Serial.read()

Descrição

Lê dados recebidos na porta serial.

A função Serial.read() é herdada da classe Stream.

Sintaxe

Serial.read()

Parâmetros

Retorna

O primeiro byte de dados recebidos disponível (ou -1 se não há dados disponíveis) - int.

Código de Exemplo

O código abaixo devolve um dado recebido na porta serial.

int incomingByte = 0; // variável para o dado recebido void setup() { Serial.begin(9600); // abre a porta serial, configura a taxa de transferência para 9600 bps } void loop() { // apenas responde quando dados são recebidos: if (Serial.available() > 0) { // lê do buffer o dado recebido: incomingByte = Serial.read(); // responde com o dado recebido: Serial.print("I received: "); Serial.println((char)incomingByte, DEC); } }
  • Type "HELLO" on Serial Monitor and click Send button:
Newbiely | Arduino IDE 2.3.8
──
File
Edit
Sketch
Tools
Help
Arduino Uno
Newbiely.ino
···
8 Serial.println("Hello World!");
Output
Serial Monitor
Message (Enter to send message to 'Arduino Uno' on 'COM15')
New Line
9600 baud
Ln 11, Col 1
Arduino Uno on COM15
2
  • The result on Serial Monitor:
Newbiely | Arduino IDE 2.3.8
──
File
Edit
Sketch
Tools
Help
Arduino Uno
Newbiely.ino
···
8 Serial.println("Hello World!");
Output
Serial Monitor
Message (Enter to send message to 'Arduino Uno' on 'COM15')
New Line
9600 baud
I received: H I received: E I received: L I received: L I received: O I received:
Ln 11, Col 1
Arduino Uno on COM15
2

※ Notas e Advertências:

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)

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