Even though it's got an onboard antenna we were pretty surprised at the range, as good as a smartphone's.Įach order comes with one fully assembled and tested shield, some male header for attaching it to an Arduino and a 2x3 female header that you can use to plug it into the ICSP port of a Mega. The antenna layout is identical to TI's suggested layout and uses the same components, 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). 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. There is also a microSD socket and a reset button. This little silver module is carefully wrapped into an Arduino shield. It does not support "AP" mode, it can connect to an access point but it cannot be an access point. TCP and UDP in both client and server mode, up to 4 concurrent sockets. A built in TCP/IP stack with a "BSD socket" interface. It supports 802.11b/g, open/WEP/WPA/WPA2 security, TKIP & AES. It has a proper interrupt system with IRQ pin so you can have asynchronous connections. It uses SPI for communication (not UART!) so you can push data as fast as you want or as slow as you want. The CC3000 hits that sweet spot of usability, price and capability. Either they were too slow, or too difficult to use, or required signing an NDA, or had limited functionality, or too expensive, or too large. For years we've seen all sorts of microcontroller-friendly WiFi modules but none of them were really up to par.
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