Adafruit HUZZAH CC3000 WiFi Breakout (Retired)
The Adafruit HUZZAH CC3000 WiFi Breakout that hits that sweet spot of usability, price and capability. 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. TCP and UDP in both client and server mode, up to 4 concurrent sockets. It does not support “AP” mode, it can connect to an access point but it cannot be an access point.
The little silver modules are wrapped in a tidy breakout board. It has an onboard 3.3V regulator that can handle the 350mA peak current, and a level shifter to allow 3 or 5V logic level. The antenna layout is identical to TI's suggested layout and the same components were used, trace arrangement, and antenna so the board maintains its FCC emitter compliance (you'll still need to perform FCC validation for a finished product, but the WiFi part is taken care of). Even though it's got an onboard antenna we were pretty surprised at the range, as good as a smartphone's.
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Adafruit HUZZAH CC3000 WiFi Breakout
Each order comes with one fully assembled and tested breakout and a small stick of header you can use to solder in and plug into a breadboard.
Technical Specifications of Adafruit HUZZAH CC3000 WiFi Breakout
Dimensions: 26.22mm / 1.03″ x 40.45mm / 1.59″ x 2.95mm / 0.11″