Specifications, schematics: http://www.mikrocontroller.net/attachment/231858/0A-ESP8266_Specifications_v4.pdf

  Wi07c - ElectroDragon\\ 
  Seed Studio WiFi Serial Transceiver Module - Wiki\\ 
  https://nurdspace.nl/ESP8266
  wireless:esp8266    [Boxtec Playground]
  Range tests >300m, 4km with dish UBIQUII M2 dish\\ 
 www.element14.com/community/people/Problemchild/blog/2014/09/29/esp8266-wifi-rangedistance-tests
  Video with links
  Schematics ESP8266 WiFi Serial Module Costs Just $5\\ 
  www.youtube.com/watch?v=9QZkCQSHnko
  http://scargill.wordpress.com/2014/09/27/investigating-the-esp8266-serial-killing
  A very good tutorial about upload to thingsspeak.com and firmware upload
  http://www.instructables.com/id/ESP8266-Wifi-Temperature-Logger/?ALLSTEPS
  GCC toolchain, 10bit ADC(not useful when RF running) www.github.com/esp8266/esp8266-wiki/wiki
  Cloud updating your Wi07C ESP8266 www.blog.electrodragon.com/cloud-updating-your-wi07c-esp8266-now//
  Interfacing with Teensy  http://kaspars.net/blog/electronics/esp8266-teensy-arduino