This isn’t an ESP8266 shield, either: you can write code for the ESP module, connect the serial pins, and hit the program button. The basic functions of the Arduino IDE – pinMode, digitalRead ...

Arduino has a library for quickly and easily ... There are also much more advanced techniques for saving power on ESP8266-based boards; from boards that barely sip a single microamp while sleeping ...

For example, many enthusiasts pair the ESP8266 with an Arduino, but you can also use ... any sensor that you think could do with a Wi-Fi connection will be great to pair with one of these.