Silicon labs bluegiga rf modules silicon labs bluegiga wf121 a v2 a wi fi module providing fully integrated 24ghz 80211 bgn radio tcpip stack and a 32 bit micro controller mcu platform for embedded applications requiring simple low cost and low power wireless ip connectivity it also provides flexible peripheral interfaces such as spi i2c adc gpio bluetooth co existence and timers to connect various peripheral interfaces directly to the wf121 wi fi module silicon labs bluegiga w