Hey!
Orange / Raspberry AFRNClient image probably work really well and is a low-power I have tested, weather condition tests of these devices. 2 - year ip67 - in a shielded case and no rust or use problems.
and installation is easy if you just understand the Linux commands and also have very low power systems.
Resistant to frosty Rasberry PI -22 * c degrees in Finnish conditions in winter protected in ip67 case.
You can look a bit more
here
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We are Europe, Finland, Turku areas PMR446 - radio hobbyists.
http://tarh.fi and FinFRN - radionetwork Finland -
http://frn.fi