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MODBUS_CONNECT

NAME

modbus_connect − establish a Modbus connection

SYNOPSIS

int modbus_connect(modbus_t *ctx);

DESCRIPTION

The modbus_connect() function shall etablish a connection to a Modbus server, a network or a bus using the context information of libmodbus context given in argument.

RETURN VALUE

The modbus_connect() function shall return 0 if successful. Otherwise it shall return −1 and set errno to one of the values defined by the system calls of the underlying platform.

EXAMPLE

modbus_t *ctx;

ctx = modbus_new_tcp("127.0.0.1", 502);
if (modbus_connect(ctx) == −1) {
fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
modbus_free(ctx);
return −1;
}

SEE ALSO

modbus_close(3)

AUTHORS

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

NOTES

1.

stephane DOT raimbault AT gmail DOT com

mailto:stephane DOT raimbault AT gmail DOT com

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