PJL status readback commands - printing

Question

How to receive respond on Windows from printer after send PJL command?
I tried to spy network printer with WireShark and read printer socket directly but nothing work.

Answer 1

On windows is only possible with network printers with Paraphernalia. There is no bidirectional printer drivers for common models. So i have installed linux on virtualmachine.
I used the bidirectional USB driver on linux (the same drivers is on mint, *buntu distro) and execeute a pjl command from cmd.txt with this bash script below.
But i still cannot recognize when to read PJL Respond. Using fuser command to recognize /dev/usb/lp0 busy state does not work so i try to read in a loop with dd and check size of readback. It works but sometimes has to send PJL few times before got response.
#!/bin/bash
PRINTER=/dev/usb/lp0
ESCAPE=$(echo -e "\e")
FF=$(echo -e "\x0C")
char=
IFS=""
SSKIP=0
echo "" > a.txt
echo "" > b.txt
echo "" > temp.txt
while read p; do
echo -e "#######BEGIN$p-\r\n" >> a.txt
echo $p
while true
do
#WAIT FOR NOT BUSY
while true
do
fuser -s $PRINTER
if [ $? -ne 0 ]
then
break
fi
done
#send PJL to printer
echo -e "\e%-12345X#PJL\r\n#PJL INQUIRE $p \r\n\e%-12345X" > $PRINTER
#TRY TO READ IMMEDIATELY
char=$(dd if=$PRINTER of=temp.txt 2>&1)
#send escape after read
echo -e "\e" > "$PRINTER"
#CHECK THAT dd READ ANY BYTES
echo "$char" | grep "bytes copied" > /dev/null
if [ $? -ne 0 ]
then
printf "."
else
echo "$char" | grep "^0 bytes copied" > /dev/null
if [ $? -ne 0 ]
then
cat temp.txt >> b.txt
echo "" > temp.txt
break
else
printf "."
fi
fi
char=""
done
echo
echo -e "#######END$p-\r\n" >> a.txt
done <cmd.txt