saladtestingbox/salad/checkled.sh

#!/bin/sh
HOUR=`date "+%H"`
cd /salad
echo "231" > /dev/ttyUSB0
LEDST=`dd if=/dev/ttyUSB0 count=1`
CH1STATUS="$(echo "${LEDST}" | tr -d '1')"

if [ "$HOUR" = "10" ] || [ "$HOUR" = "11" ] || [ "$HOUR" = "12" ] || [ "$HOUR" = "13" ] || [ "$HOUR" = "14" ] || [ "$HOUR" = "15" ] || [ "$HOUR" = "16" ] || [ "$HOUR" = "17" ]
then
    if [ "$CH1STATUS" = "t" ]; then
        echo "221" > /dev/ttyUSB0
        echo "led off"
    fi
else
    if [ "$CH1STATUS" = "f" ]; then
        echo "211" > /dev/ttyUSB0
        echo "led on"
    fi
fi