In this post I will guide you through the jungle of available modules based on the ESP8266. This is not a complete list of available modules but a selection [...]
When you get started with wonderful world of the ESP8266 your first step might have been to play around with the AT command firmware. Then you might have [...]
After you setup your ESP8266 module as described here you can go on and write Arduino code that talks to the ESP8266 or even flash new firmware directly [...]