Serial.peek()
Returns the next byte (character) of incoming serial data without removing it from the internal serial buffer. That is, successive calls to peek() will return the same character, as will the next call to read(). peek() inherits from the Stream utility class.Serial.peek()
the first byte of incoming serial data available (or -1 if no data is available) - int
Corrections and documentation improvements are accepted via fork & pull-request on GitHub. Suggestions and feature requests are welcome to the Forum.
The text of the Z-Uno reference is based on Arduino Reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.