Switched to /dev/ttySX after discovering that the /dev/ttyOX devices are 
for backwards compatibility and not needed. 

Somehow systemd manages those as well, so I had to add this line to my unit 
to wait for /dev/ttyS2 to be "ready" (which, in this case, means adding 
read-write permissions for group "dialout")
After=dev-ttyS2.device

--
Kind regards,
Tarmo Kuuse

On Tuesday, January 24, 2017 at 11:57:40 AM UTC+2, Tarmo Kuuse wrote:
>
> Hi! 
>
> Which systemd unit initializes the ttyOX symlinks to UARTs 
> (/dev/ttyO1,...) during boot? In the 2017-01-15 seeed-iot image. 
>
> I wish to start my service which expects those links to be there, so I'd 
> need to pass to it the correct "After" dependency. Until now I thought 
> "capemgr" service created the links, but apparently  it doesn't. Maybe udev 
> then? 
>
> --
> Kind regards, 
> Tarmo Kuuse 
>
>

-- 
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