Is this ISCP part of the string required when hooked up directly via RS 232 too?
I am hooked up from Linux via PL2303 UBS <-> RS232 to an Onkyo 875 #!/bin/sh
stty 9600 cs8 ixoff -parenb crtscts -echo -F /dev/ttyUSB0
exec 3<>/dev/ttyUSB0
echo "!1PWRQSTN00" >&3
read response <&3
echo $responseBut there is no response...