This Serial WiFi module is you best choice for you to connect your application to the internet. It is a complete ultra low power embedded TCP/IP solution. It is a standalone, embedded wireless 802.11b/g networking module. It incorporates a 2.4GHz radio, processor, TCP/IP stack, power management to let the users connecting to the internet with the serial port.
With the relative low price, this module suits for more IOT applications such as smart home, smart agricultures.