newbie question - MySensors serial gateway

[scottyaustria]

Hi @ all!

New to home automation and eager to implement some sort on home automation in the flat.
However I have two main issue at the moment:
I have a few mysensors assembled with pro mini 3.3v 8Mhz, and all seem to work fine.
MyController is running on raspi B+ with a Arduino Nano connected via USB as serial gateway. I get the data alright and everything seems to work, but when I reboot the raspi the interface of the gateway seems to change every time. Once its /dev/ttyAMA0 after the next reboot its ttyUSB0, the again AMA0.
What am I doing wrong or do my WLAN USB dongle and/or wireless keyboard dongle mix up the USB config of the raspi?
Any ideas?

The second one is, that when the server stars on the raspi I always the this message:

*2016-05-31 10:32:31,810 ERROR [main] [org.mycontroller.standalone.AppProperties:342] Unable to create tmp location, Location:tmp/

I tried creating the folder tmp in various locations with different rights. No success. Is this a normal issue , can I ignore it?
I also changed the setting from tmp to ../tmp or /home/pi/mycontroler/tmp..... etc.

Thanks for your help.

Cheers from AT

[jkandasa]

@scottyaustria

For USB name change problem please refer: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=85435

2016-05-31 10:32:31,810 ERROR [main] [org.mycontroller.standalone.AppProperties:342] Unable to create tmp location, Location:tmp/

Simply ignore this error ^^^ which is fixed in recent version of MyController.