http://hackaday.com/2015/03/18/how-to-directly-program-an-inexpensive-esp8266-wifi-module/

http://www.instructables.com/id/Getting-Started-with-the-ESP8266-ESP-12/

http://www.danielcasner.org/guidelines-for-writing-code-for-the-esp8266/

https://www.baldengineer.com/four-esp8266-gotchas.html

http://tuanpm.net/rock-solid-esp8266-wifi-mqtt-restful-client-for-arduino/

http://tuanpm.net/native-mqtt-client-library-for-esp8266/

http://www.penninkhof.com/2015/03/esp8266-open-sdk/

[[http://frightanic.com/iot/comparison-of-esp8266-nodemcu-development-boards/|Board comparison]]

====== ESP-12E ======

https://smartarduino.gitbooks.io/user-manual-for-esp-12e-devkit/content/schematics_for_esp-12e_devkit.html

https://raw.githubusercontent.com/nodemcu/nodemcu-devkit/master/Documents/NODEMCU_DEVKIT_SCH.png

====== NodeMCU ======

http://nodemcu.com/index_en.html

https://github.com/nodemcu/nodemcu-devkit

====== Toolchain ======

https://github.com/pfalcon/esp-open-sdk

https://github.com/esp8266/esp8266-wiki

https://github.com/esp8266/source-code-examples

====== Serial bridge ======

https://github.com/jeelabs/esp-link

https://wiki.openwrt.org/doc/howto/esp8266-serial-bridge

https://github.com/dparnell/esp8266-ser2net

====== Other projects ======

https://groups.google.com/forum/#!topic/webiopi/lUvtfxHNbMk

https://github.com/Spritetm/esphttpd

http://users.ece.utexas.edu/~valvano/arm/esp8266.c

====== AT commands ======
http://esp8266at.com/index.html#sect_features

====== Battery-powered ======
https://openhomeautomation.net/esp8266-battery/

====== Other WiFi chips ======

http://www.seeedstudio.com/depot/EMW3165-CortexM4-based-WiFi-SoC-Module-p-2488.html

http://hackaday.com/2015/07/13/new-part-day-the-esp8266-killer/

http://hackaday.com/2016/04/05/makerville-knit-industrial-strength-wifi-breakout/