ESP-12
From Federal Burro of Information
a esp8266 variant
serial 74880 serial to watch arduino OS boot.
11500 to upload new iamge
"gpio" then "reset" to go into programming mode.
in built level shifts for serial USB to TTL adapters 5v -> 3.3v.
https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/pinouts