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631 lines
19 KiB
Perl
631 lines
19 KiB
Perl
# $Id$
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##############################################################################
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#
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# 51_I2C_BH1750.pm
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#
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# This file is part of FHEM.
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#
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# Fhem is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 2 of the License, or
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# (at your option) any later version.
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#
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# BDKM 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 FHEM. If not, see <http://www.gnu.org/licenses/>.
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#
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# Written by Arno Augustin
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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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use Time::HiRes qw(tv_interval);
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# BH1750 chip constants
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use constant
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{
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# I2C addresses
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BH1750_ADDR_DEFAULT => 0x23,
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BH1750_ADDR_OTHER => 0x5C,
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# I2C registers
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BH1750_RAW_VALUE => 0x00,
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BH1750_POWER_DOWN => 0x00,
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BH1750_POWER_ON => 0x01,
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BH1750_RESET => 0x07,
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BH1750_H_MODE => 0x10,
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BH1750_H_MODE2 => 0x11,
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BH1750_L_MODE => 0x13,
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BH1750_H_MODE_ONCE => 0x20,
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BH1750_H_MODE2_ONCE => 0x21,
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BH1750_L_MODE_ONCE => 0x23,
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BH1750_MT_MIN => 31,
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BH1750_MT_DEFAULT => 69,
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BH1750_MT_MAX => 254,
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};
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#state
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use constant
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{
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BH1750_STATE_DEFINED => 'Defined',
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BH1750_STATE_I2C_ERROR => 'I2C Error',
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BH1750_STATE_SATURATED => 'Saturated',
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BH1750_STATE_OK => 'Ok'
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};
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# PollState
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use constant
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{
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BH1750_POLLSTATE_IDLE => 0,
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BH1750_POLLSTATE_START_MEASURE => 1,
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BH1750_POLLSTATE_PRE_LUX_WAIT => 2,
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BH1750_POLLSTATE_PRE_LUX_DONE => 3,
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BH1750_POLLSTATE_LUX_WAIT => 4,
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BH1750_POLLSTATE_LUX_DONE => 5
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};
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# chip parameter selection for different LUX values
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# BH1750 has the following limitations:
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# MODE_L, MT= 31, LUX 0-121556, res. >8 LUX
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# MODE_L, MT= 69, LUX 0- 54612, res. >4 LUX
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# MODE2_H, MT= 31, LUX 0- 60778, res. >1 LUX
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# MODE2_H, MT= 69, LUX 0- 27306, res. >0.5 LUX
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# MODE2_H, MT=254, LUX 0- 7417, res. >0.11 LUX
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my @I2C_BH1750_ranges=(
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# RAWVAL MT MODE
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[ 3000, 254, BH1750_H_MODE2_ONCE],
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[ 6000, 127, BH1750_H_MODE2_ONCE],
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[ 12000, 69, BH1750_H_MODE2_ONCE],
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[ 26000, 31, BH1750_H_MODE2_ONCE]
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# else use 31, BH1750_L_MODE_ONCE
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);
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sub I2C_BH1750_Initialize($);
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sub I2C_BH1750_Define($$);
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sub I2C_BH1750_Attr(@);
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sub I2C_BH1750_Poll($);
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sub I2C_BH1750_Restart_Measure($$);
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sub I2C_BH1750_Set($@);
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sub I2C_BH1750_Get($);
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sub I2C_BH1750_Undef($$);
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sub I2C_BH1750_Initialize($)
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{
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my ($hash) = @_;
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$hash->{STATE} = "Init";
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$hash->{DefFn} = "I2C_BH1750_Define";
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$hash->{UndefFn} = "I2C_BH1750_Undef";
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$hash->{InitFn} = "I2C_BH1750_IoInit";
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$hash->{AttrFn} = "I2C_BH1750_Attr";
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$hash->{SetFn} = "I2C_BH1750_Set";
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$hash->{I2CRecFn} = 'I2C_BH1750_I2CRec';
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$hash->{AttrList} = "poll_interval:0.1,0.2,0.5,1,2,5,10,20,30,60 IODev percentdelta correction ".
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$readingFnAttributes;
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$hash->{VERSION} = '$Id$';
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}
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sub I2C_BH1750_Define($$)
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{
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my ($hash, $def) = @_;
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my @a = split(/\s+/, $def);
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my $name = shift(@a);
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my $device=0;
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my $usage=sprintf "usage: \"define <devicename> I2C_BH1750 [devicename] [0x%x|0x%x]\"\n",
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BH1750_ADDR_DEFAULT,BH1750_ADDR_OTHER;
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$hash->{I2C_Address}=BH1750_ADDR_DEFAULT; # default
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Log3 ($hash, 3, $hash->{NAME} . ': ' . "define $def");
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shift(@a);
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@a > 1 and return $usage;
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if(defined ($_=$a[0])) {
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/0x(5c|23)/i or return $usage;
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$hash->{I2C_Address}=hex($_);
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}
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$hash->{BASEINTERVAL} = 0;
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$hash->{RESTARTDELAY} = 10;
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$hash->{DELTA} = 0;
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$hash->{PollState} = BH1750_POLLSTATE_IDLE;
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$hash->{CORRECTION} = 1;
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readingsSingleUpdate($hash, 'state', BH1750_STATE_DEFINED, 1);
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my $ret = undef;
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if ($main::init_done) {
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eval {I2C_BH1750_IoInit($hash, \@a);};
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if($@) {
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$ret = I2C_BH1750_Catch($@);
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Log3 ($hash, 1, $hash->{NAME} . ': ' . $ret);
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}
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}
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return $ret;
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}
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sub I2C_BH1750_IoInit($$)
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{
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my ($hash, $args) = @_;
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my $name = $hash->{NAME};
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eval { AssignIoPort($hash, AttrVal($hash->{NAME},"IODev",undef)); };
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$@ and return I2C_BH1750_Catch($@);
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return undef;
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}
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sub I2C_BH1750_Catch($)
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{
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my $exception = shift;
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if ($exception) {
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$exception =~ /^(.*)( at.*FHEM.*)$/;
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return $1;
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}
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return undef;
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}
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sub I2C_BH1750_Attr (@)
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{
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my ($cmd,$name,$attr,$val) = @_;
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my $hash = $defs{$name};
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my $error = "$name: ERROR attribute $attr ";
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my $del = $cmd =~ /del/;
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local $_;
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Log3 $name, 3, "$name I2C_BH1750_Attr $cmd,$name,$attr,$val";
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if ($attr eq "correction") {
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if($del) {
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$val = 1; # default
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} else {
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$val =~ /^(12|[012]+\.[0-9]+)$/ and $val >= 0.5
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and $val <=2 or return $error."needs numeric value between 0.5 and 2";
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}
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$hash->{CORRECTION} = $val;
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} elsif ($attr eq "percentdelta") {
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if($del) {
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$val = 0; # default
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} else {
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$val =~ /^([0-9]+|[0-9]+\.?[0.9]+)$/ or return $error."needs numeric value";
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}
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$hash->{DELTA} = $val/100;
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} elsif ($attr eq "poll_interval") {
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RemoveInternalTimer($hash);
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if($del) {
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$hash->{BASEINTERVAL} = 0;
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$hash->{PollState} = BH1750_POLLSTATE_IDLE;
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} else {
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if($val !~ /^\d+/) {
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return $error."needs numeric value";
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} else {
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$hash->{BASEINTERVAL} = 60*$val;
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I2C_BH1750_Restart_Measure($hash,$hash->{RESTARTDELAY});
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}
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}
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} elsif ($attr eq "IODev") {
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eval {
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if ($main::init_done and (!defined ($hash->{IODev}) or $hash->{IODev}->{NAME} ne $val)) {
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my @def = split (' ',$hash->{DEF});
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return I2C_BH1750_IoInit($hash,\@def);
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};
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};
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}
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return undef;
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}
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sub I2C_BH1750_Restart_Measure($$)
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{
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my ($hash,$delay) = @_;
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my $name = $hash->{NAME};
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RemoveInternalTimer($hash);
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$hash->{PollState} = BH1750_POLLSTATE_IDLE;
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I2C_BH1750_i2cwrite($hash, BH1750_POWER_DOWN);
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$delay and InternalTimer(gettimeofday() + $delay, 'I2C_BH1750_Poll', $hash, 0);
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}
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sub I2C_BH1750_Poll($)
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{
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my ($hash) = @_;
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my $name = $hash->{NAME};
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Log3 $name, 4, "$name I2C_BH1750_Poll ".gettimeofday()." PollState=$hash->{PollState}";
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RemoveInternalTimer($hash);
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my $delay=$hash->{BASEINTERVAL};
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$hash->{PollState} == BH1750_POLLSTATE_IDLE and $hash->{PollState}++;
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my $state = $hash->{PollState};
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if ($state == BH1750_POLLSTATE_START_MEASURE) {
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I2C_BH1750_i2cwrite($hash, BH1750_POWER_ON);
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# check in lowest resolution first
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$delay = I2C_BH1750_start_measure($hash,BH1750_MT_MIN,BH1750_L_MODE_ONCE);
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$hash->{PollState} = BH1750_POLLSTATE_PRE_LUX_WAIT;
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} elsif($state == BH1750_POLLSTATE_PRE_LUX_WAIT) {
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I2C_BH1750_request_measure($hash);
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} elsif($state == BH1750_POLLSTATE_PRE_LUX_DONE) {
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my $raw=$hash->{RAWVAL};
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if($hash->{RAWVAL} == 0xFFFF) {
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$hash->{SATURATED} = 1;
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} else {
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$hash->{SATURATED} = 0;
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}
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my $i;
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for($i=0; $i<@I2C_BH1750_ranges; $i++) {
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$raw <= $I2C_BH1750_ranges[$i][0] and last;
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}
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if($i == @I2C_BH1750_ranges) {
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# no finer resolution possible, no further poll
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$hash->{PollState} = BH1750_POLLSTATE_LUX_DONE;
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return I2C_BH1750_Poll($hash);
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} else {
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# do finer reading
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my (undef,$mt,$mode)=@{$I2C_BH1750_ranges[$i]};
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Log3 $name, 4, "$name I2C_BH1750_Poll using mt=$mt, mode=$mode";
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$delay=I2C_BH1750_start_measure($hash,$mt,$mode);
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$hash->{PollState} = BH1750_POLLSTATE_LUX_WAIT;
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}
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} elsif($state == BH1750_POLLSTATE_LUX_WAIT) {
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I2C_BH1750_request_measure($hash);
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} elsif($state == BH1750_POLLSTATE_LUX_DONE) {
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if($hash->{SATURATED}) {
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readingsSingleUpdate($hash, 'state', BH1750_STATE_SATURATED, 1);
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Log3 $hash, 4, "$name sensor saturated ";
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} else {
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readingsSingleUpdate($hash, 'state', BH1750_STATE_OK, 1);
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}
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I2C_BH1750_update_lux($hash);
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$hash->{PollState} = BH1750_POLLSTATE_IDLE;
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I2C_BH1750_i2cwrite($hash, BH1750_POWER_DOWN);
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} else {
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Log3 $name, 1, "$name I2C_BH1750_Poll wrong state state=$state";
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$hash->{PollState} = BH1750_POLLSTATE_IDLE;
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}
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$delay and InternalTimer(gettimeofday() + $delay, 'I2C_BH1750_Poll', $hash, 0);
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return undef;
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}
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sub I2C_BH1750_Set($@)
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{
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my ( $hash, @args ) = @_;
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my $name = $hash->{NAME};
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my $cmd = $args[1];
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if($cmd eq "update") {
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RemoveInternalTimer($hash);
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$hash->{PollState} = BH1750_POLLSTATE_START_MEASURE;
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I2C_BH1750_Poll($hash);
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} elsif($cmd eq "deleteminmax") {
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delete($hash->{READINGS}{minimum});
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delete($hash->{READINGS}{maximum});
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} else {
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return "Unknown argument ".$cmd.", choose one of update deleteminmax";
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}
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return undef;
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}
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sub I2C_BH1750_Undef($$)
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{
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my ($hash, $arg) = @_;
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RemoveInternalTimer($hash);
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return undef;
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}
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sub I2C_BH1750_i2cread($$$)
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{
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my ($hash, $reg, $nbyte) = @_;
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my $name = $hash->{NAME};
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Log3 $name, 5, "$name I2C_BH1750_i2cread $reg,$nbyte";
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if (defined (my $iodev = $hash->{IODev})) {
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eval {
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CallFn($iodev->{NAME}, "I2CWrtFn", $iodev,
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{
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direction => "i2cread",
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i2caddress => $hash->{I2C_Address},
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reg => $reg,
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nbyte => $nbyte
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});
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};
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my $sendStat = $hash->{$iodev->{NAME}.'_SENDSTAT'};
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if (defined($sendStat) && $sendStat eq 'error') {
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readingsSingleUpdate($hash, 'state', BH1750_STATE_I2C_ERROR, 1);
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Log3 ($hash, 3, $hash->{NAME} . ": i2cread on $iodev->{NAME} failed");
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return 0;
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}
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} else {
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Log3 ($hash, 1, $hash->{NAME} . ': ' . "no IODev assigned to '$hash->{NAME}'");
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return 0;
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}
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return 1;
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}
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sub I2C_BH1750_i2cwrite
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{
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my ($hash, $reg, @data) = @_;
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my $name = $hash->{NAME};
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Log3 $name, 5, "$name I2C_BH1750_i2write $reg,@data";
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if (defined (my $iodev = $hash->{IODev})) {
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eval {
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CallFn($iodev->{NAME}, "I2CWrtFn", $iodev, {
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direction => "i2cwrite",
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i2caddress => $hash->{I2C_Address},
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reg => $reg,
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data => join (' ',@data),
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});
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};
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my $sendStat = $hash->{$iodev->{NAME}.'_SENDSTAT'};
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if (defined($sendStat) && $sendStat eq 'error') {
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readingsSingleUpdate($hash, 'state', BH1750_STATE_I2C_ERROR, 1);
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Log3 ($hash, 3, $hash->{NAME} . ": i2cwrite on $iodev->{NAME} failed");
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return 0;
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}
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} else {
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Log3 ($hash, 1, $hash->{NAME} . ': ' . "no IODev assigned to '$hash->{NAME}'");
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return 0;
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}
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return 1;
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}
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sub I2C_BH1750_I2CRec ($$)
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{
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my ($hash, $clientmsg) = @_;
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my $name = $hash->{NAME};
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Log3 $name, 5, "$name I2C_BH1750_i2Rec";
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my $pname = undef;
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my $phash = $hash->{IODev};
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$pname = $phash->{NAME};
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while (my ( $k, $v ) = each %$clientmsg) {
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$hash->{$k} = $v if $k =~ /^$pname/;
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Log3 $name, 5, "$name I2C_BH1750_i2Rec $k $v";
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}
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if($clientmsg->{$pname . "_SENDSTAT"} ne "Ok") {
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Log3 $name, 3, "$name I2C_BH1750_i2Rec bad sendstat: ".$clientmsg->{$pname."_SENDSTAT"};
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if($clientmsg->{direction} eq "i2cread" or $clientmsg->{reg}) {
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# avoid recoursion on power down, power down has $clientmsg->{reg} == 0
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I2C_BH1750_Restart_Measure($hash,$hash->{RESTARTDELAY});
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}
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return undef;
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}
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if ( $clientmsg->{direction} eq "i2cread" && defined($clientmsg->{received})) {
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my $register = $clientmsg->{reg};
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Log3 $hash, 4, "$name RX register $register, $clientmsg->{nbyte} byte: $clientmsg->{received}";
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my @raw = split(" ", $clientmsg->{received});
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if ($register == BH1750_RAW_VALUE && $clientmsg->{nbyte} == 2) {
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my $word = $raw[0] << 8 | $raw[1];
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$hash->{RAWVAL}=$word;
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Log3 $name, 4, "$name I2C_BH1750_I2CRec: rawval=$word";
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if($hash->{PollState} == BH1750_POLLSTATE_PRE_LUX_WAIT ||
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$hash->{PollState} == BH1750_POLLSTATE_LUX_WAIT) {
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$hash->{PollState}++;
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I2C_BH1750_Poll($hash);
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}
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}
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}
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return undef;
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}
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sub I2C_BH1750_update_lux
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{
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my($hash)=@_;
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my $name=$hash->{NAME};
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my $lux;
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my $delta=$hash->{DELTA};
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# lux calculation see manual manual:
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$lux = $hash->{RAWVAL}/1.2*(69/$hash->{MT_VAL})/$hash->{MODE};
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$lux *= $hash->{CORRECTION};
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if($delta) { # update only if delta large enough
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my $lastlux=ReadingsNum($name,"luminosity",1000000);
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$lux == $lastlux and return; # no delta, no update
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# check if we have too less delta and return
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if($lastlux > $lux) {
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($lastlux-$lastlux*$delta < $lux) and return;
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} else {
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($lastlux+$lastlux*$delta > $lux) and return;
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}
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}
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# round value
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if($lux < 100) {
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$lux = int($lux*10+0.5)/10;
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} elsif($lux < 1000) {
|
|
$lux=int($lux+0.5);
|
|
} elsif($lux < 10000) {
|
|
$lux=int($lux/10+0.5); $lux *= 10;
|
|
} elsif($lux < 100000) {
|
|
$lux=int($lux/100+0.5); $lux *= 100;
|
|
} else {
|
|
$lux=int($lux/1000+0.5); $lux *= 1000;
|
|
}
|
|
Log3 $name, 4, "$name I2C_BH1750_update_lux: luminosity=$lux";
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|
readingsBeginUpdate($hash);
|
|
readingsBulkUpdate($hash, "luminosity", $lux);
|
|
$lux < ReadingsNum($name,"minimum", 1000000) and readingsBulkUpdate($hash, "minimum", $lux);
|
|
$lux > ReadingsNum($name,"maximum",-1000000) and readingsBulkUpdate($hash, "maximum", $lux);
|
|
readingsEndUpdate($hash, 1);
|
|
}
|
|
|
|
sub I2C_BH1750_request_measure
|
|
{
|
|
my ($hash) = @_;
|
|
I2C_BH1750_i2cread($hash,BH1750_RAW_VALUE,2);
|
|
}
|
|
|
|
|
|
sub I2C_BH1750_start_measure
|
|
{
|
|
my ($hash,$mt,$mode)=@_;
|
|
my $name = $hash->{NAME};
|
|
$hash->{MT_VAL} = $mt;
|
|
$hash->{MODE} = ($mode == BH1750_H_MODE2 || $mode == BH1750_H_MODE2_ONCE) ? 2 : 1;
|
|
my $hi=($mt>>5) | 0x40;
|
|
my $lo=($mt&0x1F) | 0x60;
|
|
I2C_BH1750_i2cwrite($hash,BH1750_RESET);
|
|
I2C_BH1750_i2cwrite($hash,$hi); # set MT value
|
|
I2C_BH1750_i2cwrite($hash,$lo);
|
|
I2C_BH1750_i2cwrite($hash,$mode);
|
|
my $mindelay = ($mode == BH1750_L_MODE || $mode == BH1750_L_MODE_ONCE) ? 24 : 180;
|
|
$mindelay = $mindelay * ($mt/BH1750_MT_DEFAULT);
|
|
Log3 $name, 5, "$name I2C_BH1750_start_measure: duration ".int($mindelay)."ms";
|
|
$mindelay /=1000; # seconds
|
|
|
|
return $mindelay;
|
|
}
|
|
|
|
sub I2C_BH1750_sleep
|
|
{
|
|
select(undef, undef, undef, $_[0]);
|
|
}
|
|
|
|
1;
|
|
|
|
=pod
|
|
=item device
|
|
=item summary support for the BH1750 I2C light sensor
|
|
=item summary_DE Unterstützung für den BH1750 I2C Lichtsensor
|
|
=begin html
|
|
|
|
<a name="I2C_BH1750"></a>
|
|
<h3>I2C_BH1750</h3>
|
|
<ul>
|
|
<a name="I2C_BH1750"></a>
|
|
<p>
|
|
Module for the I<sup>2</sup>C BH1750 light sensor.
|
|
|
|
The BH1750 sensor supports a luminous flux from 0 up to 120k lx
|
|
and a resolution up to 0.11lx.
|
|
It supports different modes to be able to cover this large range of
|
|
data. <br>
|
|
The I2C_BH1750 module tries always to get
|
|
the luminosity data from the sensor as good as possible. To achieve
|
|
this the module first reads flux data in the least sensitive mode and then
|
|
decides which mode to take to get best results.
|
|
|
|
<br><br>
|
|
|
|
For the I<sup>2</sup>C bus the same things are valid as described in the
|
|
<a href="#I2C_TSL2561">I2C_TSL2561</a>
|
|
module.<br>
|
|
|
|
<b>Define</b>
|
|
<ul>
|
|
<code>define BH1750 I2C_BH1750 [I2C address]</code><br><br>
|
|
I2C address must be 0x23 or 0x5C (if omitted default address 0x23 is used)
|
|
<br>
|
|
Examples:
|
|
<pre>
|
|
# define IO-Module:
|
|
define I2C_2 RPII2C 2
|
|
# Use IODev I2C_2 with default i2c address 0x23
|
|
# set poll interval to 1 min
|
|
# generate luminosity value only if difference to last value is at least 10%
|
|
define BH1750 I2C_BH1750
|
|
attr BH1750 IODev I2C_2
|
|
attr BH1750 poll_interval 1
|
|
attr BH1750 percentdelta 10
|
|
</pre>
|
|
</ul>
|
|
|
|
<b>Set</b>
|
|
<ul>
|
|
<li><code>set <device name> update</code><br>
|
|
Force immediate illumination measurement and restart a
|
|
new poll_interval.
|
|
Note that the new readings are not yet available after set returns
|
|
because the
|
|
measurement is performed asynchronously. Depending on the flux value
|
|
this may require more than one second to complete.<br>
|
|
</li>
|
|
<li><code>set <device name> deleteminmax</code><br>
|
|
Delete the minimum maximum readings to start new
|
|
min/max measurement
|
|
</li>
|
|
</ul>
|
|
<p>
|
|
|
|
<b>Readings</b>
|
|
<ul>
|
|
<li>luminosity<br>
|
|
Illumination measurement in the range of 0 to 121557 lx.<br>
|
|
The generated luminosity value is stored with up to one
|
|
fractional digit for values below 100 and
|
|
rounded to 3 significant digits for all other values.
|
|
Compared with the accuracy of the sensor it makes no
|
|
sense to store the values with more precision.
|
|
</li>
|
|
<li>minimum<br>
|
|
minimum of measured luminosity
|
|
</li>
|
|
<li>maximum<br>
|
|
maximum of measured luminosity
|
|
</li>
|
|
<li>state<br>
|
|
Default: Defined, Ok, Saturated, I2C Error
|
|
</li>
|
|
</ul>
|
|
<p>
|
|
|
|
<a name="I2C_BH1750attr"></a>
|
|
<b>Attributes</b>
|
|
<ul>
|
|
<li>IODev<br>
|
|
Set the name of an IODev module like RPII2C<br>
|
|
Default: undefined<br>
|
|
</li>
|
|
<li>poll_interval<br>
|
|
Set the polling interval in minutes to query the sensor for new measured values.
|
|
By changing this attribute a new illumination measurement will be triggered.<br>
|
|
valid values: 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 30, 60<br>
|
|
</li>
|
|
<li>percentdelta<br>
|
|
If set a luminosity reading is only generated if
|
|
the difference between the current luminosity value and the last reading is
|
|
at least percentdelta percents.<br>
|
|
</li>
|
|
<li>correction<br>
|
|
Linear correction factor to be applied to the sensor value.
|
|
Compared with a commercial light meter it seems that the values for my
|
|
BH1750 are about 25% to low in day light (correction 1.25).
|
|
The TLS2561 compares much better with the light meter but has the disadvantage
|
|
that it saturates at about 40k lux.<br>
|
|
The correction factor can also be used if your sensor is behind an opal glass.<br>
|
|
valid range: 0.5 to 2.0<br>
|
|
</li>
|
|
</ul>
|
|
<p>
|
|
<br>
|
|
</ul>
|
|
=end html
|
|
|
|
=cut
|