ModbusMasterNode.writeSingleCoil()

[Modbus]

Description

Send a packet command to the Slave node to write to a single Coil register.

Syntax

node1.writeSingleCoil(write_address, value)

Parameters

• node1: ModbusMasterNode Object.
• write_address: The address of the Coil register you want to write to.
• value: The value of the Coil register to write to, usually 0 or 1.

Returns

Int: If it succeeds, send back MODBUS_SUCCESS and vice versa, send back EXCEPTION_CODE.

Example

#include <Modbus86.h>
  
ModbusMaster bus1;
ModbusMasterNode node1;
 
uint8_t result;
uint8_t led = 1; 
     
void setup()
{
    while(!Serial);
    Serial1.begin(115200);
    bus1.begin(MODBUS_RTU, Serial1);
    node1.attach(16, bus1);
 
    result = node1.writeSingleCoil(5, led);
     
    if (result != MODBUS_SUCCESS) {
        Serial.print("writeSingleCoil => ErrorCode: ");
        Serial.println(result);
    }
}
  
void loop() {}

See Also

• writeMultipleCoils()

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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.