Problem with ttn-otaa.ino

[martinmmi]

Hello, i get in plattform.io the error, that the do_send is not declared. What can it be?

I think, the problem is the same us from 2020 in the thread:

https://github.com/matthijskooijman/arduino-lmic/issues/268

[slavendam]

Try to move declaration of do_send() function before that call (before line 168).