54 lines
2.2 KiB
Markdown
54 lines
2.2 KiB
Markdown
NAD Link for Raspberry Pi
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=====
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Thanks to Morten Hustveit who [did all the work](http://www.ping.uio.no/~mortehu/nadlink/).
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This works well on my C350 amp – a quick bodge connecting a GPIO pin and ground pin to an RCA connector was all that was needed. It seems happy enough with 3.3v instead of the specified 5.
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Specify the correct pin in the script.
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I like to do the following in my `.zshrc`:
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````
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alias nad='python /opt/nad-link/nad-link.py'
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````
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And on my other computers:
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````
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alias nad='ssh pi -t python /opt/nad-link/nad-link.py'
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````
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(The `-t` tells ssh to imitate a terminal so the SIGTERM from pressing `^C` is forwarded. This is helpful in order to kill the command properly, and thus stop volume changes at the intended moment before waking up the entire town.)
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Then it's just
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````
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$ nad on
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$ nad off
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$ nad up
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$ nad down
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````
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etc. etc.
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Daemon
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-----
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I've now included an example of a very simple daemon which listens for volume control events from my Bluetooth remote (or therefore, presumably, any keyboard's volume keys) and launches the script to do the relevant volumizing.
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Futility
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--------
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It's been pointed out that I could have just used `lirc` and saved a lot of effort. This is most likely a correct observation, but by doing that I wouldn't have learned anything, and would have probably just spent time getting annoyed by boring problems configuring it to use GPIO. Too much like work! So no complaining from me.
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Config
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-----
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Just change the config at the top of the script. Alias remote codes however you like.
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~~I'll point you again at [Morten Hustveit's page](http://www.ping.uio.no/~mortehu/nadlink/).~~ The page is gone, apparently forever.
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I've [tried to convert](https://github.com/tsprlng/nad-link/issues/4) the Crestron codes NAD provide and included them here in [the remote-codes directory](./remote-codes). Some of them have a trailing '3' for some reason which makes them longer than the normal 4 bytes. I don't have a NAD CD player so have no idea what's going on or what is correct.
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For different equipment just extract the right remote codes (it's easy to enter hex into YAML). Be aware that my script expects them in normal left-to-right reading endianness (whichever that is) so just take the binary and hexify it.
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