Adafruit esp8266 smt module breakout board esp 12 adafruit 2491 the adafruit esp8266 smt module breakout board uses the internet of things chip of choice the esp8266 running at 80mhz with 4mbytes of flash memory 9 x gpio pins and 1 x analogue input adafruit have produced this breadboard friendly breakout with an on board antenna so you can get to know this very successful chip it comes pre programmed with nodemcu lua firmware which lets you perform complex network tasks in a small nu