modbus_set_debug - set debug flag of the context

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

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

       The modbus_set_debug() function shall set the debug flag of the modbus_t context by using the argument
       flag. By default, the boolean flag is set to FALSE. When the flag value is set to TRUE, many verbose
       messages are displayed on stdout and stderr. For example, this flag is useful to display the bytes of the
       Modbus messages.

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       modbus_set_debug - set debug flag of the context

       The function shall return 0 if successful. Otherwise it shall return -1 and set errno.

intmodbus_set_debug(modbus_t*ctx,intflag);