ModbusMasterNode.send()

[Modbus]

Description

Set the quotes to the private array writeData in the ModbusMasterNode class and stack the data automatically with beginTransmission and writeMultipleRegisters without parameters.

writeData is the contents of a Modbus packet using the Write function code.

Syntax

node1.send(value)

Parameters

• node1: ModbusMasterNode object.
• value: Fill in the writeData array with the value of the Modbus packet content to be sent, either uint8_t, uint16_t or uint32_t.

Example

#include <Arduino.h>
#include <Modbus86.h>
 
ModbusMaster bus1;
ModbusMasterNode node2;
 
uint8_t reg[2];
uint8_t result;
 
void setup()
{
    while(!Serial);
    bus1.begin(MODBUS_RTU,Serial1);
    node2.attach(16, bus1); 
 
    reg[0] = 0x1234;
    reg[1] = 0xabcd;
    node2.beginTransmission(5);
    node2.send(reg[0]);
    node2.send(reg[1]);
    result = node2.writeMultipleRegisters();
 
    if (result != MODBUS_SUCCESS) {
        Serial.print("ErrorCode: ");
        Serial.println(result);
    }
}
 
void loop() {}

See Also

• beginTransmission()
• writeMultipleRegisters()

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