This is a fairly popular Arduino compatible module. Offers 802.11 b/g/n wireless communication. The Wemos ESP8266 OLED combines the functionality of an OLED screen and the connectivity of ESP8266 modules. It also has a nicroUSB connector both for programming with the Arduino IDE and for power supply
Chip Wifi ESP-12 / ESP8266 - 802.11 b/g/n
OLED screen 128x64 pixels
MicroUSB connection (programming and power supply)
Compatible with the Arduino IDE