nell'ottica del lavoraccio che avete fatto, uno scopo potrebbe essere quello di abbattere i consumi non necessari, anche quelli bassi... 
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cp -v /var/www/123solar/admin/.ht* /var/www/123solar/admin
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ln -s /var/www/metern/comapps /usr/local/bin/pooler485
ln -s /var/www/metern/comapps/pooler485.sh /usr/local/bin/pooler485
I use this pooler485.sh file
#!/bin/bash
ADDRESSES="$1"
BAUD_RATE="$2"
DEVICE="$3"
ADDR_ARR=$(echo $ADDRESSES | tr "," "\n")
while [ true ]; do
ID=0
POWER=""
ENERGY=""
for ADDRESS in $ADDR_ARR
do
#((ID++))
ID=$ADDRESS
CMD="sdm120c -a ${ADDRESS} -b ${BAUD_RATE} -z 10 -i -p -v -c -f -g -P E -q ${DEVICE}"
#echo $CMD
VALUE=`$CMD`
VOLTAGE=$(echo ${VALUE} | awk '{print $1}')
CURRENT=$(echo ${VALUE} | awk '{print $2}')
POWER=$(echo ${VALUE} | awk '{print $3}')
FACTOR=$(echo ${VALUE} | awk '{print $4}')
FREQUENCY=$(echo ${VALUE} | awk '{print $5}')
ENERGY=$(echo ${VALUE} | awk '{print $6}')
if [ "$ENERGY" != "0" -a x"$ENERGY" != x -a "$POWER" != "0" -a x"$POWER" != x ]; then
echo -e "$ID($POWER*W)\n$ID($ENERGY*Wh)\n${ID}_1($VOLTAGE*V)\n${ID}_2($CURRENT*A)\n${ID}_3($FREQUENCY*Hz)\n${ID}_4($FACTOR*F)" > /run/shm/metern${ADDRESS}.txt
#echo -e "$VALUE" > /run/shm/metern${ADDRESS}.txt
fi
sleep 5s
done
done
cat /etc/rc.local
ls -l /run/shm
sdm120c | head -n 1
cat /etc/rc.local
ls -l /run/shm
sdm120c | head -n 1
/usr/bin/curl http://127.0.0.1/metern/scripts/bootmn.php
if (isset($_SERVER['REMOTE_ADDR'])) {
die('Direct access not permitted');
}
// Startup of the com apps daemon as 'http' user if needed
$output = shell_exec('pkill -f pooler485 > /dev/null 2>&1 &');
sleep(1);
$output = shell_exec('pooler485 1 9600 /dev/meterN > /dev/null 2>/dev/null &');
?>
RENDIMENTO-SOLAREsdm120c -a -1 -b 2400 -P N /dev/ttyUSB0
sdm120c -a -1 -b 2400 -P E /dev/ttyUSB0
df -h
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