write()
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
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 length of the buffer
Returns
byte: write()
will return the number of bytes written, though reading that number is optional
Example
void setup(){ Serial.begin(9600); } void loop(){ Serial.write(45); // send a byte with the value 45 int bytesSent = Serial.write(“hello”); // send the string “hello” and // return the length of the string. }
See also
- Serial
- available()
- begin()
- end()
- find()
- findUntil()
- flush()
- parseFloat()
- parseInt()
- peek()
- print()
- println()
- read()
- readBytes()
- readBytesUntil()
- setTimeout()
- serialEvent()
The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.