On Mon, Mar 15, 2010 at 11:40:12AM -0600, Dave Smith wrote:
>
> The part arrived today and after a few minutes of hacking, it works
> beautifully. I didn't have to install or configure anything for
> /dev/ttyUSB0 to appear. And now I have a very simple python script that
> can turn the relay on:
>
> f=open("/dev/ttyUSB0","wb")
> for byte in [0xff, 0x01, 0x00]:
> f.write(chr(byte))
> f.close()
>
> (Is there a one-liner to do this?)
Write that to myscript.py and your one-liner is "myscript.py". :) Python
really isn't about one-liners. Fortunately, modern Linux distributions
come with filesystems, so creating files is easy. :)
If you really wanted to do a one liner, I'm sure there are plenty of
ways that are possible, but I personally think your script is great
as-is.
> I wired the relay such that when the USB connection is lost, the power
> stays on. It works wonderfully.
Cool. Thanks for sharing your fun hack.
--
Andrew McNabb
http://www.mcnabbs.org/andrew/
PGP Fingerprint: 8A17 B57C 6879 1863 DE55 8012 AB4D 6098 8826 6868
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