Serial (Pi4J :: Java Library (Core) 0.0.4 API)

All Known Implementing Classes:

SerialImpl
```
public interface Serial
```
This interface provides a set of functions for 'Serial' communication.

Before using the Pi4J library, you need to ensure that the Java VM in configured with access to the following system libraries:
- pi4j
- wiringPi
This library depends on the wiringPi native system library.
(developed by Gordon Henderson @ https://projects.drogon.net/)
Author:

Robert Savage (http://www.savagehomeautomation.com)

See Also:
#SerialFactory, #SerialDataEvent, #SerialDataListener, http://www.pi4j.com/

Field Summary

Fields
Modifier and Type Field and Description

static String DEFAULT_COM_PORT
The default hardware COM port provided via the Raspberry Pi GPIO header.

Fields
Modifier and Type	Field and Description
`static String`	`DEFAULT_COM_PORT` The default hardware COM port provided via the Raspberry Pi GPIO header.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addListener(SerialDataListener... listener)` Java consumer code can call this method to register itself as a listener for serial data events.
`int`	`availableBytes()` This method is called to determine if and how many bytes are available on the serial received data buffer.
`void`	`close()` This method is called to close a currently open open serial port.
`void`	`flush()` This method is called to immediately flush the serial data transmit buffer and force any pending data to be sent to the serial port immediately.
`boolean`	`isOpen()` This method is called to determine if the serial port is already open.
`int`	`open(String device, int baudRate)` This method is call to open a serial port for communication.
`char`	`read()` This method will read the next character available from the serial port receive buffer.
`void`	`removeListener(SerialDataListener... listener)` Java consumer code can call this method to unregister itself as a listener for serial data events.
`void`	`write(byte data)` This method is called to submit a single byte of data to the serial port transmit buffer.
`void`	`write(byte[] data)` This method is called to submit a byte array of data to the serial port transmit buffer.
`void`	`write(char data)` This method is called to submit a single character of data to the serial port transmit buffer.
`void`	`write(char[] data)` This method is called to submit a character array of data to the serial port transmit buffer.
`void`	`write(String data)` This method is called to submit a string of data to the serial port transmit buffer.
`void`	`write(String data, String... args)` This method is called to submit a string of formatted data to the serial port transmit buffer.
`void`	`writeln(String data)` This method is called to submit a string of data with trailing CR + LF characters to the serial port transmit buffer.
`void`	`writeln(String data, String... args)` This method is called to submit a string of formatted data with trailing CR + LF characters to the serial port transmit buffer.

- Field Detail
  - DEFAULT_COM_PORT
```
static final String DEFAULT_COM_PORT
```
    The default hardware COM port provided via the Raspberry Pi GPIO header.
    
    See Also:
    #serialOpen(String,int), Constant Field Values
- Method Detail
  - open
```
int open(String device,
       int baudRate)
```
    This method is call to open a serial port for communication.
    
    Parameters:
    device - The device address of the serial port to access. You can use constant 'DEFAULT_COM_PORT' if you wish to access the default serial port provided via the GPIO header.
    baudRate - The baud rate to use with the serial port.
    
    Returns:
    The return value is the file descriptor or -1 for any error.
    See Also:
    DEFAULT_COM_PORT
  - close
```
void close()
```
    This method is called to close a currently open open serial port.
  - isOpen
```
boolean isOpen()
```
    This method is called to determine if the serial port is already open.
    
    Returns:
    a value of 'true' is returned if the serial port is already open.
    See Also:
    open(String, int)
  - flush
```
void flush()
```
    This method is called to immediately flush the serial data transmit buffer and force any pending data to be sent to the serial port immediately.
  - read
```
char read()
```
    This method will read the next character available from the serial port receive buffer.
    
    NOTE: If a serial data listener has been implemented and registered with this class, then this method should not be called directly. A background thread will be running to collect received data from the serial port receive buffer and the received data will be available on via the event.
    
    Returns:
    next available character in the serial data buffer
  - write
```
void write(char data)
```
    This method is called to submit a single character of data to the serial port transmit buffer.
    
    Parameters:
    data - A single character to be transmitted.
  - write
```
void write(char[] data)
```
    This method is called to submit a character array of data to the serial port transmit buffer.
    
    Parameters:
    data - A character array of data to be transmitted.
  - write
```
void write(byte data)
```
    This method is called to submit a single byte of data to the serial port transmit buffer.
    
    Parameters:
    data - A single byte to be transmitted.
  - write
```
void write(byte[] data)
```
    This method is called to submit a byte array of data to the serial port transmit buffer.
    
    Parameters:
    data - A byte array of data to be transmitted.
  - write
```
void write(String data)
```
    This method is called to submit a string of data to the serial port transmit buffer.
    
    Parameters:
    data - A string of data to be transmitted.
  - writeln
```
void writeln(String data)
```
    This method is called to submit a string of data with trailing CR + LF characters to the serial port transmit buffer.
    
    Parameters:
    data - A string of data to be transmitted.
  - write
```
void write(String data,
         String... args)
```
    This method is called to submit a string of formatted data to the serial port transmit buffer.
    
    Parameters:
    data - A string of formatted data to be transmitted.
    args - A series of arguments that can be included for the format string variable replacements.
  - writeln
```
void writeln(String data,
           String... args)
```
    This method is called to submit a string of formatted data with trailing CR + LF characters to the serial port transmit buffer.
    
    Parameters:
    data - A string of formatted data to be transmitted.
    args - A series of arguments that can be included for the format string variable replacements.
  - availableBytes
```
int availableBytes()
```
    This method is called to determine if and how many bytes are available on the serial received data buffer.
    
    Returns:
    The number of available bytes pending in the serial received buffer is returned.
  - addListener
```
void addListener(SerialDataListener... listener)
```
    Java consumer code can call this method to register itself as a listener for serial data events.
    
    Parameters:
    listener - A class instance that implements the SerialListener interface.
    See Also:
    #SerialListener, #SerialDataEvent
  - removeListener
```
void removeListener(SerialDataListener... listener)
```
    Java consumer code can call this method to unregister itself as a listener for serial data events.
    
    Parameters:
    listener - A class instance that implements the SerialListener interface.
    See Also:
    #SerialListener, #SerialDataEvent

Interface Serial

Field Summary

Method Summary

Field Detail

DEFAULT_COM_PORT

Method Detail

open

close

isOpen

flush

read

write

write

write

write

write

writeln

write

writeln

availableBytes

addListener

removeListener