################################################################
#
#  Copyright notice
#
#  (c) 2010 Sacha Gloor (sacha@imp.ch)
#
#  This script 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.
#
#  The GNU General Public License can be found at
#  http://www.gnu.org/copyleft/gpl.html.
#  A copy is found in the textfile GPL.txt and important notices to the license
#  from the author is found in LICENSE.txt distributed with these scripts.
#
#  This script 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.
#
#  This copyright notice MUST APPEAR in all copies of the script!
#
################################################################
# $Id$

package main;

use strict;
use warnings;
use Data::Dumper;
use Net::Telnet;

sub Log($$);
#####################################

sub
VantagePro2_Initialize($)
{
  my ($hash) = @_;
  # Consumer
  $hash->{DefFn}   = "VantagePro2_Define";
  $hash->{AttrList}= "model:VantagePro2 delay loglevel:0,1,2,3,4,5,6";
}

#####################################

sub
VantagePro2_Define($$)
{
  my ($hash, $def) = @_;
  my $name=$hash->{NAME};
  my @a = split("[ \t][ \t]*", $def);
  Log 5, "VantagePro2 Define: $a[0] $a[1] $a[2] $a[3]";
  return "Define the host as a parameter i.e. VantagePro2"  if(@a < 3);

  my $host = $a[2];
  my $port=$a[3];
  my $delay=$a[4];
  $attr{$name}{delay}=$delay if $delay;
  Log 1, "VantagePro2 device is none, commands will be echoed only" if($host eq "none");
  
  $hash->{Host} = $host;
  $hash->{Port} = $port;
  $hash->{STATE} = "Initialized";

  InternalTimer(gettimeofday()+$delay, "VantagePro2_GetStatus", $hash, 0);
  return undef;

}

#####################################

sub
VantagePro2_GetStatus($)
{
  my ($hash) = @_;
  
  my $buf;

  Log 5, "VantagePro2_GetStatus";
  my $name = $hash->{NAME};
  my $host = $hash->{Host};
  my $port = $hash->{Port};
  my $text='';
  my $err_log='';
  my $answer;
  my $sensor;
  
  my $delay=$attr{$name}{delay}||300;
  InternalTimer(gettimeofday()+$delay, "VantagePro2_GetStatus", $hash, 0);

  my $tel=new Net::Telnet(Host => $host, Port => $port,Timeout => 3, Binmode => 1, Telnetmode => 0, Errmode => "return");

  if(!defined($tel))
  {
  	Log 4,"$name: Error connecting to $host:$port";
  }
  else
  {
	  $tel->print("");
	  $answer=$tel->get();
	  $tel->print("TEST");
	  $answer=$tel->get();
	  $tel->print("LOOP 1");
	  sleep(1);
	  $answer=$tel->get();
	  $tel->close();  

#	  print "Debug:".length($answer)."\n";

	  if(length($answer)>=63)
	  {
		  my $offset=1;
		  my $t;
		  my $btrend="";

		  $t=substr($answer,$offset+3,1);
		  my ($bartrend)=unpack("c1",$t);

		  $t=substr($answer,$offset+7,2);
		  my ($barometer)=unpack("s2",$t);

		  $barometer=sprintf("%.02f",$barometer/1000*2.54);

		  $t=substr($answer,$offset+9,2);
		  my ($itemp)=unpack("s2",$t);

		  $t=substr($answer,$offset+11,1);
		  my ($ihum)=unpack("c1",$t);

		  $t=substr($answer,$offset+12,2);
		  my ($otemp)=unpack("s2",$t);

		  $t=substr($answer,$offset+33,1);
		  my ($ohum)=unpack("c1",$t);

		  $t=substr($answer,$offset+14,1);
		  my ($windspeed)=unpack("c1",$t);

		  $t=substr($answer,$offset+15,1);
		  my ($avgwindspeed)=unpack("c1",$t);

		  $t=substr($answer,$offset+16,2);
		  my ($winddir)=unpack("s1",$t);

		  $t=substr($answer,$offset+41,2);
		  my ($rainrate)=unpack("s2",$t);

		  $t=substr($answer,$offset+43,1);
		  my ($uv)=unpack("c1",$t);

		  $t=substr($answer,$offset+44,2);
		  my ($solar)=unpack("s2",$t);

		  $t=substr($answer,$offset+46,2);
		  my ($stormrain)=unpack("s2",$t);
		  $stormrain=sprintf("%.02f",($stormrain/100*25.4));

		  $t=substr($answer,$offset+50,2);
		  my ($drain)=unpack("s2",$t);
		  $drain=sprintf("%.02f",($drain*0.2)); #Es werden Anzahl ticks à 0.2mm übermittelt

		  $t=substr($answer,$offset+52,2);
		  my ($mrain)=unpack("s2",$t);
		  $mrain=sprintf("%.02f",($mrain*0.2)); #Es werden Anzahl ticks à 0.2mm übermittelt

		  $t=substr($answer,$offset+54,2);
		  my ($yrain)=unpack("s2",$t);
		  $yrain=sprintf("%.02f",($yrain*0.2)); # #Es werden Anzahl ticks à 0.2mm übermittelt

		  $t=substr($answer,$offset+56,2);
		  my ($etday)=unpack("s2",$t);
		  $etday=sprintf("%.02f",($etday/1000*25.4));

		  $t=substr($answer,$offset+58,2);
		  my ($etmonth)=unpack("s2",$t);
		  $etmonth=sprintf("%.02f",($etmonth/100*25.4));

		  $t=substr($answer,$offset+60,2);
		  my ($etyear)=unpack("s2",$t);
		  $etyear=sprintf("%.02f",($etyear/100*25.4));

		  $itemp=sprintf("%.02f",(($itemp/10)-32)*5/9);
		  $otemp=sprintf("%.02f",(($otemp/10)-32)*5/9);
		  $rainrate=sprintf("%.02f",$rainrate/5);
		  $windspeed=sprintf("%.02f",$windspeed*1.609);
		  $avgwindspeed=sprintf("%.02f",$avgwindspeed*1.609);
		  $uv=$uv/10;
		  if($bartrend==0) { $btrend="Steady"; }
		  elsif($bartrend==20) { $btrend="Rising Slowly"; }
		  elsif($bartrend==60) { $btrend="Rising Rapidly"; }
		  elsif($bartrend==-20) { $btrend="Falling Slowly"; }
		  elsif($bartrend==-60) { $btrend="Falling Rapidly"; }

		  # WindChill and HeatIndex by Andreas Berweger

		  my $wct; #WindChill temperature
		  my $hit; #HeatIndex temperature

		  if($otemp<10 && $avgwindspeed>5) 
		  {
			$wct=sprintf("%.02f",(13.12+(0.6215*$otemp)-(11.37*$avgwindspeed**0.16)+(0.3965*$otemp*$avgwindspeed**0.16)));
		  }
		  else
		  {
			$wct=$otemp;
		  }

		  if($otemp>25 && $ohum>40)
		  {
			$hit=sprintf("%.02f",(-8.784695 + (1.61139411*$otemp) + (2.338549*$ohum) + (-0.14611605*$otemp*$ohum) + (-1.2308094*10**-2*$otemp**2) + (-1.6424828*10**-2*$ohum**2) + (2.211732*10**-3*$otemp**2*$ohum) + (7.2546*10**-4*$otemp*$ohum**2) + (-3.582*10**-6*$otemp**2*$ohum**2))); 
		  }   
		  else 
		  {
			$hit=$otemp;
		  }

		  $text="T-OUT: ".$otemp." T-WC-OUT: ".$wct." T-HI-OUT: ".$hit." T-IN: ".$itemp." H-OUT: ".$ohum." H-IN: ".$ihum." W: ".$windspeed." W-AV: ".$avgwindspeed." WD: ".$winddir." R: ".$rainrate." S: ".$solar." UV: ".$uv." RD: ".$drain." RM: ".$mrain. " RY: ".$yrain." SR: ".$stormrain." BM: ".$barometer." BT: ".$btrend. " ET-DAY: ".$etday." ET-MONTH: ".$etmonth." ET-YEAR: ".$etyear;
		  my $n=0;

		  Log 4,"$name: $text";
		  if (!$hash->{local}){
		       $sensor="temperature-outside";
		       $hash->{CHANGED}[$n++] = "Temperature Outside: ".$otemp;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $otemp." (Celsius)";;

		       $sensor="temperature-windchill";
		       $hash->{CHANGED}[$n++] = "WCT: ".$wct;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $wct." (Celsius)";;

		       $sensor="temperature-heatindex";
		       $hash->{CHANGED}[$n++] = "HeatT: ".$hit;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $hit." (Celsius)";;

		       $sensor="temperature-inside";
		       $hash->{CHANGED}[$n++] = "Temperature Inside: ".$itemp;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $itemp." (Celsius)";;

			$sensor="humidity outside";
		       $hash->{CHANGED}[$n++] = "Humidity Outside: ".$ohum;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $ohum." (%)";;

			$sensor="humidity inside";
		       $hash->{CHANGED}[$n++] = "Humidity Inside: ".$ihum;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $ihum." (%)";;

			$sensor="windspeed";
		       $hash->{CHANGED}[$n++] = "Wind: ".$windspeed;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $windspeed." (km/h)";;

			$sensor="10 min. average windspeed";
		       $hash->{CHANGED}[$n++] = "10 Min. Wind: ".$avgwindspeed;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $avgwindspeed." (km/h)";;

			$sensor="wind direction";
		       $hash->{CHANGED}[$n++] = "Wind Direction: ".$winddir;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $winddir." (Degrees)";;

			$sensor="solar";
		       $hash->{CHANGED}[$n++] = "Solar: ".$solar;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $solar." (Watt/m^2)";;

			$sensor="UV";
		       $hash->{CHANGED}[$n++] = "UV: ".$uv;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $uv." (UV/Index)";;

			$sensor="rainrate";
		       $hash->{CHANGED}[$n++] = "Rainrate: ".$rainrate;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $rainrate." (mm/h)";;

			$sensor="day rain";
		       $hash->{CHANGED}[$n++] = "Dayrain: ".$drain;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $drain." (mm/day)";;

			$sensor="month rain";
		       $hash->{CHANGED}[$n++] = "Monthrain: ".$mrain;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $mrain." (mm/month)";;

			$sensor="year rain";
		       $hash->{CHANGED}[$n++] = "Yearrain: ".$yrain;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $yrain." (mm/year)";;

			$sensor="storm rain";
			$hash->{CHANGED}[$n++] = "SR: ".$stormrain;
			$hash->{READINGS}{$sensor}{TIME} = TimeNow();
			$hash->{READINGS}{$sensor}{VAL} = $stormrain." (mm/storm)";;

			$sensor="barometer";
		       $hash->{CHANGED}[$n++] = "Barometer: ".$barometer;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $barometer." (Millimeters)";;

			$sensor="barometer trend";
		       $hash->{CHANGED}[$n++] = "Barometer Trend: ".$btrend;
		       $hash->{READINGS}{$sensor}{TIME} = TimeNow();
		       $hash->{READINGS}{$sensor}{VAL} = $btrend;

			$sensor="ET Day";
			$hash->{CHANGED}[$n++] = "ETD: ".$etday;
			$hash->{READINGS}{$sensor}{TIME} = TimeNow();
			$hash->{READINGS}{$sensor}{VAL} = $etday." (mm/day)";;

			$sensor="ET Month";
			$hash->{CHANGED}[$n++] = "ETM: ".$etmonth;
			$hash->{READINGS}{$sensor}{TIME} = TimeNow();
			$hash->{READINGS}{$sensor}{VAL} = $etmonth." (mm/month)";;

			$sensor="ET Year";
			$hash->{CHANGED}[$n++] = "ETY: ".$etyear;
			$hash->{READINGS}{$sensor}{TIME} = TimeNow();
			$hash->{READINGS}{$sensor}{VAL} = $etyear." (mm/year)";;

		       DoTrigger($name, undef) if($init_done);    
		  }
		  $hash->{STATE} = $text;
	}
  }
  return($text);
}


1;


=pod
=begin html

<a name="VantagePro2"></a>
<h3>VantagePro2</h3>
<ul>
  Note: this module needs the Net::Telnet perl module.
  <br><br>
  <a name="VantagePro2define"></a>
  <b>Define</b>
  <ul>
    <code>define &lt;name&gt;  &lt;ip-address&gt; &lt;port&gt; &lt;delay&gt;</code>
    <br><br>
    Defines a Davis VantagePro2 weatherstation attached on transparent ethernet/usb|serial server accessable by telnet.<br><br>

    Examples:
    <ul>
      <code>define AUSSEN.wetterstation VantagePro2 192.168.8.127 4999 60</code><br>
      <code>
    fhem> list AUSSEN.wetterstation<br>
    Internals:<br>
   DEF        192.168.8.127 4999 60<br>
   Host       192.168.8.127<br>
   NAME       AUSSEN.wetterstation<br>
   NR         5<br>
   Port       4999<br>
   STATE      T-OUT: 22.78 T-IN: 26.50 H-OUT: 55 H-IN: 45 W: 1.61 W-AV: 1.61 WS 257 R: 0.00 S: 770 UV: 4.1 RD: 0 RM: 41 RY: 241 BM: 76.27 BT: Steady<br>
   TYPE       VantagePro2<br>
   Readings:<br>
     2010-08-04 10:15:17   10 min. average windspeed 1.61 (km/h)<br>
     2010-08-04 10:15:17   UV              4.1 (UV/Index)<br>
     2010-08-04 10:15:17   barometer       76.27 (Millimeters)<br>
     2010-08-04 10:15:17   barometer trend Steady<br>
     2010-08-04 10:15:17   day rain        0 (mm/day)<br>
     2010-08-04 10:15:17   humidity inside 45 (%)<br>
     2010-08-04 10:15:17   humidity outside 55 (%)<br>
     2010-08-04 10:15:17   month rain      41 (mm/month)<br>
     2010-08-04 10:15:17   rainrate        0.00 (mm/h)<br>
     2010-08-04 10:15:17   solar           770 (Watt/m^2)<br>
     2010-08-04 10:15:17   temperature-inside 26.50 (Celsius)<br>
     2010-08-04 10:15:17   temperature-outside 22.78 (Celsius)<br>
     2010-08-04 10:15:17   wind direction  257 (Degrees)<br>
     2010-08-04 10:15:17   windspeed       1.61 (km/h)<br>
     2010-08-04 10:15:17   year rain       241 (mm/year)<br>
Attributes:<br>
   delay      60<br>
      </code><br>
    </ul>
  </ul>
</ul>

=end html
=cut