arduino Serial Communication
Syntax
Serial.begin(speed)// Opens the serial port on the given baud rateSerial.begin(speed, config)Serial[1-3].begin(speed)// Arduino Mega only! When writing 1-3 it means you can choose between the numbers 1 to 3 when choosing the serial port.Serial[1-3].begin(speed, config)// Arduino Mega only! When writing 1-3 it means you can choose between the numbers 1 to 3 when choosing the serial port.Serial.peek()// Reads the next byte of input without removing it from the bufferSerial.available()// Gets the number of bytes in the bufferSerial.print(text)// Writes text to the serial portSerial.println(text)// Same asSerial.print()but with a trailing newline
Parameters
| Parameter | Details |
|---|---|
| Speed | The rate of the serial port (usually 9600) |
| Text | The text to write to the serial port (any data type) |
| Data bits | Number of data bits in a packet (from 5 - 8), default is 8 |
| Parity | Parity options for error detection: none (default), even, odd |
| Stop bits | Number of stop bits in a packet: one (default), two |
Remarks
The Arduino Mega has four serial ports which there can be choosed from. They are accesed in the following way
Serial.begin(9600);
Serial1.begin(38400);
Serial2.begin(19200);
Serial3.begin(4800);
The serial port on an Arduino can be set with additional parameters. The config parameter sets data bits, parity, and stop bits. For example:
8 data bits, even parity and 1 stop bit would be - SERIAL_8E1
6 data bits, odd parity and 2 stop bit would be - SERIAL_6O2
7 data bits, no parity and 1 stop bit would be - SERIAL_7N1
