Shell Programming and Scripting

Leave it \r\n if it works

It does the same thing when I try T="\r"

It mutes the amplifier!, so no difference there...

I want to build on this working script, to make a script that switches between channels if my TV is on, or my pc is on. I will try some things out. Is it ok if I get stuck again that I ask you for some more advice?

You made my day allready so thank you very very much! learned allot today!

Of course, that's what these forums are for, glad to help.

By definition, command substitution:

Code:

REPLY=$(amp "?p")

strips any trailing <newline> characters. For example:

Code:

printf "%s" $(printf "abc\r\n\n")

produces the output:

Code:

0000000   141 142 143 015                                                
           a   b   c  \r                                                
0000004

Hi! Sorry to bring up this old post, But I have the same Pioneer amplifier as thread starter, only mine is two years newer (VSX-923 instead of VSX-921). My goal is to adjust volume and the On/off switch with hotkeys from my mac. I've succeeded getting hot keys for volume up and down, but I have some trouble with the power. I've been using code from this thread, but still haven't been able to work it out.

The problem is that this line:

Code:

printf "%s\r\n" "?p" | nc pioneer.local 8102 -q 2

doesn't return the current power state (PWR0 / PWR1), like it did with the thread starter. It doesn't return anything at all! I can send commands with this type of command, but I cant receive any information. I want to key on my mac to either turn the receiver on or off, based on the power state, PWR0 / PWR1. I can receive this info if I use telnet instead of netcat, but I haven't been able to store that text string.

Could you show a telnet trace of what you want?

Yes, If I run the command:

Code:

{ echo '?P'; sleep 2; } | telnet pioneer.local

The output looks like this:

Code:

Hanss-MacBook:Scripts hansi$ (echo "?P"; sleep 2; ) | telnet pioneer.local
Trying 192.168.0.8...
Connected to pioneer.local.
Escape character is '^]'.
BridgeCo AG Telnet server
PWR0
Connection closed by foreign host.

I want to store the current power state PWR0/PWR1 as a string/variable, and then run a query to power the amplifier on if PWR1 = true, and power it off if PWR0 = true (I don't know why they've called PWR1 standby mode, but that downs't matter really).

I want to do something like this, and REPLY should contain either PWR1 or PWR0:

Code:

REPLY=${ echo '?P'; sleep 2; } | telnet pioneer.local

echo "got reply = $REPLY"

Do you got any clue?