Description
Get the number of bytes (characters) available for reading from the serial port. This is data that’s already arrived and stored in the serial receive buffer (which holds 64 bytes).
Serial.available()
inherits from the Stream utility class.
Syntax
Serial.available()
Parameters
Serial
: serial port object. See the list of available serial ports for each board on the Serial main page.
Returns
The number of bytes available to read .