chch-power/light.sh

#!/bin/bash

TMPFILE=/tmp/light_state
touch $TMPFILE
LIGHT_STATE=$(cat $TMPFILE)
[ -z "$LIGHT_STATE" ] && LIGHT_STATE=0

STATE_0="a\x00\x03\x00\x00\x00;000000000000000000"
STATE_1="a\x00\x03\xff\xff\xff;255255255255255255"
STATE_2="n\x00\x02\x01\x00;170000070150000050"

LIGHT_STATE=$(( $LIGHT_STATE+1 ))
case $LIGHT_STATE in
	0)
	  STATE=$STATE_0
	  ;;
	1)
	  STATE=$STATE_1
	  ;;
	2)
	  STATE=$STATE_2
	  ;;
	*)
	  STATE=$STATE_0
	  LIGHT_STATE=0
	  ;;
esac

echo -en "$(echo "$STATE" | cut -d";" -f1)" > /dev/udp/172.23.92.15/49152 &
echo -en "$(echo "$STATE" | cut -d";" -f2)" > /dev/udp/172.23.92.16/31302 &
echo $LIGHT_STATE > $TMPFILE