modbus_strerror - return the error message

       The libmodbus documentation was written by Stéphane Raimbault <stephane.raimbault@gmail.com>

libmodbus v3.1.6                                   12/09/2019                                 MODBUS_STRERROR(3)

       The modbus_strerror() function shall return a pointer to an error message string corresponding to the
       error number specified by the errnum argument. As libmodbus defines additional error numbers over and
       above those defined by the operating system, applications should use modbus_strerror() in preference to
       the standard strerror() function.

       No errors are defined.

DisplayanerrormessagewhenaModbusconnectioncannotbeestablished.

           if (modbus_connect(ctx) == -1) {
               fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
               abort();
           }

       modbus_strerror - return the error message

       The modbus_strerror() function shall return a pointer to an error message string.

       linkmb:libmodbus

constchar*modbus_strerror(interrnum);