modbus_connect3
Establish a modbus connection
Usage
int modbus_connect(modbus_t *ctx);
Overview
The modbus_connect() function shall establish a connection to a Modbus server, a network or a bus using the context information of libmodbus context given in argument.
Return value
The 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.
Examples
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;
}
Releases
6 releases since Debian 7 (Wheezy); the text changed 5 times.