AT module and RN2483: not working with my Linux box

@DrAzzy Thx for the link! I was looking for such an assembled board. They seem to be rare up to now... The link is now part of the guide.
The current module is kind of minimalist. Based on people inputs, it should:

• implement OTAA authentication
  
• provide a bandwidth-efficient way of detecting a valid link (mac set linkchk ?!?)
  
• provide a convenient method to poll the RX mailbox
  
  

If you have already done such things, it could be very helpful to share your work.
Anyway I will probably do it by myself too, just for my curiosity ;-)