Adafruit CC3000 WiFi @ The Adafruit Learning System. Add the Internet to your microcontroller project!
The CC3000 WiFi module from Texas Instruments is a small silver package which finally brings easy-to-use, affordable WiFi functionality to your Arduino projects.
It uses SPI for communication (not UART!) so you can push data as fast as you want or as slow as you want. It has a proper interrupt system with IRQ pin so you can have asynchronous connections. It supports 802.11b/g, open/WEP/WPA/WPA2 security, TKIP & AES. A built in TCP/IP stack with a “BSD socket” interface supports TCP and UDP in both client and server mode, with up to 4 concurrent socket connections.
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