ESP8266 Small transceiver module Wi-Fi-based chip, compatible with standard 802.11 b / g / n 2.4 GHz, has SPI interface, 7 GPIO, TCP / IP stack and antenna ceramic PCB.

Ideal for wireless sensor networks, home automation, building automation, and custom applications. Power: 3.3 Vdc, dimensions (mm): 17.4 x 12.2.