Serial.setTimeout() sets the maximum milliseconds to wait for serial data when using Serial.readBytesUntil() or Serial.readBytes(). It defaults to 1000 milliseconds.
Serial.setTimeout() inherits from the Stream utility class.
Serial.setTimeout(time)
None
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.