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fhem-mirror/fhem/contrib/1-Wire/21_OWTHERM.pm

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########################################################################################
#
# OWTHERM.pm
#
# FHEM module to commmunicate with 1-Wire temperature sensors DS1820, DS18S20, DS18B20, DS1822
#
# Attention: This module may communicate with the OWX module,
# and also with the 1-Wire File System OWFS
#
# Prefixes for subroutines of this module:
# OW = General 1-Wire routines (Martin Fischer, Peter Henning)
# OWFS = 1-Wire file system (Martin Fischer)
# OWX = 1-Wire bus master interface (Peter Henning)
#
# Prof. Dr. Peter A. Henning, 2012
# Martin Fischer, 2011
#
# Version 2.1 - July, 2012
#
# Setup bus device in fhem.cfg as
#
# define <name> OWTHERM [<model>] <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
# DS1820 temperature sensor
# Currently allowed values are DS1820, DS1822
# <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> temperature => temperature measurement
# get <name> alarm => alarm temperature settings
#
# set <name> interval => set period for measurement
# set <name> tempLow => lower alarm temperature setting
# set <name> tempHigh => higher alarm temperature setting
#
# Additional attributes are defined in fhem.cfg
# Note: attributes "tempXXXX" are read during every update operation.
#
# attr <name> stateAL "<string>" = character string for denoting low alarm condition, default is red down triangle
# attr <name> stateAH "<string>" = character string for denoting high alarm condition, default is red up triangle
# 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> tempLow <float> = value for low alarm
# attr <name> tempHigh <float> = value for high alarm
#
########################################################################################
#
# 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;
#-- Prototypes to make komodo happy
use vars qw{%attr %defs};
use strict;
use warnings;
sub Log($$);
#-- temperature globals - always the raw values from the device
my $owg_temp = 0;
my $owg_th = 0;
my $owg_tl = 0;
#-- variables for display strings
my $stateal;
my $stateah;
my %gets = (
"id" => "",
"present" => "",
"interval" => "",
"temperature" => "",
"alarm" => ""
);
my %sets = (
"interval" => "",
"tempHigh" => "",
"tempLow" => ""
);
my %updates = (
"present" => "",
"temperature" => "",
"alarm" => ""
);
########################################################################################
#
# The following subroutines are independent of the bus interface
#
# Prefix = OWTHERM
#
########################################################################################
#
# OWTHERM_Initialize
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWTHERM_Initialize ($) {
my ($hash) = @_;
$hash->{DefFn} = "OWTHERM_Define";
$hash->{UndefFn} = "OWTHERM_Undef";
$hash->{GetFn} = "OWTHERM_Get";
$hash->{SetFn} = "OWTHERM_Set";
#tempOffset = a temperature offset added to the temperature reading for correction
#tempUnit = a unit of measure: C/F/K
$hash->{AttrList}= "IODev do_not_notify:0,1 showtime:0,1 loglevel:0,1,2,3,4,5 ".
"stateAL stateAH ".
"tempOffset tempUnit:C,Celsius,F,Fahrenheit,K,Kelvin ".
"tempLow tempHigh";
}
########################################################################################
#
# OWTHERM_Define - Implements DefFn function
#
# Parameter hash = hash of device addressed, def = definition string
#
########################################################################################
sub OWTHERM_Define ($$) {
my ($hash, $def) = @_;
# define <name> OWTHERM [<model>] <id> [interval]
# e.g.: define flow OWTHERM 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 "OWTHERM: Wrong syntax, must be define <name> OWTHERM [<model>] <id> [interval]"
if(int(@a) < 2 || int(@a) > 6);
#-- check if this is an old style definition, e.g. <model> is missing
my $a2 = $a[2];
my $a3 = defined($a[3]) ? $a[3] : "";
if( ($a2 eq "none") || ($a3 eq "none") ) {
return "OWTHERM: ID = none is obsolete now, please redefine";
} elsif( $a2 =~ m/^[0-9|a-f|A-F]{12}$/ ) {
$model = "DS1820";
$id = $a[2];
if(int(@a)>=4) { $interval = $a[3]; }
Log 1, "OWTHERM: Parameter [alarminterval] is obsolete now - must be set with I/O-Device"
if(int(@a) == 5);
} elsif( $a3 =~ m/^[0-9|a-f|A-F]{12}$/ ) {
$model = $a[2];
$id = $a[3];
if(int(@a)>=5) { $interval = $a[4]; }
Log 1, "OWTHERM: Parameter [alarminterval] is obsolete now - must be set with I/O-Device"
if(int(@a) == 6);
} else {
return "OWTHERM: $a[0] ID $a[2] invalid, specify a 12 digit value";
}
#-- 1-Wire ROM identifier in the form "FF.XXXXXXXXXXXX.YY"
# FF = family id follows from the model
# YY must be determined from id
if( $model eq "DS1820" ){
$fam = "10";
}elsif( $model eq "DS1822" ){
$fam = "22";
}elsif( $model eq "DS18B20" ){
$fam = "28";
}else{
return "OWTHERM: Wrong 1-Wire device model $model";
}
# determine CRC Code - only if this is a direct interface
$crc = defined($hash->{IODev}->{INTERFACE}) ? sprintf("%02x",OWX_CRC($fam.".".$id."00")) : "00";
#-- define device internals
$hash->{ALARM} = 0;
$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);
Log 3, "OWTHERM: Warning, no 1-Wire I/O device found for $name."
if(!defined($hash->{IODev}->{NAME}));
$modules{OWTHERM}{defptr}{$id} = $hash;
$hash->{STATE} = "Defined";
Log 3, "OWTHERM: Device $name defined.";
#-- Start timer for initialization in a few seconds
InternalTimer(time()+1, "OWTHERM_InitializeDevice", $hash, 0);
#-- Start timer for updates
InternalTimer(time()+$hash->{INTERVAL}, "OWTHERM_GetValues", $hash, 0);
return undef;
}
########################################################################################
#
# OWTHERM_InitializeDevice - delayed setting of initial readings and channel names
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWTHERM_InitializeDevice($) {
my ($hash) = @_;
my $name = $hash->{NAME};
$stateal = defined($attr{$name}{stateAL}) ? $attr{$name}{stateAL} : "<span style=\"color:red\">&#x25BE;</span>";
$stateah = defined($attr{$name}{stateAH}) ? $attr{$name}{stateAH} : "<span style=\"color:red\">&#x25B4;</span>";
#-- unit attribute defined ?
$hash->{READINGS}{"temperature"}{UNIT} = defined($attr{$name}{"tempUnit"}) ? $attr{$name}{"tempUnit"} : "Celsius";
$hash->{READINGS}{"temperature"}{TYPE} = "temperature";
#-- Initial readings temperature sensor
$owg_temp = 0.0;
$owg_tl = -15.0;
$owg_th = 70.0;
#-- Initialize all the display stuff
OWTHERM_FormatValues($hash);
}
########################################################################################
#
# OWTHERM_FormatValues - put together various format strings
#
# Parameter hash = hash of device addressed, fs = format string
#
########################################################################################
sub OWTHERM_FormatValues($) {
my ($hash) = @_;
my $name = $hash->{NAME};
my ($unit,$offset,$factor,$abbr,$vval,$vlow,$vhigh,$statef);
my ($value1,$value2,$value3) = ("","","");
my $tn = TimeNow();
#-- attributes defined ?
$stateal = defined($attr{$name}{stateAL}) ? $attr{$name}{stateAL} : "<span style=\"color:red\">&#x25BE;</span>";
$stateah = defined($attr{$name}{stateAH}) ? $attr{$name}{stateAH} : "<span style=\"color:red\">&#x25B4;</span>";
$unit = defined($attr{$name}{"tempUnit"}) ? $attr{$name}{"tempUnit"} : $hash->{READINGS}{"temperature"}{UNIT};
$offset = defined($attr{$name}{"tempoffset"}) ? $attr{$name}{"tempOffset"} : 0.0 ;
$factor = 1.0;
if( $unit eq "Celsius" ){
$abbr = "&deg;C";
} elsif ($unit eq "Kelvin" ){
$abbr = "K";
$offset += "273.16"
} elsif ($unit eq "Fahrenheit" ){
$abbr = "&deg;F";
$offset = ($offset+32)/1.8;
$factor = 1.8;
} else {
$abbr="?";
Log 1, "OWTHERM_FormatValues: unknown unit $unit";
}
#-- these values are rather coplex to obtain, therefore save them in the hash
$hash->{READINGS}{"temperature"}{UNIT} = $unit;
$hash->{READINGS}{"temperature"}{UNITABBR} = $abbr;
$hash->{tempf}{offset} = $offset;
$hash->{tempf}{factor} = $factor;
#-- correct values for proper offset, factor
$vval = ($owg_temp + $offset)*$factor;
#-- put into READINGS
$hash->{READINGS}{"temperature"}{VAL} = $vval;
$hash->{READINGS}{"temperature"}{TIME} = $tn;
#-- correct alarm values for proper offset, factor
$vlow = ($owg_tl + $offset)*$factor;
$vhigh = ($owg_th + $offset)*$factor;
#-- put into READINGS
$hash->{READINGS}{"tempLow"}{VAL} = $vlow;
$hash->{READINGS}{"tempLow"}{TIME} = $tn;
$hash->{READINGS}{"tempHigh"}{VAL} = $vhigh;
$hash->{READINGS}{"tempHigh"}{TIME} = $tn;
#-- formats for output
$statef = "%5.2f ".$abbr;
$value1 = "temperature: ".sprintf($statef,$vval);
$value2 = sprintf($statef,$vval);
$hash->{ALARM} = 1;
#-- Test for alarm condition
if( ($vval <= $vlow) && ( $vval >= $vhigh ) ){
$value2 .= " ".$stateal.$stateah;
$value3 .= " ".$stateal.$stateah;
}elsif( $vval <= $vlow ){
$value2 .= " ".$stateal;
$value3 .= " ".$stateal;
}elsif( $vval >= $vhigh ){
$value2 .= " ".$stateah;
$value3 .= " ".$stateah;
} else {
$hash->{ALARM} = 0;
}
#-- STATE
$hash->{STATE} = $value2;
#-- alarm
#$hash->{READINGS}{alarms}{VAL} = $value3;
#$hash->{READINGS}{alarms}{TIME} = $tn;
return $value1;
}
########################################################################################
#
# OWTHERM_Get - Implements GetFn function
#
# Parameter hash = hash of device addressed, a = argument array
#
########################################################################################
sub OWTHERM_Get($@) {
my ($hash, @a) = @_;
my $reading = $a[1];
my $name = $hash->{NAME};
my $model = $hash->{OW_MODEL};
my $value = undef;
my $ret = "";
#-- check syntax
return "OWTHERM: Get argument is missing @a"
if(int(@a) != 2);
#-- check argument
return "OWTHERM: 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 = $hash->{ROM_ID};
return "$a[0] $reading => $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} = $value;
return "$a[0] $reading => $value";
} else {
return "OWTHERM: Verification not yet implemented for interface $interface";
}
}
#-- get interval
if($reading eq "interval") {
$value = $hash->{INTERVAL};
return "$a[0] $reading => $value";
}
#-- reset presence
$hash->{PRESENT} = 0;
#-- OWX interface
if( $interface eq "OWX" ){
#-- not different from getting all values ..
$ret = OWXTHERM_GetValues($hash);
#-- OWFS interface
}elsif( $interface eq "OWFS" ){
$ret = OWFSTHERM_GetValues($hash);
#-- Unknown interface
}else{
return "OWTHERM: Get with wrong IODev type $interface";
}
#-- process results
if( defined($ret) ){
return "OWTHERM: Could not get values from device $name, return was $ret";
}
$hash->{PRESENT} = 1;
OWTHERM_FormatValues($hash);
#-- return the special reading
if ($reading eq "temperature") {
return "OWTHERM: $name.temperature => ".
$hash->{READINGS}{"temperature"}{VAL};
} elsif ($reading eq "alarm") {
return "OWTHERM: $name.alarm => L ".$hash->{READINGS}{"tempLow"}{VAL}.
" H ".$hash->{READINGS}{"tempHigh"}{VAL};
}
return undef;
}
#######################################################################################
#
# OWTHERM_GetValues - Updates the readings from device
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWTHERM_GetValues($@) {
my $hash = shift;
my $name = $hash->{NAME};
my $value = "";
my $ret = "";
#-- restart timer for updates
RemoveInternalTimer($hash);
InternalTimer(time()+$hash->{INTERVAL}, "OWTHERM_GetValues", $hash, 1);
#-- reset presence
$hash->{PRESENT} = 0;
#-- Get values according to interface type
my $interface= $hash->{IODev}->{TYPE};
if( $interface eq "OWX" ){
$ret = OWXTHERM_GetValues($hash);
}elsif( $interface eq "OWFS" ){
$ret = OWFSTHERM_GetValues($hash);
}else{
return "OWTHERM: GetValues with wrong IODev type $interface";
}
#-- process results
if( defined($ret) ){
return "OWTHERM: Could not get values from device $name";
}
$hash->{PRESENT} = 1;
$value=OWTHERM_FormatValues($hash);
#--logging
Log 5, $value;
$hash->{CHANGED}[0] = $value;
DoTrigger($name, undef);
return undef;
}
#######################################################################################
#
# OWTHERM_Set - Set one value for device
#
# Parameter hash = hash of device addressed
# a = argument string
#
########################################################################################
sub OWTHERM_Set($@) {
my ($hash, @a) = @_;
#-- for the selector: which values are possible
return join(" ", sort keys %sets) if(@a == 2);
#-- check syntax
return "OWTHERM: Set needs one parameter"
if(int(@a) != 3);
#-- check argument
return "OWTHERM: 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 "OWTHERM: Set with short interval, must be > 1"
if(int($value) < 1);
# update timer
$hash->{INTERVAL} = $value;
RemoveInternalTimer($hash);
InternalTimer(gettimeofday()+$hash->{INTERVAL}, "OWTHERM_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("OWTHERM: 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" ){
$ret = OWXTHERM_SetValues($hash,@a);
#-- OWFS interface
}elsif( $interface eq "OWFS" ){
$ret = OWFSTHERM_SetValues($hash,@a);
return $ret
if(defined($ret));
} else {
return "OWTHERM: Set with wrong IODev type $interface";
}
#-- process results - we have to reread the device
$hash->{PRESENT} = 1;
OWTHERM_GetValues($hash);
OWTHERM_FormatValues($hash);
Log 4, "OWTHERM: Set $hash->{NAME} $key $value";
return undef;
}
########################################################################################
#
# OWTHERM_Undef - Implements UndefFn function
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWTHERM_Undef ($) {
my ($hash) = @_;
delete($modules{OWTHERM}{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 = OWFSTHERM
#
########################################################################################
#
# OWFSTHERM_GetValues - Get reading from one device
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWFSTHERM_GetValues($)
{
my ($hash) = @_;
my $ret = OW::get("/uncached/".$hash->{OW_FAMILY}.".".$hash->{OW_ID}."/temperature");
if( defined($ret) ) {
$hash->{PRESENT} = 1;
$owg_temp = $ret;
$owg_th = OW::get("/uncached/".$hash->{OW_FAMILY}.".".$hash->{OW_ID}."/temphigh");
$owg_tl = OW::get("/uncached/".$hash->{OW_FAMILY}.".".$hash->{OW_ID}."/templow");
} else {
$hash->{PRESENT} = 0;
$owg_temp = 0.0;
$owg_th = 0.0;
$owg_tl = 0.0;
}
return undef;
}
#######################################################################################
#
# OWFSTHERM_SetValues - Implements SetFn function
#
# Parameter hash = hash of device addressed
# a = argument array
#
########################################################################################
sub OWFSTHERM_SetValues($@) {
my ($hash, @a) = @_;
#-- define vars
my $key = lc($a[1]);
my $value = $a[2];
return OW::put($hash->{OW_FAMILY}.".".$hash->{OW_ID}."/$key",$value);
}
########################################################################################
#
# The following subroutines in alphabetical order are only for a 1-Wire bus connected
# directly to the FHEM server
#
# Prefix = OWXTHERM
#
########################################################################################
#
# OWXTHERM_GetValues - Get reading from one device
#
# Parameter hash = hash of device addressed
#
########################################################################################
sub OWXTHERM_GetValues($) {
my ($hash) = @_;
my ($i,$j,$k);
#-- For default, perform the conversion NOT now
my $con=1;
#-- ID of the device
my $owx_dev = $hash->{ROM_ID};
#-- hash of the busmaster
my $master = $hash->{IODev};
#-- check, if the conversion has been called before - only on devices with real power
if( defined($attr{$hash->{IODev}->{NAME}}{buspower}) && ( $attr{$hash->{IODev}->{NAME}}{buspower} eq "real") ){
$con=0;
}
#-- if the conversion has not been called before
if( $con==1 ){
OWX_Reset($master);
#-- issue the match ROM command \x55 and the start conversion command
if( OWX_Complex($master,$owx_dev,"\x44",0) eq 0 ){
return "OWXTHERM: Device $owx_dev not accessible";
}
#-- conversion needs some 950 ms - but we may also do it in shorter time !
select(undef,undef,undef,1.0);
}
#-- NOW ask the specific device
OWX_Reset($master);
#-- issue the match ROM command \x55 and the read scratchpad command \xBE
#-- reading 9 + 1 + 8 data bytes and 1 CRC byte = 19 bytes
my $res=OWX_Complex($master,$owx_dev,"\xBE",9);
#Log 1,"OWXTHERM: data length from reading device is ".length($res)." bytes";
#-- process results
if( $res eq 0 ){
return "OWXTHERM: Device $owx_dev not accessible in 2nd step";
}
#my $res2 = "====> OWXTHERM Received ";
#for(my $i=0;$i<19;$i++){
# my $j=int(ord(substr($res,$i,1))/16);
# my $k=ord(substr($res,$i,1))%16;
# $res2.=sprintf "0x%1x%1x ",$j,$k;
#}
#Log 1, $res2;
#-- process results
my @data=split(//,$res);
#-- this must be different for the different device types
# family = 10 => DS1820, DS18S20
if( $hash->{OW_FAMILY} eq "10" ) {
if ( (@data == 19) && (ord($data[17])>0) ){
my $count_remain = ord($data[16]);
my $count_perc = ord($data[17]);
my $delta = -0.25 + ($count_perc - $count_remain)/$count_perc;
my $lsb = ord($data[10]);
my $msb = 0;
my $sign = ord($data[11]) & 255;
#-- test with -25 degrees
#$lsb = 12*16+14;
#$sign = 1;
#$delta = 0;
#-- 2's complement form = signed bytes
$owg_temp = int($lsb/2) + $delta;
if( $sign !=0 ){
$owg_temp = -128+$owg_temp;
}
$owg_th = ord($data[12]) > 127 ? 128-ord($data[12]) : ord($data[12]);
$owg_tl = ord($data[13]) > 127 ? 128-ord($data[13]) : ord($data[13]);
return undef;
} else {
return "OWXTHERM: Device $owx_dev returns invalid data";
}
} elsif ( ($hash->{OW_FAMILY} eq "22") || ($hash->{OW_FAMILY} eq "28") ) {
if ( (@data == 19) && (ord($data[17])>0) ){
my $lsb = ord($data[10]);
my $msb = ord($data[11]) & 7;
my $sign = ord($data[11]) & 248;
#-- test with -55 degrees
#$lsb = 9*16;
#$sign = 1;
#$msb = 7;
#-- 2's complement form = signed bytes
$owg_temp = $msb*16+ $lsb/16;
if( $sign !=0 ){
$owg_temp = -128+$owg_temp;
}
$owg_th = ord($data[12]) > 127 ? 128-ord($data[12]) : ord($data[12]);
$owg_tl = ord($data[13]) > 127 ? 128-ord($data[13]) : ord($data[13]);
return undef;
} else {
return "OWXTHERM: Device $owx_dev returns invalid data";
}
} else {
return "OWXTHERM: Unknown device family $hash->{OW_FAMILY}\n";
}
}
#######################################################################################
#
# OWXTHERM_SetValues - Implements SetFn function
#
# Parameter hash = hash of device addressed
# a = argument array
#
########################################################################################
sub OWXTHERM_SetValues($@) {
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];
$owg_tl = $value if( $key eq "tempLow" );
$owg_th = $value if( $key eq "tempHigh" );
#-- put into 2's complement formed (signed byte)
my $tlp = $owg_tl < 0 ? 128 - $owg_tl : $owg_tl;
my $thp = $owg_th < 0 ? 128 - $owg_th : $owg_th;
OWX_Reset($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 $select=sprintf("\x4E%c%c\x48",$thp,$tlp);
my $res=OWX_Complex($master,$owx_dev,$select,0);
if( $res eq 0 ){
return "OWXTHERM: Device $owx_dev not accessible";
}
DoTrigger($name, undef) if($init_done);
return undef;
}
1;
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