I have created a breakout board for the ESP8266_12.
3.3V Regulator
5V-3.3V logic conversion for Arduino
Breadboard friendly
Shipped with your choice of NodeMCU or Factory Firmware.
Comes with trusted example code in a zip file.
All Pins of the ESP are broken out.
https://www.kickstarter.com/projects/323660810/wifi-esp8266-iot
Thanks for looking!