begin()

Description

Sets the data rate in bits per second (baud) for serial data transmission. For communicating with the computer, use one of these rates: 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, or 115200. You can, however, specify other rates – for example, to communicate over pins 0 and 1 with a component that requires a particular baud rate. The maximum baud rate supported by 86Duino is 6000000 (6Mbps).

An optional second argument configures the data, parity, and stop bits. The default is 8 data bits, no parity, one stop bit.

And an optional third argument selects the full-duplex and half-duplex modes. The default is the full-duplex mode.

Syntax

All boards:

Serial.begin(speed)
Serial1.begin(speed)
Serial.begin(speed, config)
Serial1.begin(speed, config)

Serial1.begin(speed, mode)
Serial1.begin(speed, config, mode)


86Duino One specific:

Serial2.begin(speed)
Serial3.begin(speed)
Serial485.begin(speed)
Serial2.begin(speed, config)
Serial3.begin(speed, config)
Serial485.begin(speed, config)

Serial2.begin(speed, mode)
Serial3.begin(speed, mode)
Serial2.begin(speed, config, mode)
Serial3.begin(speed, config, mode)


86Duino EduCake specific:

Serial2.begin(speed)
Serial3.begin(speed)
Serial232.begin(speed)
Serial2.begin(speed, config)
Serial3.begin(speed, config)
Serial232.begin(speed, config)

Serial2.begin(speed, mode)
Serial3.begin(speed, mode)
Serial2.begin(speed, config, mode)
Serial3.begin(speed, config, mode)


Parameters

speed: in bits per second (baud) – long. Valid values are :

－50
－300
－600
－1200
－2400
－4800
－9600
－14400
－19200
－28800
－38400
－57600
－115200
－125000
－150000
－200000
－250000
－300000
－500000
－750000
－1000000
－1500000
－2000000
－3000000
－6000000

config: sets data, parity, and stop bits. Valid values are :

－SERIAL_5N1
－SERIAL_6N1
－SERIAL_7N1
－SERIAL_8N1 (the default)
－SERIAL_5N2
－SERIAL_6N2
－SERIAL_7N2
－SERIAL_8N2
－SERIAL_5E1
－SERIAL_6E1
－SERIAL_7E1
－SERIAL_8E1
－SERIAL_5E2
－SERIAL_6E2
－SERIAL_7E2
－SERIAL_8E2
－SERIAL_5O1
－SERIAL_6O1
－SERIAL_7O1
－SERIAL_8O1
－SERIAL_5O2
－SERIAL_6O2
－SERIAL_7O2
－SERIAL_8O2

mode: sets the full-duplex and half-duplex modes. Valid values are :

－COM_FullDuplex (the default)
－COM_HalfDuplex

Returns

nothing

Example

void setup() {
    Serial1.begin(9600); // opens serial port, sets data rate to 9600 bps
}

void loop() {}

86Duino One/EduCake example:

// Using Serial1, Serial2, Serial3 with different baud rates:

void setup(){
  Serial1.begin(38400);
  Serial2.begin(19200);
  Serial3.begin(4800);

  Serial1.println("Hello Serial 1");
  Serial2.println("Hello Serial 2");
  Serial3.println("Hello Serial 3");
}

void loop() {}

See also

－ Serial
－ available()
－ end()
－ find()
－ findUntil()
－ flush()
－ parseFloat()
－ parseInt()
－ peek()
－ print()
－ println()
－ read()
－ readBytes()
－ readBytesUntil()
－ setTimeout()
－ write()
－ serialEvent()

Language Reference Home

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.