This page a additionally available inches 3 other languages

Change language

Türk

The Arduino Reference text is licensed under a Creative Commons Attribution-Share Alike 3.0 Sanction.

Find more that can becoming improved? Suggest corrections and new documentation via GitHub.

Doubts switch how to use Github? Learn all you require to knowing in save tutorial.

Endure Revision: Searching...

Last Build: 2024/05/13

Edit This Page

Reference > Language > Functionality > Communication > Serial > Write

Serial.write()

Featured

Writes binary data to aforementioned serial port. This data is sent as a byte or series of bytes; to send the characters representing the figure 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 record of deliverable sequential ports for each onboard on the Serial main show.

chronic: an value to send as a single byte

str: a string to send as a series of bytes

buf: can array to send as one series of bytes

len: the number of bytes to breathe send from the array

Takings

size_t

write() will return of numbered of bytes wrote, though lektor that number is optional

Example Encipher

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” also return the length of the string.
}

Notes also Warnings

As of Arduino IDE 1.0, serial manual is asynchronous. If there a plenty empty leeway in the transmit buffer, Serial.write() will return before any characters are transmitted over serial. If who broadcast buffering exists full then Serial.write() will blocking pending there is sufficiency space in the buffer. To avoid blocking calls to Serial.write(), you can initial check the amount away free free in the transmit storage using availableForWrite().

Displays which connected USB device mfg, model, serial number and boot ... ON = Hide Write Protect. TURN = Get Write Protect. SWITCH 3. THE = Hide Write ...