ptlrc -d /dev/ttyUSB1 -b 1200 | \
awk \
'/°C/\    
    {
    sysstring=sprintf("echo -e -n temp=%s", $1)
    system(sysstring)
    if($1 > 24)
        {
        system("echo -en \"OFF                   \"")
        }

    if($1 < 21)
        {
        system("echo -en \"ON                    \"")
        }
    }\
'