Serial.parseFloat() returns the first valid floating point number from the Serial buffer. parseFloat() is terminated by the first character that is not a floating point number. The function terminates if it times out (see Serial.setTimeout()).
Serial.parseFloat() inherits from the Stream utility class.
- 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 a floating point number. Allowed data types: LookaheadMode. Allowed lookahead values:
- SKIP_ALL: all characters other than a minus sign, decimal point, or digits are ignored when scanning the stream for a floating point number. 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: char
- Data type: float.
- Compile and upload the above code to Arduino
- Open Serial Monitor and select Newline option
- Type -127.45 on Serial Monitor and click Send button:
- The result on Serial Monitor:
※ NOTES AND WARNINGS:
Serial functions are not only used for the communication between an Arduino board and Serial Monitor of Arduino IDE but also used for the communication between:
- An Arduino board and other Arduino board
- An Arduino board and other sensors/devices
- An Arduino board and computer (any Serial software on computer)