIFO-THR=20 Byte, frequency 868.35 MHz
+      </li>
       <li>KOPP_FC<br>
         modulation GFSK, Datarate=4.7855 kbps, Sync Word=AA54, frequency 868.3MHz
       </li>
@@ -5297,6 +5303,12 @@ USB-connected devices (SIGNALduino):<br>
   <li>rfmode<br>
     Konfiguriert den RF Transceiver des SIGNALduino (CC1101). Verf&uuml;gbare Argumente sind:
     <ul>
+      <li>Bresser_5in1<br>
+        Modulation 2-FSK, Datenrate=8.23 kbps, Sync Word=2DD4, FIFO-THR=28 Byte, Frequenz 868.35 MHz
+      </li>
+      <li>Bresser_6in1<br>
+        Modulation 2-FSK, Datenrate=8.23 kbps, Sync Word=2DD4, FIFO-THR=20 Byte, Frequenz 868.35 MHz
+      </li>
       <li>KOPP_FC<br>
         Modulation GFSK, Datenrate=4.7855 kbps, Sync Word=AA54, Frequenz 868.3MHz
       </li>

FHEM/14_SD_WS.pm

@@ -1,4 +1,4 @@
-# $Id: 14_SD_WS.pm 21666 2021-08-17 19:14:52Z elektron-bbs $
+# $Id: 14_SD_WS.pm 21666 2021-08-29 21:54:48Z elektron-bbs $
 #
 # The purpose of this module is to support serval
 # weather sensors which use various protocol
@@ -34,6 +34,7 @@
 # 03.06.2021 PerlCritic - HardTabs durch Leerzeichen ersetzt & Einrueckungen sortiert (keine Code/Syntaxaenderung vorgenommen)
 # 06.06.2021 neues Protokoll 111: TS-FT002 Water tank level monitor with temperature
 # 16.07.2021 neues Protokoll 113: Wireless Grill Thermometer, Model name: GFGT 433 B1
+# 31.07.2021 neues Protokoll 115: Bresser 6-in-1 Comfort Wetter Center
 
 package main;
 
@@ -87,6 +88,7 @@ sub SD_WS_Initialize($)
     'SD_WS_110_TR.*'  => { ATTR => 'event-min-interval:.*:300 event-on-change-reading:.*', FILTER => '%NAME', GPLOT => 'temp4:Temp,', autocreateThreshold => '3:180'},
     'SD_WS_111_TL.*'   => { ATTR => 'event-min-interval:.*:300 event-on-change-reading:.*', FILTER => '%NAME', GPLOT => 'temp4:Temp,', autocreateThreshold => '3:600'},
     'SD_WS_113_T.*'   => { ATTR => 'event-min-interval:.*:60 event-on-change-reading:.*', FILTER => '%NAME', GPLOT => 'temp4:Temp,', autocreateThreshold => '10:180'},
+    'SD_WS_115.*'     => { ATTR => 'event-min-interval:.*:300 event-on-change-reading:.*', FILTER => '%NAME', GPLOT => 'temp4hum4:Temp/Hum,', autocreateThreshold => '5:120'},
   };
   return;
 }
@@ -156,6 +158,7 @@ sub SD_WS_Parse($$)
   my $sendCounter;
   my $beep;
   my $distance;
+  my $uv;
 
   my %decodingSubs  = (
     50 => # Protocol 50
@@ -887,6 +890,83 @@ sub SD_WS_Parse($$)
                           },
         crcok      => sub {return 1;}, # Check could not be determined yet.
     } ,
+    115 => {
+        # https://github.com/merbanan/rtl_433/blob/master/src/devices/bresser_6in1.c
+        # The compact 6-in-1 multifunction outdoor sensor transmits the data on 868.3 MHz.
+        # The device uses FSK-PCM encoding, the device sends a transmission every 12 seconds.
+        # There are at least two different message types:
+        # temperatur, hum, uv and rain (alternating messages)
+        # wind data (every message)
+        # A transmission starts with a preamble of 0xAA.
+        # Preamble: aa aa aa aa aa 2d d4
+        #
+        #           1         2         3         
+        # 0123456789012345678901234567890123456789
+        # ----------------------------------------
+        # 3DA820B00C1618FFFFFF1808152294FFF01E0000  Msg 1, 40 Nibble from SIGNALduino, T: 15.2 H: 94 G:0 W: 0 D:180
+        # CCCCIIIIIIIIFFGGGWWWDDD?TTT?HH????SS      Msg 1, 36 Nibble 
+        # CCCCIIIIIIIIFFGGGWWWDDD?ffRRRRVVV?SS      Msg 2, 36 Nibble 
+        # C = CRC16
+        # I = station ID
+        # F = flags, 4 bit (1: weather station, 2: indoor?, 4: soil probe), 1 bit battery (1=ok, 0=low), 3 bit channel
+        # G = wind gust in 1/10 m/s, inverted, BCD coded, GGG = FE6 =~ 019 => 1.9 m/s.
+        # W = wind speed in 1/10 m/s, inverted, BCD coded, LSB first nibble, MSB last two nibble, WWW = EFE =~ 101 => 1.1 m/s.
+        # D = wind direction in grad, BCD coded, DDD = 158 => 158 °
+        # ? = unknown, always 0x8
+        # T = temperature in 1/10 °C, only if byte 12 ne 0xFF, BCD coded, TTT = 312 => 31.2 °C
+        # ? = unknown
+        # H = humidity in percent, only if byte 12 ne 0xFF, BCD coded, HH = 23 => 23 %
+        # R = rain counter, only if byte 12 eq 0xFF, inverted, BCD coded
+        # V = uv, only if byte 12 eq 0xFF and byte 15/16 not 0xFF01, inverted, BCD coded
+        # ? = unknown
+        # S = checksum (sum over byte 2 - 17 must be 255)
+        sensortype => 'Bresser_6in1, new Bresser_5in1',
+        model      => 'SD_WS_115',
+        prematch   => sub { return 1; }, # no precheck known
+        id         => sub {my ($rawData,undef) = @_; return substr($rawData,4,8); },
+        bat        => sub {my (undef,$bitData) = @_; return substr($bitData,52,1) eq '1' ? 'ok' : 'low';},
+        channel    => sub {my (undef,$bitData) = @_; return (SD_WS_binaryToNumber($bitData,53,55));},
+        windgust   => sub {my ($rawData,undef) = @_;
+                            $windgust = substr($rawData,14,3);
+                            $windgust =~ tr/0123456789ABCDEF/FEDCBA9876543210/;
+                            return if ($windgust !~ m/^\d+$/xms);
+                            return $windgust * 0.1;
+                          },
+        windspeed  => sub {my ($rawData,undef) = @_;
+                            $windspeed = substr($rawData,18,2) . substr($rawData,17,1);
+                            $windspeed =~ tr/0123456789ABCDEF/FEDCBA9876543210/;
+                            return if ($windspeed !~ m/^\d+$/xms);
+                            return $windspeed * 0.1;
+                          },
+        winddir    => sub {my ($rawData,undef) = @_;
+                            $winddir = substr($rawData,20,3);
+                            return if ($winddir !~ m/^\d+$/xms);
+                            return ($winddir * 1, $winddirtxtar[round(($winddir / 22.5),0)]);
+                          },
+        temp       => sub {my ($rawData,undef) = @_;
+                            return if (substr($rawData,24,2) eq 'FF');
+                            $rawTemp =  (substr($rawData,24,1) . substr($rawData,25,1) . substr($rawData,26,1)) * 0.1;
+                            if ($rawTemp > 60) {$rawTemp -= 100};
+                            return $rawTemp;
+                          },
+        hum        => sub {my ($rawData,undef) = @_;
+                            return if (substr($rawData,24,2) eq 'FF');
+                            return substr($rawData,28,2) + 0;
+                          },
+        rain       => sub {my ($rawData,undef) = @_;
+                            return if (substr($rawData,24,2) ne 'FF');
+                            $rain = substr($rawData,26,4);
+                            $rain =~ tr/0123456789ABCDEF/FEDCBA9876543210/;
+                            return $rain * 0.1;
+                          },
+        uv         => sub {my ($rawData,undef) = @_;
+                            return if (substr($rawData,24,2) ne 'FF' || substr($rawData,30,3) !~ m/^\d+$/xms);
+                            $uv = substr($rawData,30,3);
+                            return if ($uv !~ m/^\d+$/xms);
+                            return $uv * 0.1;
+                          },
+        crcok      => sub {return 1;}, # checks are in SD_Protocols.pm sub ConvBresser_6in1
+    },
   );
 
   Log3 $name, 4, "$name: SD_WS_Parse protocol $protocol, rawData $rawData";
@@ -1220,6 +1300,7 @@ sub SD_WS_Parse($$)
     $sendmode = $decodingSubs{$protocol}{sendmode}->( $rawData,$bitData ) if (exists($decodingSubs{$protocol}{sendmode}));
     $trend = $decodingSubs{$protocol}{trend}->( $rawData,$bitData ) if (exists($decodingSubs{$protocol}{trend}));
     $distance = $decodingSubs{$protocol}{distance}->( $rawData,$bitData ) if (exists($decodingSubs{$protocol}{distance}));
+    $uv = $decodingSubs{$protocol}{uv}->( $rawData,$bitData ) if (exists($decodingSubs{$protocol}{uv}));
     Log3 $iohash, 4, "$name: SD_WS_Parse decoded protocol-id $protocol ($SensorTyp), sensor-id $id";
   }
   else {
@@ -1394,6 +1475,7 @@ sub SD_WS_Parse($$)
   readingsBulkUpdate($hash, "rain_total", $rain_total)  if (defined($rain_total));
   readingsBulkUpdate($hash, "sendCounter", $sendCounter)  if (defined($sendCounter));
   readingsBulkUpdate($hash, "distance", $distance)  if (defined($distance));
+  readingsBulkUpdate($hash, "uv", $uv)  if (defined($uv));
   readingsEndUpdate($hash, 1); # Notify is done by Dispatch
 
   return $name;
@@ -1488,7 +1570,7 @@ sub SD_WS_WH2SHIFT($){
     <li>ADE WS1907 Weather station with rain gauge</li>
     <li>Atech wireless weather station</li>
     <li>BBQ temperature sensor GT-TMBBQ-01s (transmitter), GT-TMBBQ-01e (receiver)</li>
-    <li>Bresser 5-in-1 Comfort Weather Center, 7009994, Professional rain gauge, Temeo</li>
+    <li>Bresser 5-in-1 and 6-in-1 Comfort Weather Center, 7009994, Professional rain gauge, Temeo</li>
     <li>Conrad S522</li>
     <li>EuroChron EFTH-800, EFS-3110A (temperature and humidity sensor)</li>
     <li>NC-3911, NC-3912 refrigerator thermometer</li>
@@ -1543,7 +1625,7 @@ sub SD_WS_WH2SHIFT($){
     <li>temperature (&deg;C)</li>
     <li>temperatureTrend (consistent, rising, falling)</li>
     <li>type (type of sensor)</li>
-    <li>windDirectionDegree (Wind direction, 0-337,5°, in steps of 22,5°)</li>
+    <li>windDirectionDegree (Wind direction, grad)</li>
     <li>windDirectionText (Wind direction, N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW)</li>
     <li>windGust (Gust of wind, m/s)</li>
     <li>windSpeed (Wind speed, m/s)</li>
@@ -1607,7 +1689,7 @@ sub SD_WS_WH2SHIFT($){
     <li>ADE WS1907 Wetterstation mit Regenmesser</li>
     <li>Atech Wetterstation</li>
     <li>BBQ Temperatur Sensor GT-TMBBQ-01s (Sender), GT-TMBBQ-01e (Empfaenger)</li>
-    <li>Bresser 5-in-1 Comfort Wetter Center, 7009994, Profi Regenmesser, Temeo</li>
+    <li>Bresser 5-in-1 und 6-in-1 Comfort Wetter Center, 7009994, Profi Regenmesser, Temeo</li>
     <li>Conrad S522</li>
     <li>EuroChron EFTH-800, EFS-3110A (Temperatur- und Feuchtigkeitssensor)</li>
     <li>Kabelloses Grillthermometer, Modellname: GFGT 433 B1</li>
@@ -1663,7 +1745,7 @@ sub SD_WS_WH2SHIFT($){
     <li>temperature (Temperatur &deg;C)</li>
     <li>temperatureTrend (Trend Temperatur gleichbleibend, steigend, fallend)</li>
     <li>type (Sensortypen)</li>
-    <li>windDirectionDegree (Windrichtung, 0-337,5°, in Schritten von 22,5°)</li>
+    <li>windDirectionDegree (Windrichtung, Grad)</li>
     <li>windDirectionText (Windrichtung, N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW)</li>
     <li>windGust (Windboe, m/s)</li>
     <li>windSpeed (Windgeschwindigkeit, m/s)</li>

FHEM/lib/SD_ProtocolData.pm

@@ -1,5 +1,5 @@
 ###########################################################################################################################################
-# $Id: SD_ProtocolData.pm 3.4.4 2021-08-17 19:14:52Z elektron-bbs $
+# $Id: SD_ProtocolData.pm 3.4.4 2021-08-29 21:54:48Z elektron-bbs $
 # The file is part of the SIGNALduino project.
 # All protocol definitions are contained in this file.
 #
@@ -86,7 +86,7 @@ package lib::SD_ProtocolData;
   use strict;
   use warnings;
 
-  our $VERSION = '1.34';
+  our $VERSION = '1.35';
 
   our %protocols = (
     "0" =>  ## various weather sensors (500 | 9100)
@@ -2983,9 +2983,26 @@ package lib::SD_ProtocolData;
         length_min      => '12',
         length_max      => '12',
       },
-
-    # "115" => reserved @elektron-bbs
-
+    "115" =>  ## BRESSER 6-in-1 Weather Center, Bresser new 5-in-1 sensors 7002550
+              # https://github.com/RFD-FHEM/RFFHEM/issues/607#issuecomment-888542022 @ Alex-S1981 2021-07-28
+              # The sensor alternately sends two different messages every 12 seconds.
+              # T: 15.2 H: 93 W: 0.8   MN;D=3BF120B00C1618FF77FF0458152293FFF06B0000;R=242;
+              # W: 0.6 R: 5.6          MN;D=1E6C20B00C1618FF99FF0458FFFFA9FF015B0000;R=241;
+      {
+        name            => 'Bresser 6in1',
+        comment         => 'BRESSER 6-in-1 weather center',
+        id              => '115',
+        knownFreqs      => '868.35',
+        datarate        => '8.207',
+        sync            => '2DD4',
+        modulation      => '2-FSK',
+        rfmode          => 'Bresser_6in1',
+        register        => ['0001','0246','0344','042D','05D4','06FF','07C0','0802','0D21','0E65','0FE8','1088','114C','1202','1322','14F8','1551','1916','1B43','1C68'],
+        preamble        => 'W115#',
+        clientmodule    => 'SD_WS',
+        length_min      => '36',
+        method          => \&lib::SD_Protocols::ConvBresser_6in1,
+      },
     ########################################################################
     #### ###  register informations from other hardware protocols  #### ####
 

FHEM/lib/SD_Protocols.pm

@@ -1793,6 +1793,41 @@ sub ConvBresser_5in1 {
   return substr($hexData, 28, 24);
 }
 
+=item ConvBresser_6in1()
+
+This function checks CRC16 over bytes 2 - 17 and sum over bytes 2 - 17 (must be 255).
+
+Input:  $hexData
+Output: $hexData
+        scalar converted message on success 
+        or array (1,"Error message")
+
+=cut
+
+sub ConvBresser_6in1 {
+  my $self    = shift // carp 'Not called within an object';
+  my $hexData = shift // croak 'Error: called without $hexdata as input';
+  my $hexLength = length ($hexData);
+
+  return ( 1, 'ConvBresser_6in1, hexData is to short' ) if ( $hexLength < 36 ); # check double, in def length_min set
+
+  my $crc = substr( $hexData, 0, 4 );
+  my $ctx = Digest::CRC->new(width => 16, poly => 0x1021);
+  my $calcCrc = sprintf( "%04X", $ctx->add( pack 'H*', substr( $hexData, 4, 30 ) )->digest );
+  $self->_logging(qq[ConvBresser_6in1, calcCRC16 = 0x$calcCrc, CRC16 = 0x$crc],5);
+  return ( 1, qq[ConvBresser_6in1, checksumCalc:0x$calcCrc != checksum:0x$crc] ) if ($calcCrc ne $crc);
+
+  my $sum = 0;
+  for (my $i = 2; $i < 18; $i++) {
+    $sum += hex(substr($hexData,($i) * 2, 2));
+  }
+  $sum &= 0xFF;
+  $self->_logging(qq[ConvBresser_6in1, sum = $sum],5);
+  return ( 1, qq[ConvBresser_6in1, sum $sum != 255] ) if ($sum != 255);
+
+  return $hexData;
+}
+
 ############################# package lib::SD_Protocols, test exists
 =item ConvPCA301()
 

README.md

@@ -23,7 +23,7 @@ Supported Devices / Protocols
 |BF-301 | Remote control|
 |benon (Semexo OHG) | Remote control (BH-P)|
 |BOSCH / Neff / Refsta Topdraft | Remote control (SF01 01319004, SF01 01319004 v2)|
-|BRESSER 5-in-1, Professional Rain Gauge, TemeoTrend | Weather Station, Rain Gauge, Thermo-/Hygro Sensor |
+|BRESSER 5-in-1, 6-in-1, Professional Rain Gauge, TemeoTrend | Weather Station, Rain Gauge, Thermo-/Hygro Sensor |
 |CAME TOP 432EV | Remote control |
 |CTW600, WH1080, WH2315 | Weather station |
 |Clarus | remote power socket|

controls_signalduino.txt

@@ -1,4 +1,4 @@
-UPD 2021-08-14_10:14:35 228769 FHEM/00_SIGNALduino.pm
+UPD 2021-08-29_20:30:08 229349 FHEM/00_SIGNALduino.pm
 UPD 2020-06-15_17:41:39 17876  FHEM/10_FS10.pm
 UPD 2020-05-26_11:51:12 20465  FHEM/10_SD_GT.pm
 UPD 2021-08-11_21:38:30 10096  FHEM/14_BresserTemeo.pm
@@ -8,11 +8,11 @@ UPD 2020-10-03_11:48:15 11170  FHEM/14_SD_AS.pm
 UPD 2021-07-13_20:29:34 29223  FHEM/14_SD_BELL.pm
 UPD 2021-08-11_21:38:30 12573  FHEM/14_SD_RSL.pm
 UPD 2021-08-08_19:14:43 167137 FHEM/14_SD_UT.pm
-UPD 2021-08-18_20:38:01 95125  FHEM/14_SD_WS.pm
+UPD 2021-08-29_20:30:08 100249 FHEM/14_SD_WS.pm
 UPD 2020-04-13_23:15:56 18426  FHEM/14_SD_WS07.pm
 UPD 2021-08-11_21:38:30 35313  FHEM/14_SD_WS09.pm
 UPD 2020-04-13_23:15:56 14325  FHEM/14_SD_WS_Maverick.pm
 UPD 2021-08-11_21:38:30 37904  FHEM/41_OREGON.pm
 UPD 2020-12-17_23:16:30 15582  FHEM/90_SIGNALduino_un.pm
-UPD 2021-08-18_20:38:01 217734 FHEM/lib/SD_ProtocolData.pm
-UPD 2021-06-02_05:49:05 71700  FHEM/lib/SD_Protocols.pm
+UPD 2021-08-29_20:30:08 218835 FHEM/lib/SD_ProtocolData.pm
+UPD 2021-08-29_23:52:52 72899  FHEM/lib/SD_Protocols.pm