Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help 
modbus_connect()					      modbus_connect()

Name
       modbus_connect -	establish a Modbus connection

Synopsis
       int modbus_connect(modbus_t *ctx);

Description
       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.

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 <modbus_close.md>

							      modbus_connect()

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=modbus_connect&sektion=3&manpath=FreeBSD+Ports+15.0>

home | help