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MODBUS_RECEIVE(3)              Libmodbus Manual              MODBUS_RECEIVE(3)


NAME

       modbus_receive - receive a indication request


SYNOPSIS

       int modbus_receive(modbus_t *ctx, uint8_t *req);


DESCRIPTION

       The modbus_receive() function shall receive an indication request from
       the socket of the context ctx. This function is used by Modbus
       slave/server to receive and analyze indication request sent by the
       masters/clients.

       If you need to use another socket or file descriptor than the one
       defined in the context ctx, see the function modbus_set_socket(3).


RETURN VALUE

       The modbus_receive() function shall store the indication request in req
       and return the request length if sucessful. The returned request length
       can be zero if the indication request is ignored (eg. a query for
       another slave in RTU mode). Otherwise it shall return -1 and set errno.


SEE ALSO

       modbus_set_socket(3) modbus_reply(3)


AUTHORS

       The libmodbus documentation was written by Stephane Raimbault
       <stephane.raimbault@gmail.com[1]>


NOTES

        1. stephane.raimbault@gmail.com
           mailto:stephane.raimbault@gmail.com

libmodbus 3.1.0                   10/06/2013                 MODBUS_RECEIVE(3)

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