Looks for the next valid integer in the incoming serial. The function terminates if it times out (see Serial.setTimeout()).
Serial.parseInt() inherits from the Stream utility class.
Parsing stops when no characters have been read for a configurable time-out value, or a non-digit is read;
If no valid digits were read when the time-out (see Serial.setTimeout()) occurs, 0 is returned;
Serial: serial port object. See the list of available serial ports for each board on the Serial main page.
lookahead: the mode used to look ahead in the stream for an integer. Allowed data types:
SKIP_ALL: all characters other than digits or a minus sign are ignored when scanning the stream for an integer. This is the default mode.
SKIP_NONE: Nothing is skipped, and the stream is not touched unless the first waiting character is valid.
SKIP_WHITESPACE: Only tabs, spaces, line feeds, and carriage returns are skipped.
ignore: used to skip the indicated char in the search. Used for example to skip thousands divider. Allowed data types:
The next valid integer. Data type: