Arduino with ethernet shield direct connect to openhab without NFR

[MarkV]

Is it possible to control / read sensors connected on a arduino directly through ethernet?

For example arduino Mega with ethernet shield en different sensors connectod on digital and analog i/o pins.
And can someone make a example or basic program for this???

[hek]

No, but nothing stops you from emulating the serial protocol over ethernet (like the gateway communicates). This way you could at least reuse the controller code.

[daulagari]

Depending on what gateway you use, another solution could be to implement an MQTT client on Arduino, see http://knolleary.net/arduino-client-for-mqtt/