NAME

       modbus_set_byte_timeout - set timeout between bytes

SYNOPSIS

       void modbus_set_byte_timeout(modbus_t *ctx, uint32_t to_sec, uint32_t to_usec);

DESCRIPTION

       The modbus_set_byte_timeout() function shall set the timeout interval between two
       consecutive bytes of the same message. The timeout is an upper bound on the amount of time
       elapsed before select() returns, if the time elapsed is longer than the defined timeout,
       an ETIMEDOUT error will be raised by the function waiting for a response.

       The value of to_usec argument must be in the range 0 to 999999.

       If both to_sec and to_usec are zero, this timeout will not be used at all. In this case,
       modbus_set_response_timeout() governs the entire handling of the response, the full
       confirmation response must be received before expiration of the response timeout. When a
       byte timeout is set, the response timeout is only used to wait for until the first byte of
       the response.

RETURN VALUE

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

ERRORS

       EINVAL
           The argument ctx is NULL or to_usec is larger than 1000000.

SEE ALSO

       modbus_get_byte_timeout(3) modbus_get_response_timeout(3) modbus_set_response_timeout(3)

AUTHORS

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