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fhem-mirror/fhem/FHEM/21_OWMULTI.pm
ntruchsess c3077e3093 OWX: fixes to handle dis- and reconnect 
git-svn-id: https://svn.fhem.de/fhem/trunk@4199 2b470e98-0d58-463d-a4d8-8e2adae1ed80
2013-11-10 19:59:29 +00:00

1058 lines
34 KiB
Perl
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########################################################################################
#
# OWMULTI.pm
#
# FHEM module to commmunicate with 1-Wire chip DS2438Z - Smart Battery Monitor
#
# Prof. Dr. Peter A. Henning
#
# $Id$
#
########################################################################################
#
# define <name> OWMULTI [<model>] <ROM_ID> [interval] or OWMULTI <FAM_ID>.<ROM_ID> [interval]
#
# where <name> may be replaced by any name string
#
# <model> is a 1-Wire device type. If omitted, we assume this to be an
# DS2438
# <FAM_ID> is a 1-Wire family id, currently allowed value is 26
# <ROM_ID> is a 12 character (6 byte) 1-Wire ROM ID
# without Family ID, e.g. A2D90D000800
# [interval] is an optional query interval in seconds
#
# get <name> id => OW_FAMILY.ROM_ID.CRC
# get <name> present => 1 if device present, 0 if not
# get <name> interval => query interval
# get <name> reading => measurement value obtained from VFunction
# get <name> temperature => temperature measurement
# get <name> VDD => supply voltage measurement
# get <name> V|raw => raw external voltage measurement
# get <name> version => OWX version number
#
# set <name> interval => set period for measurement
#
# Additional attributes are defined in fhem.cfg
# Note: attributes "tempXXXX" are read during every update operation.
#
# attr <name> tempOffset <float> = temperature offset in degree Celsius added to the raw temperature reading
# attr <name> tempUnit <string> = unit of measurement, e.g. Celsius/Kelvin/Fahrenheit or C/K/F, default is Celsius
# attr <name> VName <string>|<string> = name for the channel | a type description for the measured value
# attr <name> VUnit <string>|<string> = unit of measurement for the voltage channel | its abbreviation
# attr <name> Vfunction <string> = arbitrary functional expression involving the values VDD, V, T
# VDD is replaced by the measured supply voltage in Volt,
# V by the measured external voltage
# T by the measured and corrected temperature in its unit
#
########################################################################################
#
# This programm 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.
#
########################################################################################
package main;
use vars qw{%attr %defs %modules $readingFnAttributes $init_done};
use strict;
use warnings;
sub Log($$);
my $owx_version="3.24";
#-- temperature and voltage globals - always the raw values from the device
my $owg_temp;
my $owg_volt;
my $owg_vdd;
my $owg_channel;
my %gets = (
"id" => "",
"present" => "",
"interval" => "",
"reading" => "",
"temperature" => "",
"VDD" => "",
"VAD" => "",
"raw" => "",
"version" => ""
);
my %sets = (
"interval" => "",
);
my %updates = (
"present" => "",
"reading" => "",
);
########################################################################################
#
# The following subroutines are independent of the bus interface
#
# Prefix = OWMULTI
#
########################################################################################
#
# OWMULTI_Initialize
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWMULTI_Initialize ($) {
my ($hash) = @_;
$hash->{DefFn} = "OWMULTI_Define";
$hash->{UndefFn} = "OWMULTI_Undef";
$hash->{GetFn} = "OWMULTI_Get";
$hash->{SetFn} = "OWMULTI_Set";
$hash->{AttrFn} = "OWMULTI_Attr";
#tempOffset = a temperature offset added to the temperature reading for correction
#tempUnit = a unit of measure: C/F/K
$hash->{AttrList}= "IODev do_not_notify:0,1 showtime:0,1 model:DS2438 loglevel:0,1,2,3,4,5 ".
"tempOffset tempUnit:C,Celsius,F,Fahrenheit,K,Kelvin ".
"VName VUnit VFunction ".
"interval ".
$readingFnAttributes;
#make sure OWX is loaded so OWX_CRC is available if running with OWServer
main::LoadModule("OWX");
}
#######################################################################################
#
# OWMULTI_Attr - Set one attribute value for device
#
# Parameter hash = hash of device addressed
# a = argument array
#
########################################################################################
sub OWMULTI_Attr(@) {
my ($do,$name,$key,$value) = @_;
my $hash = $defs{$name};
my $ret;
if ( $do eq "set") {
ARGUMENT_HANDLER: {
$key eq "interval" and do {
# check value
return "OWMULTI: Set with short interval, must be > 1" if(int($value) < 1);
# update timer
$hash->{INTERVAL} = $value;
if ($init_done) {
RemoveInternalTimer($hash);
InternalTimer(gettimeofday()+$hash->{INTERVAL}, "OWMULTI_GetValues", $hash, 1);
}
last;
};
}
}
return $ret;
}
########################################################################################
#
# OWMULTI_Define - Implements DefFn function
#
# Parameter hash = hash of device addressed, def = definition string
#
########################################################################################
sub OWMULTI_Define ($$) {
my ($hash, $def) = @_;
# define <name> OWMULTI [<model>] <id> [interval]
# e.g.: define flow OWMULTI 525715020000 300
my @a = split("[ \t][ \t]*", $def);
my ($name,$model,$fam,$id,$crc,$interval,$ret);
my $tn = TimeNow();
#-- default
$name = $a[0];
$interval = 300;
$ret = "";
#-- check syntax
return "OWMULTI: Wrong syntax, must be define <name> OWMULTI [<model>] <id> [interval]"
if(int(@a) < 2 || int(@a) > 6);
#-- different types of definition allowed
my $a2 = $a[2];
my $a3 = defined($a[3]) ? $a[3] : "";
#-- no model, 12 characters
if( $a2 =~ m/^[0-9|a-f|A-F]{12}$/ ) {
$model = "DS2438";
$fam = "26";
$id = $a[2];
if(int(@a)>=4) { $interval = $a[3]; }
CommandAttr (undef,"$name model DS2438");
#-- no model, 2+12 characters
} elsif( $a2 =~ m/^[0-9|a-f|A-F]{2}\.[0-9|a-f|A-F]{12}$/ ) {
$fam = substr($a[2],0,2);
$id = substr($a[2],3);
if(int(@a)>=4) { $interval = $a[3]; }
if( $fam eq "26" ){
$model = "DS2438";
CommandAttr (undef,"$name model DS2438");
}else{
return "OWMULTI: Wrong 1-Wire device family $fam";
}
#-- model, 12 characters
} elsif( $a3 =~ m/^[0-9|a-f|A-F]{12}$/ ) {
$model = $a[2];
$id = $a[3];
if(int(@a)>=5) { $interval = $a[4]; }
if( $model eq "DS2438" ){
$fam = "26";
CommandAttr (undef,"$name model DS2438");
}else{
return "OWMULTI: Wrong 1-Wire device model $model";
}
} else {
return "OWMULTI: $a[0] ID $a[2] invalid, specify a 12 or 2.12 digit value";
}
#-- determine CRC Code - only if this is a direct interface
$crc = sprintf("%02x",OWX_CRC($fam.".".$id."00"));
#-- define device internals
$hash->{OW_ID} = $id;
$hash->{OW_FAMILY} = $fam;
$hash->{PRESENT} = 0;
$hash->{ROM_ID} = "$fam.$id.$crc";
$hash->{INTERVAL} = $interval;
#-- Couple to I/O device
AssignIoPort($hash);
if( !defined($hash->{IODev}->{NAME}) || !defined($hash->{IODev}) ){
return "OWMULTI: Warning, no 1-Wire I/O device found for $name.";
}
#if( $hash->{IODev}->{PRESENT} != 1 ){
# return "OWMULTI: Warning, 1-Wire I/O device ".$hash->{IODev}->{NAME}." not present for $name.";
#}
$modules{OWMULTI}{defptr}{$id} = $hash;
#--
readingsSingleUpdate($hash,"state","defined",1);
Log 3, "OWMULTI: Device $name defined.";
#-- Start timer for updates
InternalTimer(time()+10, "OWMULTI_GetValues", $hash, 0);
return undef;
}
########################################################################################
#
# OWMULTI_ChannelNames - find the real channel names
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWMULTI_ChannelNames($) {
my ($hash) = @_;
my $name = $hash->{NAME};
my $state = $hash->{READINGS}{"state"}{VAL};
my ($cname,@cnama,$unit,@unarr);
my ($tunit,$toffset,$tfactor,$tabbr,$vfunc);
#-- Set channel name, channel unit for voltage channel
$cname = defined($attr{$name}{"VName"}) ? $attr{$name}{"VName"} : "voltage|voltage";
@cnama = split(/\|/,$cname);
if( int(@cnama)!=2){
Log 1, "OWMULTI: Incomplete channel name specification $cname. Better use $cname|<type of data>"
if( $state eq "defined");
push(@cnama,"unknown");
}
#-- unit
$unit = defined($attr{$name}{"VUnit"}) ? $attr{$name}{"VUnit"} : "Volt|V";
@unarr= split(/\|/,$unit);
if( int(@unarr)!=2 ){
Log 1, "OWMULTI: Incomplete channel unit specification $unit. Better use $unit|<abbreviation>"
if( $state eq "defined");
push(@unarr,"");
}
#-- put into readings
$owg_channel = $cnama[0];
$hash->{READINGS}{$owg_channel}{TYPE} = $cnama[1];
$hash->{READINGS}{$owg_channel}{UNIT} = $unarr[0];
$hash->{READINGS}{$owg_channel}{UNITABBR} = $unarr[1];
#-- temperature scale
$hash->{READINGS}{"temperature"}{UNIT} = defined($attr{$name}{"tempUnit"}) ? $attr{$name}{"tempUnit"} : "Celsius";
$tunit = defined($attr{$name}{"tempUnit"}) ? $attr{$name}{"tempUnit"} : $hash->{READINGS}{"temperature"}{UNIT};
$toffset = defined($attr{$name}{"tempOffset"}) ? $attr{$name}{"tempOffset"} : 0.0 ;
$tfactor = 1.0;
if( $tunit eq "Celsius" ){
$tabbr = "&deg;C";
} elsif ($tunit eq "Kelvin" ){
$tabbr = "K";
$toffset += "273.16"
} elsif ($tunit eq "Fahrenheit" ){
$tabbr = "&deg;F";
$toffset = ($toffset+32)/1.8;
$tfactor = 1.8;
} else {
$tabbr="?";
Log 1, "OWMULTI_FormatValues: unknown unit $tunit";
}
#-- these values are rather complex to obtain, therefore save them in the hash
$hash->{READINGS}{"temperature"}{TYPE} = "temperature";
$hash->{READINGS}{"temperature"}{UNIT} = $tunit;
$hash->{READINGS}{"temperature"}{UNITABBR} = $tabbr;
$hash->{tempf}{offset} = $toffset;
$hash->{tempf}{factor} = $tfactor;
}
########################################################################################
#
# OWMULTI_FormatValues - put together various format strings
#
# Parameter hash = hash of device addressed, fs = format string
#
########################################################################################
sub OWMULTI_FormatValues($) {
my ($hash) = @_;
my $name = $hash->{NAME};
my ($toffset,$tfactor,$tval,$vfunc,$vval);
my $svalue = "";
#-- no change in any value if invalid reading
return if( ($owg_temp eq "") || ($owg_vdd eq "") || ($owg_volt eq "") );
#-- obtain channel names
OWMULTI_ChannelNames($hash);
#-- correct values for proper offset, factor
$toffset = $hash->{tempf}{offset};
$tfactor = $hash->{tempf}{factor};
$tval = ($owg_temp + $toffset)*$tfactor;
#-- attribute VFunction defined ?
$vfunc = defined($attr{$name}{"VFunction"}) ? $attr{$name}{"VFunction"} : "V";
#-- replace by proper values
$vfunc =~ s/VDD/\$owg_vdd/g;
$vfunc =~ s/V/\$owg_volt/g;
$vfunc =~ s/T/\$tval/g;
#-- determine the measured value from the function
$vfunc = "\$owg_vdd = $owg_vdd; \$owg_volt = $owg_volt; \$tval = $tval; ".$vfunc;
#Log 1, "vfunc= ".$vfunc;
$vfunc = eval($vfunc);
if( !$vfunc ){
$vval = "";
} elsif( $vfunc ne "" ){
$vval = int( $vfunc*1000 )/1000;
} else {
}
#-- string buildup for return value, STATE
$svalue .= sprintf( "%s: %5.2f %s (T: %5.2f %s)", $owg_channel, $vval,$hash->{READINGS}{$owg_channel}{UNITABBR},$tval,$hash->{READINGS}{"temperature"}{UNITABBR});
#-- put into READINGS
readingsBeginUpdate($hash);
readingsBulkUpdate($hash,$owg_channel,$vval);
readingsBulkUpdate($hash,"VDD",$owg_vdd);
readingsBulkUpdate($hash,"temperature",$tval);
#-- STATE
readingsBulkUpdate($hash,"state",$svalue);
readingsEndUpdate($hash,1);
return $svalue;
}
########################################################################################
#
# OWMULTI_Get - Implements GetFn function
#
# Parameter hash = hash of device addressed, a = argument array
#
########################################################################################
sub OWMULTI_Get($@) {
my ($hash, @a) = @_;
my $reading = $a[1];
my $name = $hash->{NAME};
my $model = $hash->{OW_MODEL};
my $value = undef;
my $ret = "";
#-- check syntax
return "OWMULTI: Get argument is missing @a"
if(int(@a) != 2);
#-- check argument
return "OWMULTI: Get with unknown argument $a[1], choose one of ".join(" ", sort keys %gets)
if(!defined($gets{$a[1]}));
#-- get id
if($a[1] eq "id") {
$value = $hash->{ROM_ID};
return "$name.id => $value";
}
#-- Get other values according to interface type
my $interface= $hash->{IODev}->{TYPE};
#-- get present
if($a[1] eq "present" ) {
#-- OWX interface
if( $interface eq "OWX" ){
#-- hash of the busmaster
my $master = $hash->{IODev};
$value = OWX_Verify($master,$hash->{ROM_ID});
$hash->{PRESENT} = $value;
return "$name.present => $value";
} else {
return "OWMULTI: Verification not yet implemented for interface $interface";
}
}
#-- get interval
if($reading eq "interval") {
$value = $hash->{INTERVAL};
return "$name.interval => $value";
}
#-- get version
if( $a[1] eq "version") {
return "$name.version => $owx_version";
}
#-- reset presence
$hash->{PRESENT} = 0;
#-- OWX interface
if( $interface eq "OWX" ){
#-- not different from getting all values ..
$ret = OWXMULTI_GetValues($hash);
#-- OWFS interface not yet implemented
}elsif( $interface eq "OWServer" ){
$ret = OWFSMULTI_GetValues($hash);
#-- Unknown interface
}else{
return "OWMULTI: Get with wrong IODev type $interface";
}
#-- process results
if( defined($ret) ){
return "OWMULTI: Could not get values from device $name, reason $ret";
}
$hash->{PRESENT} = 1;
#-- return the special reading
if ($reading eq "reading") {
return "OWMULTI: $name.reading => ".OWMULTI_FormatValues($hash);
}
#-- return the special reading
if ($reading eq "VAD") {
return "OWMULTI: $name.VAD => ".
$hash->{READINGS}{$owg_channel}{VAL};
}
if ($reading eq "temperature") {
return "OWMULTI: $name.temperature => ".
$hash->{READINGS}{"temperature"}{VAL};
}
if ($reading eq "VDD") {
return "OWMULTI: $name.VDD => ".
$hash->{READINGS}{"VDD"}{VAL};
}
if ( $reading eq "raw") {
return "OWMULTI: $name.V => ".
$owg_volt;
}
return undef;
}
#######################################################################################
#
# OWMULTI_GetValues - Updates the readings from device
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWMULTI_GetValues($@) {
my $hash = shift;
my $name = $hash->{NAME};
my $value = "";
my $ret = "";
#-- check if device needs to be initialized
OWMULTI_InitializeDevice($hash)
if( $hash->{READINGS}{"state"}{VAL} eq "defined");
#-- restart timer for updates
RemoveInternalTimer($hash);
InternalTimer(time()+$hash->{INTERVAL}, "OWMULTI_GetValues", $hash, 1);
#-- reset presence
$hash->{PRESENT} = 0;
#-- Get values according to interface type
my $interface= $hash->{IODev}->{TYPE};
if( $interface eq "OWX" ){
#-- max 3 tries
for(my $try=0; $try<3; $try++){
$ret = OWXMULTI_GetValues($hash);
last
if( !defined($ret) );
}
}elsif( $interface eq "OWServer" ){
$ret = OWFSMULTI_GetValues($hash);
}else{
return "OWMULTI: GetValues with wrong IODev type $interface";
}
#-- process results
if( defined($ret) ){
return "OWMULTI: Could not get values from device $name, reason $ret";
}
$hash->{PRESENT} = 1;
$value=OWMULTI_FormatValues($hash);
Log 5, $value;
return undef;
}
########################################################################################
#
# OWMULTI_InitializeDevice - delayed setting of initial readings and channel names
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWMULTI_InitializeDevice($) {
my ($hash) = @_;
my $name = $hash->{NAME};
#-- Initial readings
$owg_temp = "";
$owg_volt = "";
$owg_vdd = "";
#-- Set state to initialized
readingsSingleUpdate($hash,"state","initialized",1);
}
#######################################################################################
#
# OWMULTI_Set - Set one value for device
#
# Parameter hash = hash of device addressed
# a = argument string
#
########################################################################################
sub OWMULTI_Set($@) {
my ($hash, @a) = @_;
#-- for the selector: which values are possible
return join(" ", sort keys %sets) if(@a == 2);
#-- check syntax
return "OWMULTI: Set needs one parameter"
if(int(@a) != 3);
#-- check argument
return "OWMULTI: Set with unknown argument $a[1], choose one of ".join(",", sort keys %sets)
if(!defined($sets{$a[1]}));
#-- define vars
my $key = $a[1];
my $value = $a[2];
my $ret = undef;
my $name = $hash->{NAME};
my $model = $hash->{OW_MODEL};
#-- set new timer interval
if($key eq "interval") {
# check value
return "OWMULTI: Set with short interval, must be > 1"
if(int($value) < 1);
# update timer
$hash->{INTERVAL} = $value;
RemoveInternalTimer($hash);
InternalTimer(gettimeofday()+$hash->{INTERVAL}, "OWMULTI_GetValues", $hash, 1);
return undef;
}
#-- set other values depending on interface type
my $interface = $hash->{IODev}->{TYPE};
my $offset = $hash->{tempf}{offset};
my $factor = $hash->{tempf}{factor};
#-- find upper and lower boundaries for given offset/factor
my $mmin = (-55+$offset)*$factor;
my $mmax = (125+$offset)*$factor;
return sprintf("OWMULTI: Set with wrong value $value for $key, range is [%3.1f,%3.1f]",$mmin,$mmax)
if($value < $mmin || $value > $mmax);
#-- seems to be ok, put into the device
$a[2] = int($value/$factor-$offset);
#-- OWX interface
if( $interface eq "OWX" ){
$ret = OWXMULTI_SetValues($hash,@a);
#-- OWFS interface
}elsif( $interface eq "OWServer" ){
$ret = OWFSMULTI_SetValues($hash,@a);
} else {
return "OWMULTI: Set with wrong IODev type $interface";
}
#-- process results
if( defined($ret) ){
return "OWMULTI: Could not set device $name, reason: ".$ret;
}
#-- process results - we have to reread the device
$hash->{PRESENT} = 1;
OWMULTI_GetValues($hash);
OWMULTI_FormatValues($hash);
Log 4, "OWMULTI: Set $hash->{NAME} $key $value";
return undef;
}
########################################################################################
#
# OWMULTI_Undef - Implements UndefFn function
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWMULTI_Undef ($) {
my ($hash) = @_;
delete($modules{OWMULTI}{defptr}{$hash->{OW_ID}});
RemoveInternalTimer($hash);
return undef;
}
########################################################################################
#
# The following subroutines in alphabetical order are only for a 1-Wire bus connected
# via OWFS
#
# Prefix = OWFSMULTI
#
########################################################################################
#
# OWFSMULTI_GetValues - Get reading from one device
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWFSMULTI_GetValues($) {
my ($hash) = @_;
#-- ID of the device
my $owx_add = substr($hash->{ROM_ID},0,15);
#-- hash of the busmaster
my $master = $hash->{IODev};
my $name = $hash->{NAME};
#-- get values - or should we rather get the uncached ones ?
$owg_temp = OWServer_Read($master,"/$owx_add/temperature");
$owg_vdd = OWServer_Read($master,"/$owx_add/VDD");
$owg_volt = OWServer_Read($master,"/$owx_add/VAD");
return "no return from OWServer"
if( (!defined($owg_temp)) || (!defined($owg_vdd)) || (!defined($owg_volt)) );
return "empty return from OWServer"
if( ($owg_temp eq "") || ($owg_vdd eq "") || ($owg_volt eq "") );
return undef;
}
#######################################################################################
#
# OWFSMULTI_SetValues - Set values in device
#
# Parameter hash = hash of device addressed
# a = argument array
#
########################################################################################
sub OWFSMULTI_SetValues($@) {
my ($hash, @a) = @_;
}
########################################################################################
#
# The following subroutines in alphabetical order are only for a 1-Wire bus connected
# directly to the FHEM server
#
# Prefix = OWXMULTI
#
########################################################################################
#
# OWXMULTI_GetValues - Get reading from one device
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWXMULTI_GetValues($) {
my ($hash) = @_;
my ($i,$j,$k,$res,$res2);
#-- ID of the device
my $owx_dev = $hash->{ROM_ID};
#-- hash of the busmaster
my $master = $hash->{IODev};
#-- switch the device to current measurement off, VDD only
OWX_Reset($master);
#-- issue the match ROM command \x55 and the write scratchpad command
if( OWX_Complex($master,$owx_dev,"\x4E\x00\x08",0) eq 0 ){
return "$owx_dev write status failed";
}
#-- copy scratchpad to register
OWX_Reset($master);
#-- issue the match ROM command \x55 and the copy scratchpad command
if( OWX_Complex($master,$owx_dev,"\x48\x00",0) eq 0){
return "$owx_dev copy scratchpad failed";
}
#-- initiate temperature conversion
OWX_Reset($master);
#-- issue the match ROM command \x55 and the start conversion command
if( OWX_Complex($master,$owx_dev,"\x44",0) eq 0 ){
return "$owx_dev temperature conversion failed";
}
#-- conversion needs some 10 ms !
select(undef,undef,undef,0.012);
#-- initiate voltage conversion
OWX_Reset($master);
#-- issue the match ROM command \x55 and the start conversion command
if( OWX_Complex($master,$owx_dev,"\xB4",0) eq 0 ){
return "$owx_dev voltage conversion failed";
}
#-- conversion needs some 4 ms !
select(undef,undef,undef,0.006);
#-- from memory to scratchpad
OWX_Reset($master);
#-- issue the match ROM command \x55 and the recall memory command
if( OWX_Complex($master,$owx_dev,"\xB8\x00",0) eq 0 ){
return "$owx_dev recall memory failed";
}
#-- copy needs some 10 ms !
select(undef,undef,undef,0.012);
#-- NOW ask the specific device
OWX_Reset($master);
#-- issue the match ROM command \x55 and the read scratchpad command \xBE
#-- reading 9 + 2 + 9 data bytes = 20 bytes
$res=OWX_Complex($master,$owx_dev,"\xBE\x00",9);
#Log 1,"OWXMULTI: data length from reading device is ".length($res)." bytes";
#-- process results
if( $res eq 0 ){
return "$owx_dev not accessible in 2nd step";
}
#-- process results
my @data=split(//,substr($res,9));
return "invalid data length, ".int(@data)." instead of 11 bytes"
if (@data != 11);
return "conversion not complete or data invalid"
if ((ord($data[2]) & 112)!=0);
return "invalid CRC"
if (OWX_CRC8(substr($res,11,8),$data[10])==0);
#-- this must be different for the different device types
# family = 26 => DS2438
#-- temperature
my $lsb = ord($data[3]);
my $msb = ord($data[4]) & 127;
my $sign = ord($data[4]) & 128;
#-- test with -55 degrees
#$lsb = 0;
#$sign = 1;
#$msb = 73;
#-- 2's complement form = signed bytes
$owg_temp = $msb+ $lsb/256;
if( $sign !=0 ){
$owg_temp = -128+$owg_temp;
}
#-- voltage
$lsb = ord($data[5]);
$msb = ord($data[6]) & 3;
#-- test with 5V
#$lsb = 244;
#$msb = 1;
#-- supply voltage
$owg_vdd = ($msb*256+ $lsb)/100;
#-- switch the device to current measurement off, V external only
OWX_Reset($master);
#-- issue the match ROM command \x55 and the write scratchpad command
if( OWX_Complex($master,$owx_dev,"\x4E\x00\x00",0) eq 0 ){
return "$owx_dev write status failed";
}
#-- copy scratchpad to register
OWX_Reset($master);
#-- issue the match ROM command \x55 and the copy scratchpad command
if( OWX_Complex($master,$owx_dev,"\x48\x00",0) eq 0){
return "$owx_dev copy scratchpad failed";
}
#-- initiate voltage conversion
OWX_Reset($master);
#-- issue the match ROM command \x55 and the start conversion command
if( OWX_Complex($master,$owx_dev,"\xB4",0) eq 0 ){
return "$owx_dev voltage conversion failed";
}
#-- conversion needs some 4 ms !
select(undef,undef,undef,0.006);
#-- from memory to scratchpad
OWX_Reset($master);
#-- issue the match ROM command \x55 and the recall memory command
if( OWX_Complex($master,$owx_dev,"\xB8\x00",0) eq 0 ){
return "$owx_dev recall memory failed";
}
#-- copy needs some 10 ms !
select(undef,undef,undef,0.012);
#-- NOW ask the specific device
OWX_Reset($master);
#-- issue the match ROM command \x55 and the read scratchpad command \xBE
#-- reading 9 + 2 + 9 data bytes = 20 bytes
$res=OWX_Complex($master,$owx_dev,"\xBE\x00",9);
#-- process results
if( $res eq 0 ){
return "$owx_dev not accessible in 2nd step";
}
#-- process results
@data=split(//,substr($res,9));
return "invalid data length, ".int(@data)." instead of 11 bytes"
if (@data != 11);
return "conversion not complete or data invalid"
if ((ord($data[2]) & 112)!=0);
return "invalid CRC"
if (OWX_CRC8(substr($res,11,8),$data[10])==0);
#-- this must be different for the different device types
# family = 26 => DS2438
#-- voltage
$lsb = ord($data[5]);
$msb = ord($data[6]) & 3;
#-- test with 7.2 V
#$lsb = 208;
#$msb = 2;
#-- external voltage
$owg_volt = ($msb*256+ $lsb)/100;
return undef;
}
#######################################################################################
#
# OWXMULTI_SetValues - Set values in device
#
# Parameter hash = hash of device addressed
# a = argument array
#
########################################################################################
sub OWXMULTI_SetValues($@) {
my ($hash, @a) = @_;
my ($i,$j,$k);
my $name = $hash->{NAME};
#-- ID of the device
my $owx_dev = $hash->{ROM_ID};
#-- hash of the busmaster
my $master = $hash->{IODev};
#-- define vars
my $key = $a[1];
my $value = $a[2];
OWX_Reset($master);
#-- issue the match ROM command \x55 and the write scratchpad command \x4E,
# followed by the write EEPROM command \x48
#
# so far writing the EEPROM does not work properly.
# 1. \x48 directly appended to the write scratchpad command => command ok, no effect on EEPROM
# 2. \x48 appended to match ROM => command not ok.
# 3. \x48 sent by WriteBytePower after match ROM => command ok, no effect on EEPROM
my $select=sprintf("\x4E%c%c\x48",0,0);
my $res=OWX_Complex($master,$owx_dev,$select,0);
if( $res eq 0 ){
return "OWXMULTI: Device $owx_dev not accessible";
}
return undef;
}
1;
=pod
=begin html
<a name="OWMULTI"></a>
<h3>OWMULTI</h3>
<p>FHEM module to commmunicate with 1-Wire multi-sensors, currently the DS2438 smart battery
monitor<br /> <br />This 1-Wire module works with the OWX interface module or with the OWServer interface module
(prerequisite: Add this module's name to the list of clients in OWServer).
Please define an <a href="#OWX">OWX</a> device or <a href="#OWServer">OWServer</a> device first.</p>
<h4>Example</h4>
<p>
<code>define OWX_M OWMULTI 7C5034010000 45</code>
<br />
<code>attr OWX_M VName relHumidity|humidity</code>
<br />
<code>attr OWX_M VUnit percent|%</code>
<br />
<code>attr OWX_M VFunction (161.29 * V / VDD - 25.8065)/(1.0546 - 0.00216 * T)</code>
</p>
<a name="OWMULTIdefine"></a>
<h4>Define</h4>
<p>
<code>define &lt;name&gt; OWMULTI [&lt;model&gt;] &lt;id&gt; [&lt;interval&gt;]</code> or <br/>
<code>define &lt;name&gt; OWMULTI &lt;fam&gt;.&lt;id&gt; [&lt;interval&gt;]</code>
<br /><br /> Define a 1-Wire multi-sensor</p>
<ul>
<li>
<code>[&lt;model&gt;]</code><br /> Defines the sensor model (and thus 1-Wire family
id), currently the following values are permitted: <ul>
<li>model DS2438 with family id 26 (default if the model parameter is omitted).
Measured is a temperature value, an external voltage and the current supply
voltage</li>
</ul>
</li>
<li>
<code>&lt;fam&gt;</code>
<br />2-character unique family id, see above
</li>
<li>
<code>&lt;id&gt;</code>
<br />12-character unique ROM id of the converter device without family id and CRC
code </li>
<li>
<code>&lt;interval&gt;</code>
<br />Measurement interval in seconds. The default is 300 seconds. </li>
</ul>
<a name="OWMULTIset"></a>
<h4>Set</h4>
<ul>
<li><a name="owmulti_interval">
<code>set &lt;name&gt; interval &lt;int&gt;</code></a><br /> Measurement
interval in seconds. The default is 300 seconds. </li>
</ul>
<a name="OWMULTIget"></a>
<h4>Get</h4>
<ul>
<li><a name="owmulti_id">
<code>get &lt;name&gt; id</code></a>
<br /> Returns the full 1-Wire device id OW_FAMILY.ROM_ID.CRC </li>
<li><a name="owmulti_present">
<code>get &lt;name&gt; present</code>
</a>
<br /> Returns 1 if this 1-Wire device is present, otherwise 0. </li>
<li><a name="owmulti_interval2">
<code>get &lt;name&gt; interval</code></a><br />Returns measurement interval in
seconds. </li>
<li><a name="owmulti_reading">
<code>get &lt;name&gt; reading</code></a><br />Obtain the measurement values </li>
<li><a name="owmulti_vad">
<code>get &lt;name&gt; VAD</code></a><br />Obtain the measurement value from
VFunction. </li>
<li><a name="owmulti_temperature">
<code>get &lt;name&gt; temperature</code></a><br />Obtain the temperature value. </li>
<li><a name="owmulti_vdd">
<code>get &lt;name&gt; VDD</code></a><br />Obtain the current supply voltage. </li>
<li><a name="owmulti_raw">
<code>get &lt;name&gt; V</code> or <code>get &lt;name&gt;
raw</code></a><br />Obtain the raw external voltage measurement. </li>
</ul>
<a name="OWMULTIattr"></a>
<h4>Attributes</h4>
<ul>
<li><a name="owmulti_vname"><code>attr &lt;name&gt; VName
&lt;string&gt;|&lt;string&gt;</code></a>
<br />name for the channel | a type description for the measured value. </li>
<li><a name="owmulti_vunit"><code>attr &lt;name&gt; VUnit
&lt;string&gt;|&lt;string&gt;</code></a>
<br />unit of measurement for this channel | its abbreviation. </li>
<li><a name="owmulti_vfunction"><code>attr &lt;name&gt; VFunction
&lt;string&gt;</code></a>
<br />arbitrary functional expression involving the values VDD, V, T. Example see
above. <ul>
<li>VDD is replaced by the measured supply voltage in Volt,</li>
<li> V by the measured external voltage,</li>
<li>T by the measured and corrected temperature in its unit</li>
</ul></li>
<li><a name="owmulti_tempOffset"><code>attr &lt;name&gt; tempOffset &lt;float&gt;</code>
</a>
<br />temperature offset in &deg;C added to the raw temperature reading. </li>
<li><a name="owmulti_tempUnit"><code>attr &lt;name&gt; tempUnit
Celsius|Kelvin|Fahrenheit|C|K|F</code>
</a>
<br />unit of measurement (temperature scale), default is Celsius = &deg;C </li>
<li>Standard attributes <a href="#alias">alias</a>, <a href="#comment">comment</a>, <a
href="#event-on-update-reading">event-on-update-reading</a>, <a
href="#event-on-change-reading">event-on-change-reading</a>, <a
href="#stateFormat">stateFormat</a>, <a href="#room"
>room</a>, <a href="#eventMap">eventMap</a>, <a href="#loglevel">loglevel</a>,
<a href="#webCmd">webCmd</a></li>
</ul>
=end html
=cut
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