OTAA is almost fine with Arduino-1.8.12

[clavisound]

Compiles fine with OTAA (not tested with device)

One problem with OTAA two with ABP.

1. Overflows for DR's 0-2 - unable to solve it. Will think about it.

     ((128 << 7) * MICROS_PER_SECOND + 500000) / 1000000, // SF12BW125 BUG with overflow.
/home/USER/Arduino/libraries/SlimLoRa-master/SlimLoRa.cpp:67:17: warning: integer overflow in expression [-Woverflow]
     ((128 << 5) * MICROS_PER_SECOND + 500000) / 1000000, // SF10BW125 BUG with overflow.```

2. With ABP I have this error - unable to solve it.
```/tmp/ccL4MkTE.ltrans0.ltrans.o: In function `SlimLoRa::ProcessDownlink(unsigned char)':
/home/USER/Arduino/libraries/SlimLoRa-master/SlimLoRa.cpp:980: undefined reference to `SlimLoRa::CheckMic(unsigned char*, unsigned char*)'```

I hope tomorrow to test with device. (Feather 32u4)

[clavisound]

Wow. Tested OTAA with device, it seems it works. I am feeling blessed with your work.

Now I have to test more uplinks, ADR, ABP.

I don't understand why. But the compile errors are dissapearring after second compile (!).

THANK YOU!

[clavisound]

Although the FIRST attempt join was fine, all others attempts are failing. I still can't join with OTAA. I don't know if my gateway or my network or SlimLoRa is the problem.

ABP seems to work. I will check ADR.