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