Arduino Function: SD.peek

Description

This function reads a byte from the file without advancing to the next one. After, the calls to peek() and read() return the same value. peek() inherits from the Stream utility class.

Syntax

file.peek()

Parameters

file: an instance of the File class (returned by SD.open())

Returns

 The next byte (or character), or -1 if none is available.


Based on the reference originally written by Arduino Community,  wiring.org.co and  arduino.cc