Once you're talking about "calibrate its parameter": If this device can be accessed locally thru a web page, then you need to port-forward a port (eg 8081) on the router' WAN port to your device' local LAN address, port 80. CHeck your router' manual for details about "port forwarding".
You'll also need to know your router' public IP address, and DDNS (Dynamic DNS) service can help you with that. Most modern routers support these services.