--- /dev/null
+#!/bin/bash
+
+# (C) 2018 Jan-Simon Möller, dl9pf@gmx.de, jsmoeller@linuxfoundation.org
+# License: Apache License 2.0
+
+#set -x
+set -e
+
+if [ $1 ] ; then
+ # The device is always 0009 -> 9 . Only change is the i2c IF .
+ LED=`echo $1 | sed -e "s#0009#9#g"`
+ if [ $? -eq 0 ] ; then
+ echo "$LED"
+ sed -e "s#@DEVICE@#$LED#" /etc/hvac.json.in > /etc/hvac.json
+ else
+ echo "Invalid argument"
+ exit 1
+ fi
+else
+ echo "Need argument"
+ exit 1
+fi
\ No newline at end of file