The use of echo-e "\ 029"
does not work either.
But if use strg + alt gr + ] directly in a terminal session -> it works.
I have to ask my question more concretely:
I connect an RF generator (AGILENT) via Telnet/SCPI.
If I do this manual on terminal and press at the end of the session CTRL + ALT GR +] for '^]' then close the scpi session properly and I can type quit
to close the telnet session properly.
There is no error message on the display of the RF generator. So it should be.
If I do this via script the SCPI session seems not to recognize the break signal condition '^]' and will be forced to close after the end of the script (telnet and scpi). -> Message: "Disconnected by foreign host". Unfortunately, I get error messages on the display of the RF generator -> "invalid header", etc.
After successful connection appears: Connected to 192,168.10.66 Escape Character is ‘^]’ -> This is the point at issue. Manual entry in the terminal works correctly, script does not work.
My script looks something like this:
function getIDNMessage()
{
(
echo open $1 $2
sleep 1
echo "*IDN?"
sleep 1
echo –e "\029" # or echo “^]” does not work well
sleep 1
echo "quit\r"
sleep 1
) | telnet > scpi_telnet.log 2>&1
}
getIDNMessage 192.168.10.66 7777
On Linux it's actually:
CTRL + ] then ENTER
Finally type in the quit
command.
^]
telnet> quit
Connection closed.
[fred@localhost ~]$