I have to reproduce a signal (of 6 UART frames) which have 950 µs delay between each of the frames. Than, a delay of 37ms at the end of those frames.

Everything going right except the delay between each frame...The baud rate is at 9600.

Here is my current code :

  Serial1.write(sw_binary_train_1);
  delayMicroseconds(950);
  Serial1.write(sw_binary_train_2);
  delayMicroseconds(950);
  Serial1.write(sw_binary_train_3);
  delayMicroseconds(950);
  Serial1.write(sw_binary_train_4);
  delayMicroseconds(950);
  Serial1.write(sw_binary_train_5);
  delayMicroseconds(950);
  Serial1.write(sw_binary_train_6);
  delay(37);