HEYU: Can’t open tty line. Check the permissions.

by Ron | Jun 20, 2008 | Linux | 3 comments

I occasionally get this error when trying to run a heyu command from CLI. This should fix your problem:

(As root)

chmod 777 /dev/ttyS0

3 Comments

nigratruo on July 8, 2013 at 6:11 pm

Not an elegant solution at all. So instead of getting proper permissions, getting the right key, you just remove the lock to your door all together, so that everybody can enter. Please remember that this is OK for a temporary solution, but that any user on your server, a hacker or something, no matter how low a user can control your heyu and therefore your home automation.
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Cran on October 1, 2010 at 7:00 pm

Thanks! That did it!!
– rob
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Marc on November 13, 2008 at 9:27 pm

Thanks for the info! This helped 🙂
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