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en:arduino:language:serial_write

Serial

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)

Arduino Mega also supports: Serial1, Serial2, Serial3 (in place of Serial)

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

  • begin()
  • end()
  • available()
  • read()
  • peek()
  • parseInt()
  • flush()
  • print()
  • println()
  • write()
  • SerialEvent()
本页面的其他翻译:
en/arduino/language/serial_write.txt · 最后更改: 2016/12/25 22:15 (外部编辑)