Description
Writes binary data to the serial port. This data is sent as a byte or series of bytes; to send the characters representing the digits of a number use the print() function instead.
Syntax
Serial.write(val)
Serial.write(str)
Serial.write(buf, len)
Parameters
Serial
: serial port object. See the list of available serial ports for each board on the Serial main page.
val
: a value to send as a single byte
str
: a string to send as a series of bytes
buf
: an array to send as a series of bytes
len
: the number of bytes to be sent from the array
Returns
size_t
write()
will return the number of bytes written, though reading that number is optional