The ESP8266 now has a barebones build environment focused on minimizing code size, as little as 131 bytes to boot up and blink an LED.

On the hardware side, this is exactly what you’d expect: an LED hanging off the digital pin of an ESP8266 module.

The Feather HUZZAH With ESP8266 WiFi development board is now available from $18.95 and offers a “new standard for portable micro controller cores” says Adafruit.