modbuspp/example.cpp at master · gwkim9444/modbuspp · GitHub

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//
// Created by Fanzhe on 5/29/2017.
//

#include "modbus.h"


int main(int argc, char **argv)
{
    // create a modbus object
    modbus mb = modbus("127.0.0.1", 502);


    // set slave id
    mb.modbus_set_slave_id(1);

    // connect with the server
    mb.modbus_connect();

    // read coil                        function 0x01
    bool read_coil;
    mb.modbus_read_coils(0, 1, &read_coil);


    // read input bits(discrete input)  function 0x02
    bool read_bits;
    mb.modbus_read_input_bits(0, 1, &read_bits);


    // read holding registers           function 0x03
    uint16_t read_holding_regs[1];
    mb.modbus_read_holding_registers(0, 1, read_holding_regs);


    // read input registers             function 0x04
    uint16_t read_input_regs[1];
    mb.modbus_read_input_registers(0, 1, read_input_regs);


    // write single coil                function 0x05
    mb.modbus_write_coil(0, true);


    // write single reg                 function 0x06
    mb.modbus_write_register(0, 123);


    // write multiple coils             function 0x0F
    bool write_cols[4] = {true, true, true, true};
    mb.modbus_write_coils(0,4,write_cols);


    // write multiple regs              function 0x10
    uint16_t write_regs[4] = {123, 123, 123};
    mb.modbus_write_registers(0, 4, write_regs);


    // close connection and free the memory
    mb.modbus_close();
    delete(&mb);
    return 0;
}