ModbusSerial

Modbus over serial line Class. More...

Inherits Modbus.

Public Member Functions
	ModbusSerial (Stream &port, byte slaveId, int txenPin=-1)
	Constructor. More...
void	config (unsigned long baud)
	Configure ModbusSerial object. More...
void	task ()
	Task that performs all operations on MODBUS. More...
void	setSlaveId (byte slaveId)
	Change the value of slave identifier. More...
byte	getSlaveId ()
	Return slave identifier.

Static Public Attributes
static const byte	BroadcastAddress = 0
	Broadcast address.

Detailed Description

Modbus over serial line Class.

Constructor & Destructor Documentation

ModbusSerial()

ModbusSerial::ModbusSerial	(	Stream &	port,
		byte	slaveId,
		int	txenPin = -1
	)

Constructor.

Parameters

port	serial port to use
txenPin	if an RS485 circuit is used, this corresponds to the pin number connected to the transmit enable (DE) and receive disable (/RE) pin. -1 if not used.

Member Function Documentation

config()

void ModbusSerial::config

(

unsigned long

baud

)

Configure ModbusSerial object.

configures txenPin on output if necessary and calculates the times of the RTU frame.

Warning

the begin() function of the serial port passed to the constructor must be called BEFORE calling this function.

Parameters

baud	baudrate in accordance with that used by the serial port

setSlaveId()

void ModbusSerial::setSlaveId

(

byte

slaveId

)

Change the value of slave identifier.

Parameters

slaveId

identifier 1-247

task()

void ModbusSerial::task

(

)

Task that performs all operations on MODBUS.

Call once inside loop(), all magic here !