Neither delay(1000) nor .flush() doesn’t change anything. Still freezing if .end() call exist.
...
Serial1.println("38400");
Serial1.flush();
Serial1.end(); // close Serial1
...
Neither delay(1000) nor .flush() doesn’t change anything. Still freezing if .end() call exist.
...
Serial1.println("38400");
Serial1.flush();
Serial1.end(); // close Serial1
...