Modbus RTU over TCPIP protocol

Dear all.

I am using below modbus RTU library to communicate device using Modscan32

With this i could able to send and receive request over Modbus RTU format.

Now i would like to include RS485 to wifi converter. I would like to convert same data into TCP IP. mode
http://www.usriot.com/p/rs485-to-wifi-converters/.

Is there any library available which convert MODBUS RTU into MODBUS RTU over TCP-IP protocol.