diff --git a/fhem/www/gplot/hm-rt.gplot b/fhem/www/gplot/hm-rt.gplot
new file mode 100644
index 000000000..bf2c71ac0
--- /dev/null
+++ b/fhem/www/gplot/hm-rt.gplot
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+############################
+# Display the measured & desired temp and also the valve position.
+# Corresponding FileLog definition: 
+# define <filelogname> FileLog /var/log/fhem/hm-rt-%Y-%m.log <hm-rt name>
+
+set terminal png transparent size <SIZE> crop
+set output '<OUT>.png'
+set xdata time
+set timefmt "%Y-%m-%d_%H:%M:%S"
+set xlabel " "
+set ytics nomirror
+set y2tics
+#set ytics
+set title '<L1>'
+set grid xtics y2tics
+
+set y2label "Temperature in C"
+set ylabel "Valve Position (%)"
+
+#FileLog 4:measured-temp\x3a:0:
+#FileLog 4:desired-temp\x3a:0:
+#FileLog 4:ValvePosition\x3a:0:
+
+plot \
+  "< awk '/measured/{print $1, $4}' <IN>"\
+     using 1:2 axes x1y2 title 'Measured temperature' with lines,\
+  "< awk '/desired/{print $1, $4}' <IN>"\
+     using 1:2 axes x1y2 title 'Desired temperature' with lines,\
+  "< awk '/actuator/ {print $1, $4+0}' <IN>"\
+     using 1:2 axes x1y1 title 'Actuator (%)' with lines\