Hi Kibet,
The successfull access through OTAA with LMIC was on a RaspBerryPi.
I have now done some testing with an Arduino and the LMIC software from @matthijs (https://github.com/matthijskooijman/arduino-lmic).
This works with the original AES implementation. I do see very varying JOIN times, in the order of 1-3 minutes, which I find very slow.
(BTW I also tested OTAA with the alternative AES implementations @matthijs presented; With those AES versions OTAA does not seem to work at all. I’m still looking at that.)
Ernst