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new helper module dewpoint
git-svn-id: https://svn.fhem.de/fhem/trunk@1436 2b470e98-0d58-463d-a4d8-8e2adae1ed80
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wherzig
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fhem/FHEM/98_dewpoint.pm
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370
fhem/FHEM/98_dewpoint.pm
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@ -0,0 +1,370 @@
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##############################################
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#
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# Dewpoint computing
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#
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# based / modified from 98_average.pm (C) by Rudolf Koenig
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#
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# Copyright (C) 2012 Willi Herzig
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# The GNU General Public License may also be found at http://www.gnu.org/licenses/gpl-2.0.html .
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#
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# $Id$
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#
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package main;
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use strict;
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use warnings;
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# Debug this module? YES = 1, NO = 0
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my $dewpoint_debug = 0;
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##########################
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sub
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dewpoint_Initialize($)
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{
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my ($hash) = @_;
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$hash->{DefFn} = "dewpoint_Define";
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$hash->{NotifyFn} = "dewpoint_Notify";
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$hash->{NotifyOrderPrefix} = "10-"; # Want to be called before the rest
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$hash->{AttrList} = "disable:0,1";
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}
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##########################
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sub
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dewpoint_Define($$)
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{
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my ($hash, $def) = @_;
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my @a = split("[ \t][ \t]*", $def);
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return "wrong syntax: define <name> dewpoint (dewpoint|fan|alarm) devicename [options]"
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if(@a < 4);
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my $name = $a[0];
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my $cmd_type = $a[2]; # dewpoint, fan, alarm
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my $devname = $a[3];
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if ($cmd_type eq "dewpoint") {
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# define <name> dewpoint dewpoint devicename-regex [temp_name hum_name new_name]
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if(@a == 7) {
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$hash->{TEMP_NAME} = $a[4];
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$hash->{HUM_NAME} = $a[5];
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$hash->{NEW_NAME} = $a[6];
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} elsif (@a == 4) {
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$hash->{TEMP_NAME} = "temperature";
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$hash->{HUM_NAME} = "humidity";
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$hash->{NEW_NAME} = "dewpoint";
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} else {
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return "wrong syntax: define <name> dewpoint dewpoint devicename-regex [temp_name hum_name new_name]"
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}
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} elsif ($cmd_type eq "fan") {
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# define <name> dewpoint fan devicename-regex devicename-outside min_temp
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if(@a == 6) {
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$hash->{DEVNAME_OUT} = $a[4];
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$hash->{MIN_TEMP} = $a[5];
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} else {
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return "wrong syntax: define <name> dewpoint fan devicename-regex devicename-outside min_temp"
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}
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} elsif ($cmd_type eq "alarm") {
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# define <name> dewpoint alarm devicename-regex devicename-reference diff_temp
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if(@a == 6) {
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$hash->{DEVNAME_REF} = $a[4];
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$hash->{DIFF_TEMP} = $a[5];
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} else {
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return "wrong syntax: define <name> dewpoint alarm devicename-regex devicename-reference diff_temp"
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}
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} else {
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return "wrong syntax: define <name> dewpoint (dewpoint|fan|alarm) devicename-regex [options]"
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}
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$hash->{CMD_TYPE} = $cmd_type;
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eval { "Hallo" =~ m/^$devname$/ };
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return "Bad regecaxp: $@" if($@);
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$hash->{DEV_REGEXP} = $devname;
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$hash->{STATE} = "active";
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return undef;
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}
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##########################
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sub
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dewpoint_Notify($$)
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{
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my ($hash, $dev) = @_;
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my $hashName = $hash->{NAME};
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return "" if(AttrVal($hashName, "disable", undef));
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return "" if(!defined($hash->{DEV_REGEXP}));
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my $devName = $dev->{NAME};
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my $cmd_type = $hash->{CMD_TYPE};
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my $re = $hash->{DEV_REGEXP};
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# dewpoint
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my $temp_name = "temperature";
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my $hum_name = "humidity";
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my $new_name = "dewpoint";
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# fan
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my $devname_out = "";
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my $min_temp = 0;
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# alarm
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my $devname_ref = "";
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my $diff_temp = 0;
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if ($cmd_type eq "dewpoint") {
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if (!defined($hash->{TEMP_NAME}) || !defined($hash->{HUM_NAME}) || !defined($hash->{NEW_NAME})) {
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# should never happen!
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Log 1, "Error dewpoint: TEMP_NAME || HUM_NAME || NEW_NAME undefined";
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return "";
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}
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$temp_name = $hash->{TEMP_NAME};
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$hum_name = $hash->{HUM_NAME};
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$new_name = $hash->{NEW_NAME};
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Log 1, "dewpoint_notify: cmd_type=$cmd_type devname=$devName dewname=$hashName, dev=$devName, dev_regex=$re temp_name=$temp_name hum_name=$hum_name" if ($dewpoint_debug == 1);
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} elsif ($cmd_type eq "fan") {
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if (!defined($hash->{DEVNAME_OUT}) || !defined($hash->{MIN_TEMP})) {
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# should never happen!
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Log 1, "Error dewpoint: DEVNAME_OUT || MIN_TEMP undefined";
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return "";
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}
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$devname_out = $hash->{DEVNAME_OUT};
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$min_temp = $hash->{MIN_TEMP};
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Log 1, "dewpoint_notify: cmd_type=$cmd_type devname=$devName dewname=$hashName, dev=$devName, dev_regex=$re, devname_out=$devname_out, min_temp=$min_temp" if ($dewpoint_debug == 1);
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} elsif ($cmd_type eq "alarm") {
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if (!defined($hash->{DEVNAME_REF}) || !defined($hash->{DIFF_TEMP})) {
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# should never happen!
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Log 1, "Error dewpoint: DEVNAME_REF || DIFF_TEMP undefined";
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return "";
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}
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$devname_ref = $hash->{DEVNAME_REF};
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$diff_temp = $hash->{DIFF_TEMP};
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Log 1, "dewpoint_notify: cmd_type=$cmd_type devname=$devName dewname=$hashName, dev=$devName, dev_regex=$re, devname_ref=$devname_ref, diff_temp=$diff_temp" if ($dewpoint_debug == 1);
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} else {
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# should never happen:
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Log 1, "Error notify_dewpoint: <1> unknown cmd_type ".$cmd_type;
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return "";
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}
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my $max = int(@{$dev->{CHANGED}});
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my $tn;
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my $n = -1;
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my $lastval;
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return "" if($devName !~ m/^$re$/);
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my $temperature = "";
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my $humidity = "";
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for (my $i = 0; $i < $max; $i++) {
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my $s = $dev->{CHANGED}[$i];
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Log 1, "dewpoint_notify: s='$s'" if ($dewpoint_debug == 1);
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################
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# Filtering
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next if(!defined($s));
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my ($evName, $val, $rest) = split(" ", $s, 3); # resets $1
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Log 1, "dewpoint_notify: evName='$evName' val=$val'" if ($dewpoint_debug == 1);
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if (($evName eq "T:") && ($temp_name eq "T")) {
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$n = $i;
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#my ($evName1, $val1, $evName2, $val2, $rest) = split(" ", $s, 5); # resets $1
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#$lastval = $evName1." ".$val1." ".$evName2." ".$val2;
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$lastval = $s;
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if ($s =~ /T: [-+]?([0-9]*\.[0-9]+|[0-9]+)/) {
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$temperature = $1;
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}
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if ($s =~ /H: [-+]?([0-9]*\.[0-9]+|[0-9]+)/) {
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$humidity = $1;
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}
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Log 1, "dewpoint_notify T: H:, temp=$temperature hum=$humidity" if ($dewpoint_debug == 1);
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} elsif ($evName eq $temp_name.":") {
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$temperature = $val;
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Log 1, "dewpoint_notify temperature! temp=$temperature" if ($dewpoint_debug == 1);
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} elsif ($evName eq $hum_name.":") {
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$humidity = $val;
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Log 1, "dewpoint_notify humidity! hum=$humidity" if ($dewpoint_debug == 1);
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}
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}
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if ($n == -1) { $n = $max; }
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if (($temperature eq "") || ($humidity eq "")) { return undef; } # no way to calculate dewpoint!
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# We found temperature and humidity. so we can calculate dewpoint first
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my $dewpoint = sprintf("%.1f", dewpoint_dewpoint($temperature,$humidity));
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Log 1, "dewpoint_notify: dewpoint=$dewpoint" if ($dewpoint_debug == 1);
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if ($cmd_type eq "dewpoint") {
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# >define <name> dewpoint dewpoint <devicename> [<temp_name> <hum_name> <new_name>]
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#
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# Calculates dewpoint for device <devicename> from temperature and humidity and write it
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# to new Reading dewpoint.
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# If optional <temp_name>, <hum_name> and <newname> is specified
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# then read temperature from reading <temp_name>, humidity from reading <hum_name>
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# and write dewpoint to reading <temp_name>.
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# if temp_name eq "T" then use temperature from state T: H:, add <newname> to the state
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# Example:
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# define dewtest1 dewpoint dewpoint .*
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# define dewtest2 dewpoint dewpoint .* T H D
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my $sensor = $new_name;
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my $current;
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if ($temp_name ne "T") {
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$current = $dewpoint;
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$tn = TimeNow();
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$dev->{READINGS}{$sensor}{TIME} = $tn;
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$dev->{READINGS}{$sensor}{VAL} = $current;
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$dev->{CHANGED}[$n++] = $sensor . ": " . $current;
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} else {
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# state begins with "T:". append dewpoint or insert before BAT
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if ($lastval =~ /BAT:/) {
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$current = $lastval;
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$current =~ s/BAT:/$sensor: $dewpoint BAT:/g;
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} else {
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$current = $lastval." ".$sensor.": ".$dewpoint;
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}
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$dev->{STATE} = $current;
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$dev->{CHANGED}[$n++] = $current;
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}
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Log 1, "dewpoint_notify: current=$current" if ($dewpoint_debug == 1);
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} elsif ($cmd_type eq "fan") {
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# >define <name> dewpoint fan devicename devicename-outside min-temp
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#
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# This define may be used to turn an fan on or off if the outside air has less
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# water
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#
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# - Generate reading/event "fan: on" if dewpoint of <devicename-outside> is lower
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# than dewpoint of <devicename> and temperature of <devicename-outside> is >= min-temp
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# and reading "fan" was not already "on".
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# - Generate reading/event "fan: off": else and if reading "fan" was not already "off".
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Log 1, "dewpoint_notify: fan devname_out=$devname_out, min_temp=$min_temp" if ($dewpoint_debug == 1);
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my $sensor;
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my $current;
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if (exists $defs{$devname_out}{READINGS}{temperature}{VAL} && exists $defs{$devname_out}{READINGS}{humidity}{VAL}) {
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my $temperature_out = $defs{$devname_out}{READINGS}{temperature}{VAL};
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my $humidity_out = $defs{$devname_out}{READINGS}{humidity}{VAL};
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my $dewpoint_out = sprintf("%.1f", dewpoint_dewpoint($temperature_out,$humidity_out));;
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Log 1, "dewpoint_notify: fan dewpoint_out=$dewpoint_out" if ($dewpoint_debug == 1);
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if ($dewpoint_out < $dewpoint && $temperature_out >= $min_temp) {
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$current = "on";
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Log 1, "dewpoint_notify: fan ON" if ($dewpoint_debug == 1);
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} else {
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$current = "off";
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Log 1, "dewpoint_notify: fan OFF" if ($dewpoint_debug == 1);
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}
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$sensor = "fan";
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if (!exists $defs{$devName}{READINGS}{$sensor}{VAL} || $defs{$devName}{READINGS}{$sensor}{VAL} ne $current) {
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Log 1, "dewpoint_notify: CHANGE fan $current" if ($dewpoint_debug == 1);
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$tn = TimeNow();
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$dev->{READINGS}{$sensor}{TIME} = $tn;
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$dev->{READINGS}{$sensor}{VAL} = $current;
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$dev->{CHANGED}[$n++] = $sensor . ": " . $current;
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}
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} else {
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Log 1, "dewpoint_notify: fan devname_out=$devname_out no temperature or humidity available for dewpoint calculation" if ($dewpoint_debug == 1);
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}
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} elsif ($cmd_type eq "alarm") {
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# >define <name> dewpoint alarm devicename devicename-reference diff
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#
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# - Generate reading/event "alarm: on" if temperature of <devicename-reference>-<diff> is lower
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# than dewpoint of <devicename> and reading "alarm" was not already "on".
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# - Generate reading/event "alarm: off" if temperature of <devicename-reference>-<diff> is higher
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# than dewpoint of <devicename> and reading "alarm" was not already "off".
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#
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# You have different options to use this define:
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# * Use a temperature sensor in or on the wall (<devicename-reference>) and use a temp/hum sensor
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# to measure the dewpoint of the air. Alarm if the temperature of the wall is lower than the dewpoint of the air.
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# In this case the water of the air will condense on the wall because the wall is cold.
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# Example: define alarmtest dewpoint alarm roomsensor wallsensor 0
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# * If you do not have a temperature sensor in/on the wall, you may also compare the rooms dewpoint to the
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# temperature of the same or another inside sensor. If you think that your walls are normally 5 degrees colder
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# than the inside temperature, set diff to 5.
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# Example: define alarmtest dewpoint alarm roomsensor roomsensor 5
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Log 1, "dewpoint_notify: alarm devname_ref=$devname_ref, diff_temp=$diff_temp" if ($dewpoint_debug == 1);
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my $sensor;
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my $current;
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if (exists $defs{$devname_ref}{READINGS}{temperature}{VAL}) {
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my $temperature_ref = $defs{$devname_ref}{READINGS}{temperature}{VAL};
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Log 1, "dewpoint_notify: alarm temperature_ref=$temperature_ref" if ($dewpoint_debug == 1);
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if ($temperature_ref - $diff_temp < $dewpoint) {
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$current = "on";
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Log 1, "dewpoint_notify: alarm ON" if ($dewpoint_debug == 1);
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} else {
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$current = "off";
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Log 1, "dewpoint_notify: alarm OFF" if ($dewpoint_debug == 1);
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}
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$sensor = "alarm";
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if (!exists $defs{$devName}{READINGS}{$sensor}{VAL} || $defs{$devName}{READINGS}{$sensor}{VAL} ne $current) {
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Log 1, "dewpoint_notify: CHANGE alarm $current" if ($dewpoint_debug == 1);
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$tn = TimeNow();
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$dev->{READINGS}{$sensor}{TIME} = $tn;
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$dev->{READINGS}{$sensor}{VAL} = $current;
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$dev->{CHANGED}[$n++] = $sensor . ": " . $current;
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}
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} else {
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Log 1, "dewpoint_notify: alarm devname_out=$devname_out no temperature or humidity available for dewpoint calculation" if ($dewpoint_debug == 1);
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}
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} else {
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# should never happen:
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Log 1, "Error notify_dewpoint: <2> unknown cmd_type ".$cmd_type;
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return "";
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}
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return undef;
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}
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# -----------------------------
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# Dewpoint calculation.
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# see http://www.faqs.org/faqs/meteorology/temp-dewpoint/ "5. EXAMPLE"
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sub
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dewpoint_dewpoint($$)
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{
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my ($temperature, $humidity) = @_;
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my $dp;
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my $A = 17.2694;
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my $B = ($temperature > 0) ? 237.3 : 265.5;
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my $es = 610.78 * exp( $A * $temperature / ($temperature + $B) );
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my $e = $humidity/ 100 * $es;
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if ($e == 0) {
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Log 1, "Error: dewpoint() e==0: temp=$temperature, hum=$humidity";
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return 0;
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}
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my $e1 = $e / 610.78;
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my $f = log( $e1 ) / $A;
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my $f1 = 1 - $f;
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if ($f1 == 0) {
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Log 1, "Error: dewpoint() (1-f)==0: temp=$temperature, hum=$humidity";
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return 0;
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}
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$dp = $B * $f / $f1 ;
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return($dp);
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}
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1;
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@ -156,6 +156,7 @@
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<a href="#at">at</a>
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<a href="#autocreate">autocreate</a>
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<a href="#average">average</a>
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<a href="#dewpoint">dewpoint</a>
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<a href="#dummy">dummy</a>
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<a href="#dumpdef">dumpdef</a>
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<a href="#holiday">holiday</a>
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@ -8411,6 +8412,130 @@ KlikAanKlikUit, NEXA, CHACON, HomeEasy UK. <br> You need to define an RFXtrx433
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</ul>
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<a name="dewpoint"></a>
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<h3>dewpoint</h3>
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<ul>
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Dewpoint calculations. Offers three different ways to use dewpoint: <br>
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<ul>
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<li><b>dewpoint</b><br>
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Compute additional event dewpoint from a sensor offering temperature and humidity.</li>
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<li><b>fan</b><br>
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Generate a event to turn a fan on if the outside air has less water than the inside.</li>
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<li><b>alarm</b><br>
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Generate a mold alarm if a reference temperature is lower that the current dewpoint.</li>
|
||||
<br>
|
||||
</ul>
|
||||
|
||||
<a name="dewpointdefine"></a>
|
||||
<b>Define</b>
|
||||
<ul>
|
||||
<code>define <name> dewpoint dewpoint <devicename-regex> [<temp_name> <hum_name> <new_name>]</code><br>
|
||||
<br>
|
||||
<ul>
|
||||
Calculates dewpoint for device <devicename-regex> from temperature and humidity
|
||||
and write it to a new reading named dewpoint.
|
||||
If optional <temp_name>, <hum_name> and <new_name> is specified
|
||||
then read temperature from reading <temp_name>, humidity from reading <hum_name>
|
||||
and write the calculated dewpoint to reading <new_name>.<br>
|
||||
If <temp_name> is T then use temperature from state T: H:, add <new_name> to the state.
|
||||
</ul>
|
||||
<br>
|
||||
|
||||
Example:<PRE>
|
||||
# Compute the dewpoint for the temperature/humidity
|
||||
# events of the temp1 device and generate reading dewpoint.
|
||||
define dew_temp1 dewpoint dewpoint temp1
|
||||
define dew_temp1 dewpoint dewpoint temp1 temperature humidity dewpoint
|
||||
|
||||
# Compute the dewpoint for the temperature/humidity
|
||||
# events of all devices offering temperature and humidity
|
||||
# and generate reading dewpoint.
|
||||
define dew_all dewpoint dewpoint .*
|
||||
define dew_all dewpoint dewpoint .* temperature humidity dewpoint
|
||||
|
||||
# Compute the dewpoint for the temperature/humidity
|
||||
# events of the device Aussen_1 offering temperature and humidity
|
||||
# and insert is into STATE.
|
||||
define dew_state dewpoint dewpoint Aussen_1 T H D
|
||||
|
||||
# Compute the dewpoint for the temperature/humidity
|
||||
# events of all devices offering temperature and humidity
|
||||
# and insert the result into the STATE.
|
||||
# Example STATE: "T: 10 H: 62.5" will change to
|
||||
# "T: 10 H: 62.5 D: 3.2"
|
||||
define dew_state dewpoint dewpoint .* T H D
|
||||
|
||||
</PRE>
|
||||
</ul>
|
||||
|
||||
<ul>
|
||||
<code>define <name> dewpoint fan <devicename-regex> <devicename-outside> <min-temp></code><br>
|
||||
<br>
|
||||
<ul>
|
||||
May be used to turn an fan on or off if the outside air has less water.
|
||||
<ul>
|
||||
<li>
|
||||
Generate event "fan: on" if dewpoint of <devicename-outside> is lower
|
||||
than dewpoint of <devicename> and temperature of <devicename-outside> is >= min-temp
|
||||
and reading "fan" was not already "on".</li>
|
||||
<li>Generate event "fan: off": else and if reading "fan" was not already "off".</li>
|
||||
</ul>
|
||||
</ul>
|
||||
<br>
|
||||
|
||||
Example:<PRE>
|
||||
# Generate event "fan: on" when dewpoint of Aussen_1 is first
|
||||
# time lower than Keller_Raum1 and outside temperature is >= 0
|
||||
# and change it to "fan: off" is this condition changes.
|
||||
define dew_fan1 dewpoint fan Keller_Raum1 Aussen_1 0
|
||||
|
||||
</PRE>
|
||||
</ul>
|
||||
|
||||
<ul>
|
||||
<code>define <name> dewpoint alarm <devicename-regex> <devicename-reference> <diff-temp></code><br>
|
||||
<br>
|
||||
<ul>
|
||||
Generate a mold alarm if a reference temperature is lower that the current dewpoint.
|
||||
<ul>
|
||||
<li>
|
||||
Generate reading/event "alarm: on" if temperature of <devicename-reference> - <diff-temp> is lower
|
||||
than dewpoint of <devicename> and reading "alarm" was not already "on".</li>
|
||||
<li>Generate reading/event "alarm: off" if temperature of <devicename-reference> - <diff-temp> is higher than dewpoint of <devicename> and reading "alarm" was not already "off".</li>
|
||||
</ul>
|
||||
</ul>
|
||||
<br>
|
||||
|
||||
Example:<PRE>
|
||||
# Using a wall temperature sensor (wallsensor) and a temp/hum sensor
|
||||
# (roomsensor) to alarm if the temperature of the wall is lower than
|
||||
# the dewpoint of the air. In this case the water of the air will
|
||||
# condense on the wall because the wall is cold.
|
||||
define dew_alarm1 dewpoint alarm roomsensor wallsensor 0
|
||||
|
||||
# If you do not have a temperature sensor in/on the wall, you may also
|
||||
# compare the rooms dewpoint to the temperature of the same or another
|
||||
# inside sensor. Alarm is temperature is 5 degrees colder than the
|
||||
# inside dewpointinside.
|
||||
define dev_alarm2 dewpoint alarm roomsensor roomsensor 5
|
||||
|
||||
</PRE>
|
||||
</ul>
|
||||
|
||||
<a name="dewpointset"></a>
|
||||
<b>Set</b> <ul>N/A</ul><br>
|
||||
|
||||
<a name="dewpointget"></a>
|
||||
<b>Get</b> <ul>N/A</ul><br>
|
||||
|
||||
<a name="dewpointattr"></a>
|
||||
<b>Attributes</b>
|
||||
<ul>
|
||||
<li><a href="#disable">disable</a></li>
|
||||
</ul>
|
||||
</ul>
|
||||
|
||||
|
||||
<a name="holiday"></a>
|
||||
<h3>holiday</h3>
|
||||
<ul>
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user