Features :

• WiFi using industrial-grade ESP8266 chips, modules for ESP13 with metal shield , strong anti-interference ability;
• Standard pin compatible with the Arduino Uno R3 , Mega 2560 , such as main control board, a voltage conversion chip is used to connect with the Arduino Uno , 3.3V and 5V compatible
• A serial port using dual dial the code switch to control, makes the extension board can separate as Ar-duin Uno extended board is used, can also be used as ESP8266 extension plate
• Real serial WiFi, the Ar-duin program without any configuration
• WiFi based on the Web Server configuration parameters and serial port
• Can be used as an independent ESP8266 development board, download the official firmware the AT command, Node MCU open-source firmware, etc;
• Can be used as an independent Arduino Uno expansion board, pins all leads.