Digitaler Bilderrahmen mit lcd4linux

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Diese Seite beschreibt die Verwendung eines Digitalen Bilderrahmens (DPF) als Display für FHEM. Die Anbindung erfolgt dabei an einen separaten Raspberry Pi, auf welchem lcd4linux läuft. Dies ermöglicht die Verwendung einer Vielzahl von verschiedenen preiswerten Displays, die keine großartigen Fähigkeiten aufweisen müssen.

Auf der Seite Digitaler Bilderrahmen wird ein Ansatz beschrieben, der mit komplexeren DPF arbeitet. 20140909 123726.jpg

Voraussetzungen

  • Digitaler Bilderrahmen, der über lcd4linux ansteuerbar ist, z.B. Samsung SPF85H.
  • Raspberry Pi mit LAN oder WLAN Interface.

Achtung: Prinzipiell ließe sich das lcd4linux auch auf FHEM-Rechner installieren - allerdings sind Performance-Probleme auf den hier verwendeten Kleinstrechnern nicht ausgeschlossen.

Installation

Auf dem Raspberry Pi sind die Anwendungen socat, ImageMagick und lcd4linux zu installieren. lcd4linux sollte beim Hochfahren des Raspberry Pi automatisch starten.

Werte holen von FHEM

Zunächst wird (z.B. im Verzeichnis /opt/fhem) eine Skriptdatei getFHEM.sh angelegt.

#!/bin/bash
#
#   script to read FHEM values
#
#   Prof.Dr. Peter A. Henning, July 2014
#
round()
{
echo $(LANG=C printf %.$2f $(echo "scale=$2;(((10^$2)*$1)+0.5)/(10^$2)" | bc))
};
#
arg=$1
#
#-- get FHEM values
alarm='{Value("WZ.SPF.alarm")."|"}'
warn='{Value("WZ.SPF.warn")."|"}'
scharf='{AttrVal("AAA","level6xec","")}'
aowb='{Value("A.OWB")}'
aowbt='{Value("A.OWB.T")}'
wzowm='{Value("WZ.OWM")}'
nt5000a='{$defs{"nt5000"}{"STATE"}}'
nt5000b='{$defs{"nt5000"}{"READINGS"}{"Wd"}{"VAL"}}'
everb='{Value("E.Verb")}'
gverb='{Value("G.Verb")}'
FHEM=`echo -e "$alarm;$warn;$scharf;$aowb;$aowbt;$wzowm;$everb;$gverb;$nt5000b;$nt5000a" | socat -t50 - TCP:<IP-Adresse von FHEM> 
#
#--isolate separate values
alarm=`echo $FHEM | cut -d '|' -f1`
warn=`echo $FHEM | cut -d '|' -f2 | sed 's/^ *//'`
FHEM3=`echo $FHEM |  cut -d '|' -f3`
scharf=`echo $FHEM3 | awk '{print $1}' | sed 's/sharp/scharf/'`
rHa=$(round `echo $FHEM3 | awk '{print $3}'` 0)
Ta=$(round `echo $FHEM3 | awk '{print $15}'` 1)
pa=$(round `echo $FHEM3 | awk '{print $12}'` 0)
rHi=$(round `echo $FHEM3 | awk '{print $18}'` 0)
Ti=$(round `echo $FHEM3 | awk '{print $21}'` 1)
evp=$(round `echo $FHEM3 | awk '{print $27}'` 2)
evw=$(round `echo $FHEM3 | awk '{print $24}'` 1)
gvp=$(round `echo $FHEM3 | awk '{print $36}'` 2)
gvw=$(round `echo $FHEM3 | awk '{print $33}'` 2)
pvpraw=`echo $FHEM3 | awk '{print $42}'`
pvp=$(round $pvpraw 2)
pvw=$(round `echo $FHEM3 | awk '{print $41}'` 1)
#
if [ "$arg" == "show" ]; then
  echo "alarm=$alarm warn=$warn => $scharf; Climate=>$rHa $Ta $pa $rHi $Ti; PV=> $pvpraw $pvp $pvw; EV=> $evp $evw; GV=>$gvp $gvw" 
fi
#
#--create bar graphs
./createAlarm.sh "$alarm" "$warn" $scharf &
./createBar.sh $pvw 35 kWh $pvp kW 200x150 green PV solar.png &
./createBar.sh $evw 35 kWh $evp kW 200x150 blue EV strom.png &
./createBar.sh $gvw 20 m³ $gvp m³/h 200x150 red GV gas.png &
./createTemp.sh $Ti $rHi $Ta $rHa $pa &
./createDate.sh & 

Diese Datei wird nun mit crontab -e in die Tabelle des cron-Dämons eingetragen. Mit der folgenden Zeile wird das Skript automatisch jede Minute ausgeführt.

  • * * * * /opt/fhem/getFHEM.sh

lcd4linux konfigurieren

Dazu wird in die Datei /etc/lcd4linux.conf folgendes geschrieben:

Display dpf {
   Driver     'SamsungSPF'
   Port       'usb0'    
   Model      'SPF-85H'
   Font       '96x128'
   Foreground 'ffffff'
   Background '000000'
   Basecolor  '000000'
   Backlight 7 
   Orientation 1
}
Variables {
 tick 1000
 dick 2000 
 pick 10000
 minute 60000
 hminute 30000
}
Widget Foto {
 class  'Image'
 file   '/root/back.png'
 update hminute
 reload  1
 visible 1
 inverted 0
}
Widget Alarm {
 class  'Image'
 file   '/root/alarm.png'+
 update hminute
 reload  1
 visible 1
 inverted 0
}
Widget Solar {
 class  'Image'
 file   '/root/solar.png'
 update hminute 
 reload  1
 visible 1
 inverted 0
}
Widget Strom {
 class  'Image'
 file   '/root/strom.png'
 update hminute 
 reload  1
 visible 1
 inverted  0
}
Widget Gas {
 class  'Image'
 file   '/root/gas.png'
 update hminute
 reload  1
 visible 1
 inverted  0
Widget Temp {
 class  'Image'
 file   '/root/temp.png'
 update hminute 
 reload  1
 visible 1
 inverted 0
} 
Widget Date {
 class  'Image'
 file   '/root/date.png'
 update hminute
 reload  1
 visible 1
 inverted 0
}
#####################################################################
Display 'DPF'
#####################################################################
Layout Normal {
# X/Y exchanged !!
 Layer 1 {
   X0.Y0 'Foto'
   X450.Y0 'Alarm'
   X0.Y600 'Date'
   X150.Y600 'Temp'
   X450.Y600 'Strom'
   X450.Y400 'Solar'
   X450.Y200 'Gas'
 }
}


Erzeugung einer Fotodatei

Erzeugung eines PNG-Files aus einer aus einem Ordner zufällig ausgewählten anderen Datei. Dazu wird im Verzeichnis /opt/fhem die Datei createPic.sh angelegt:

#!/bin/bash
#
#   script to produce a photo PNG file using ImageMagick convert
#
#   Prof.Dr. Peter A. Henning, July 2014
#
# 
#-- Directory Containing Pictures
DIR="/root/Bilder"
#
# Command to Select a random jpg file from directory
pic=$(ls $DIR | shuf -n1)
#
#-- Correct the size
convert $DIR/$pic -resize 600x450 back.png
#convert $DIR/$pic -rotate -90 -resize 450x600 back.png

Erzeugung einer Datumsanzeige

Erzeugung eines Bildes mit dem gegenwärtigen Datum und der jetzigen Zeit. Dazu wird im Verzeichnis /opt/fhem die Datei createDate.sh angelegt:

#!/bin/bash
#
#   script to produce a date PNG file using ImageMagick convert
#
#   Prof.Dr. Peter A. Henning, July 2014
#
#
#--date pieces
ddate=`date +%a%_3e.%_4b%_5Y`
dtime=`date +%k:%M`
#
convert -size 320x240 canvas:none -stroke snow4 -size 1x90 -tile gradient:white-snow4 \
      \( +clone -background snow4 -shadow 80x3+3+3 \) \
 +swap -background none -layers merge \
      \( +size -font Helvetica \
         -pointsize 75 -strokewidth 1 -fill red label:"$dtime" -trim -repage 0x0+25+60 \
             \( +clone -background firebrick3 -shadow 80x3+3+3 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 35 -strokewidth 1 -fill blue label:"$ddate" -trim -repage 0x0+25+150 \
             \( +clone -background slateblue4 -shadow 80x1+2+2 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
 -append -background white -gravity center -extent 320x240 \
 b_date.png
#  
#-- correct the size
convert b_date.png -resize 200x150 date.png

Erzeugen einer Temperaturanzeige

Dazu wird im Verzeichnis /opt/fhem die Shell-Datei createTemp.sh angelegt.

#!/bin/bash
#
#   script to produce a temperature PNG file using ImageMagick convert
#
#   Prof.Dr. Peter A. Henning, July 2014
# 
#
# parameters for internal temperature/humidity
ti=$1
rhi=$2
# parameters for external temperature/humidity/pressure 
ta=$3
rha=$4
pa=$5
#
#-- formatted temperature valuesa
deg=`printf "\u00B0C"`
tif="$ti $deg"
taf="$ta $deg"
#
#-- formatted humidity values
rif="$rhi %"
raf="$rha %"
#
#-- formatted pressure
paf="$pa hPa"
 #
convert -size 320x480 canvas:none -stroke snow4 -size 1x90 -tile gradient:white-snow4 \
      \( +clone -background snow4 -shadow 80x3+3+3 \) \
 +swap -background none -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill black label:"Innen" -trim -repage 0x0+20+20 \
   \( +clone -background darkslategray -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 75 -strokewidth 1 -fill red label:"$tif" -trim -repage 0x0+20+60 \
             \( +clone -background firebrick3 -shadow 80x3+3+3 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 50 -strokewidth 1 -fill blue label:"$rif" -trim -repage 0x0+20+140 \
             \( +clone -background slateblue4 -shadow 80x1+2+2 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill black label:"Außen" -trim -repage 0x0+20+240 \
             \( +clone -background darkslategray -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 75 -strokewidth 1 -fill red label:"$taf" -trim -repage 0x0+20+280 \
             \( +clone -background firebrick3 -shadow 80x3+3+3 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 50 -strokewidth 1 -fill blue label:"$raf" -trim -repage 0x0+20+360 \
             \( +clone -background slateblue4 -shadow 80x1+2+2 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 50 -strokewidth 1 -fill blue label:"$paf" -trim -repage 0x0+20+420 \
             \( +clone -background slateblue4 -shadow 80x1+2+2 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 50 -strokewidth 1 -fill blue label:"$rif" -trim -repage 0x0+20+140 \
             \( +clone -background slateblue4 -shadow 80x1+2+2 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill black label:"Außen" -trim -repage 0x0+20+240 \
             \( +clone -background darkslategray -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 75 -strokewidth 1 -fill red label:"$taf" -trim -repage 0x0+20+280 \
             \( +clone -background firebrick3 -shadow 80x3+3+3 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 50 -strokewidth 1 -fill blue label:"$raf" -trim -repage 0x0+20+360 \
             \( +clone -background slateblue4 -shadow 80x1+2+2 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 50 -strokewidth 1 -fill blue label:"$paf" -trim -repage 0x0+20+420 \
             \( +clone -background slateblue4 -shadow 80x1+2+2 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
 -append -background white -gravity center -extent 320x480 \
 b_temp.png
#
# correct the size
convert b_temp.png -resize 200x300 temp.png
#convert b_temp.png -rotate -90 -resize 300x200 temp.png

Erzeugen von Balkendiagrammen

Balkendiagramme werden erzeugt, indem die von FHEM übermittelten Werte mittels eines weiteren Skripts als Eingabeparameter für das Programm convert aus der ImageMagick-Suite benutzt werden. Drei verschiedene Farbschemata für diese Diagramme - genannt green, red und blue -- sind hier vordefiniert

Hierzu wird (z.B. im Verzeichnis /opt/fhem) eine Skriptdatei createBar.sh angelegt:

!/bin/bash
#
#   script to produce a bar graph PNG file using ImageMagick convert
#
#   Prof.Dr. Peter A. Henning, July 2014
#
# parameters for bar graph
value=$1
maxim=$2
unita=$3
# parameters for top number
numbr=$4
unitb=$5
# picture size, color scheme, label and filename
picsz=$6
color=$7
label=$8
fname=$9
#
#-- color scheme
case $color in
       "green" )
               gradient1="gradient:chartreuse-green"
               gradient2="gradient:chartreuse1-chartreuse3"
               labcol1="springgreen4"
               labcol2="darkolivegreen"
               labcol3="darkslategray"
               labcol4="white"
               ;;
       "red" )
               gradient1="gradient:lightsalmon-red"
               gradient2="gradient:lightsalmon1-lightsalmon3"
               labcol1="firebrick4"
               labcol2="lightsalmon3"
               labcol3="indianred4"
               labcol4="white"
               ;;
       "blue" )
               gradient1="gradient:cyan-blue"
               gradient2="gradient:cyan1-cyan3"
               labcol1="blue"
               labcol2="slateblue4"
               labcol3="darkslateblue"
               labcol4="white"
               ;;
esac
#
#-- bar graph
bvalue="$1 $3"
xvalue=`echo "($1*248)/$2+36" | bc`
lvalue=`echo "$xvalue-20" | bc`
rvalue=`echo "$xvalue+20" | bc`
# 
#-- position and color bar graph number
if [ $xvalue -lt 160 ]; then
  labx="0x0+160+35"
  labcolf=$labcol1
  labcols=$labcol2
else
  labx="0x0+40+35"
  labcolf=$labcol3
  labcols=$labcol4
fi 
#
#-- formatted top value
tvalue="$4 $5"
#
convert -size 320x90 canvas:none -stroke snow4 -size 1x90 -tile gradient:white-snow4 \
 -draw "roundrectangle 16, 5, 304, 85 20,40" +tile -fill snow \
 -draw "roundrectangle 264, 5, 304, 85  20,40" -tile $gradient1 \
 -draw "roundrectangle 16,  5, $rvalue, 85  20,40" -tile $gradient2 \
 -draw "roundrectangle $lvalue, 5, $rvalue, 85  20,40" +tile -fill none \
 -draw "roundrectangle 264, 5, 304, 85 20,40" -strokewidth 2 \
 -draw "roundrectangle 16, 5, 304, 85 20,40" \
    \( +clone -background snow4 \
       -shadow 80x3+3+3 \) \
 +swap -background none -layers merge \
    \( +size -font Helvetica \
       -pointsize 25 -strokewidth 1 -fill $labcolf label:"$bvalue" -trim -repage $labx \
           \( +clone -background $labcols -shadow 80x1+2+2 \) \
       +swap -background none -layers merge \) \
 -insert 1 -layers merge \
    \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill black label:"$label" -trim -repage 0x0+20+92 \
                     \( +clone -background gray40 -shadow 80x1+2+2 \) \
                             +swap -background none -layers merge \) \
 -insert 1 -layers merge \
    \( +size -font Helvetica \
       -pointsize 65 -strokewidth 1 -fill red label:"$tvalue" -trim +repage \
           \( +clone -background firebrick3 -shadow 80x3+3+3 \) \
       +swap -background none -layers merge \) \
 -insert 0 -gravity center -append -background white -gravity center -extent 320x240 \
 b_$fname
#
#-- correct the size
convert b_$fname -resize $6 $fname

Erzeugung eines Alarmbildes

Hier wird eine Bilddatei mit Alarmmeldungen aus FHEM erzeugt. Der Name der Skriptdatei ist createAlarm.sh

!/bin/bash
#
#   script to produce an alarm PNG file using ImageMagick convert
#
#   Prof.Dr. Peter A. Henning, July 2014
#
#
# parameter for internal string
# if missing, only rename files
alarm=$1
warn="$2"
scharf=$3
#
if [ "$scharf" == "scharf" ]; then
  colalarm1="red"
  colalarm2="firebrick3"
else
  colalarm1="black"
  colalarm2="darkslategray"
fi
#
########################################## Keine Störung ##################################
#
 if [ "$alarm" == "no_alarm" -a "$warn" == "no_warning" ]; then
 convert -size 320x240 canvas:none -stroke snow4 -size 1x90 -tile gradient:white-snow4 \
      \( +clone -background snow4 -shadow 80x3+3+3 \) \
 +swap -background none -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill black label:"Keine Störung" -trim -repage 0x0+20+60 \
             \( +clone -background darkslategray -shadow 80x1+1+1 \) \
      \( +clone -background darkslategray -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill $colalarm1 label:"Alarmanlage $scharf" -trim -repage 0x0+20+120 \
             \( +clone -background $colalarm2 -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
 -append -background white -gravity center -extent 320x240 \
 b_alarm.png 
 fi
#
########################################## Störungmeldung #################################
#
 if [ "$alarm" == "no_alarm" -a "$warn" != "no_warning" ]; then
   todate=`date +"%H%M"`
 #-- serious warning during nighttime
 if [ $todate -ge 2200 ] || [ $todate -le 600 ] ; then
 convert -size 320x240 canvas:none -stroke gold2 -size 1x90 -tile gradient:yellow-gold2 \
      \( +clone -background gold2 -shadow 80x3+3+3 \) \
 +swap -background none -layers merge \
     \( +size -font Helvetica \
         -pointsize 35 -strokewidth 1 -fill red label:"$warn" -trim -repage 0x0+20+60 \
             \( +clone -background firebrick3 -shadow 80x3+3+3 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill $colalarm1 label:"Alarmanlage $scharf" -trim -repage 0x0+20+120 \
             \( +clone -background $colalarm2 -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +clone -background darkslategray -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill $colalarm1 label:"Alarmanlage $scharf" -trim -repage 0x0+20+120 \
             \( +clone -background $colalarm2 -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
 -append -background white -gravity center -extent 320x240 \
 b_alarm.png 
 fi
#
########################################## Störungmeldung #################################
#
 if [ "$alarm" == "no_alarm" -a "$warn" != "no_warning" ]; then
   todate=`date +"%H%M"`
 #-- serious warning during nighttime
 if [ $todate -ge 2200 ] || [ $todate -le 600 ] ; then
 convert -size 320x240 canvas:none -stroke gold2 -size 1x90 -tile gradient:yellow-gold2 \
      \( +clone -background gold2 -shadow 80x3+3+3 \) \
 +swap -background none -layers merge \
     \( +size -font Helvetica \
         -pointsize 35 -strokewidth 1 -fill red label:"$warn" -trim -repage 0x0+20+60 \
             \( +clone -background firebrick3 -shadow 80x3+3+3 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill $colalarm1 label:"Alarmanlage $scharf" -trim -repage 0x0+20+120 \
             \( +clone -background $colalarm2 -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
-append -background gold2 -gravity center -extent 320x240 \
 b_alarm.png
 #
 #-- just information during daytime 
 else
 #
 convert -size 320x240 canvas:none -stroke snow4 -size 1x90 -tile gradient:white-snow4 \
      \( +clone -background snow4 -shadow 80x3+3+3 \) \
 +swap -background none -layers merge \
     \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill black label:"$warn" -trim -repage 0x0+20+60 \
             \( +clone -background darkslategray -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill $colalarm1 label:"Alarmanlage $scharf" -trim -repage 0x0+20+120 \
             \( +clone -background $colalarm2 -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
 -append -background white -gravity center -extent 320x240 \
 b_alarm.png
 fi  
fi
#
########################################## Alarm ##########################################
#
 if [ "$alarm" != "no_alarm" ]; then
 convert -size 320x240 canvas:none -stroke firebrick3 -size 1x90 -tile gradient:red-firebrick3 \
      \( +clone -background firebrick3 -shadow 80x3+3+3 \) \
 +swap -background none -layers merge \
-pointsize 35 -strokewidth 1 -fill white label:"$alarm" -trim -repage 0x0+20+60 \
             \( +clone -background snow4 -shadow 80x3+3+3 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
      \( +size -font Helvetica \
         -pointsize 25 -strokewidth 1 -fill $colalarm1 label:"Alarmanlage $scharf" -trim -repage 0x0+20+120 \
             \( +clone -background $colalarm2 -shadow 80x1+1+1 \) \
         +swap -background none -layers merge \) \
 -insert 1 -layers merge \
 -append -background red -gravity center -extent 320x240 \
 b_alarm.png 
 fi
#
# correct the size
convert b_alarm.png -resize 200x150 alarm.png