Shell Programming and Scripting

Hi all!

I have a Pioneer VSX-921 which I am very happy about. It has airplay, lots of other features. One of them is controlling it with your Iphone and telnet.
And now it becomes interesting! I want to make a bash script to log into my amp, send a command: MZ (which means mute) and then exit the telnet session.

I allready installed telnet

Code:

sudo apt-get install telnet

I can login with: telnet 192.168.1.155 (it doesn't require a password and portnmbr)
its gives this:

Code:

Trying 192.168.1.155...
Connected to 192.168.1.155.
Escape character is '^]'.
BridgeCo AG Telnet server

and when I type MZ it mutes the amp.

Now, is it possible to put this into a script? I allready tried this:

Code:

#!/bin/sh

#################################################################

spawn telnet 192.168.1.155
send "MZ"

but is says unknown command spawn and send...

It is also possible to ask the amp what status it has (on/of, mute on/off, how high the volume is and etc) For example: when I type ?p it gives back a code PWR0 or PWR1 (so on or off)

I want to make a script that checks if the amp is on, and if so, it mutes the amp when the script is run.

If I can get some kind of example that would be great!, I can experiment from there... But now, i am stuck :roll:

Thanks anyway!