Serial.availableForWrite()
Description
Get the number of bytes (characters) available for writing in the serial buffer without blocking the write operation.
Syntax
Serial.availableForWrite()
Parameter Values
- Serial: serial port object. See the list of available serial ports for each board on the Serial main page.
Return Values
- The number of bytes available to write.
Example Code
String myString = "Welcome to ArduinoGetStarted.com!\n";
void setup() {
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
int wlen = Serial.availableForWrite();
// prints the received data
Serial.print("TX buffer size: ");
Serial.println(wlen);
}
void loop() {
// check if Tx buffer is enough to write the string
if (Serial.availableForWrite() > myString.length()) {
// prints the string
Serial.print(myString);
delay(1000);
}
}
- The result on Serial Monitor:
8
Serial.println("Hello World!");
Message (Enter to send message to 'Arduino Uno' on 'COM15')
New Line
9600 baud
TX buffer size: 63
Welcome to ArduinoGetStarted.com!
Welcome to ArduinoGetStarted.com!
Welcome to ArduinoGetStarted.com!
Welcome to ArduinoGetStarted.com!
※ 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)* An Arduino board and other Arduino board
- An Arduino board and other sensors/devices
- An Arduino board and computer (any Serial software on computer)
See Also
- Language : Arduino - Serial
- Language : Serial.available()
- Language : Serial.begin()
- Language : Serial.end()
- Language : Serial.find()
- Language : Serial.findUntil()
- Language : Serial.flush()
- Language : Serial.getTimeout()
- Language : if(Serial)
- Language : Serial.parseFloat()
- Language : Serial.parseInt()
- Language : Serial.peek()
- Language : Serial.print()
- Language : Serial.println()
- Language : Serial.read()
- Language : Serial.readBytes()
- Language : Serial.readBytesUntil()
- Language : Serial.readString()
- Language : Serial.readStringUntil()
- Language : serialEvent()
- Language : Serial.setTimeout()
- Language : Serial.write()
※ ARDUINO BUY RECOMMENDATION
| Arduino UNO R3 | |
| Arduino Starter Kit |
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