ModbusMaster.begin()

[Modbus]

Description

Initialize the ModbusMaster object and specify it as Serial class or IPAddress class.

Syntax

bus1.begin(mode, serial)
bus2.begin(mode, modbus_server_ip)

Parameters

• bus1/bus2: ModbusMaster object.
• mode: Specify the communication mode of the ModbusMaster object, which is coded MODBUS_RTU, MODBUS_ASCII, or MODBUS_TCP.
• serial: Specify the Serial class as the transmission channel.
• modbus_server_ip: Specify the IPAddress class as the transport channel.

Returns

bool: return true if successful, return false if not.

Example

#include <Ethernet.h>
#include <Modbus86.h>
 
ModbusMaster bus1;
ModbusMaster bus2;
 
IPAddress SlaveIP(192,168,3,59);
 
void setup()
{
    Serial1.begin(115200);
    bus1.begin(MODBUS_RTU, Serial1);
    // bus1.begin(MODBUS_ASCII, Serial1);
     
    Ethernet.begin();
    bus2.begin(MODBUS_TCP, SlaveIP);    
}
 
void loop() {}

See Also

• ModbusMasterNode::attach()
• ModbusSlave::begin()

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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.