100% brand new and high qualityDescriptions: 100% Brand new and high quality. Features: WiFi uses industrial-grade chip ESP8266, the module is ESP-13 with a metal shield, strong anti-interference ability;The standard pins are compatible with the main control boards such as Uno and Mega-2560, and the UNO connection adopts a voltage conversion chip to make 3.3V and 5V compatible;The serial port is controlled by a two-way DIP switch, so that the expansion board can be used as an Uno expansion board alone or as an ESP8266 expansion board;The real serial port WiFi, the program does not need any configuration;Configure WiFi parameters and serial port parameters based on Web Server;It can be used as an independent ESP8266 development board to download official AT command firmware, NodeMCU open source firmware, etc.;It can be used as an independent Uno expansion board, and all the pins are led out. Specifications: Item: ESP8266 WiFi Web Sever Shield Development BoardSupport wireless 802.11 b/g/n standards; Support STA/AP two working modes;Built-in TCP/IP protocol stack, you can configure a socket;Support standard TCP/UDP Server and Client;Serial port baud rate support: 1200/2400/4800/9600/19200/38400/57600/74800/115200 bps;Serial port data bits: 5/6/7/8 bits;Serial port stop bit: 1/2 bit;Standard UNO and Mega- pin spacing;Lead out Pin 2/3/4/5/6/7/8/9/10/11/12/13; Lead ESP8266 GPIO 0/2/4/5/9/10/12/13/14/15/16/ADC/EN/UART TX/UART RX;RESET ;KEY button multiplexing configuration function;Two-position DIP switch realizes forArduino and ESP8266 serial port expansion switch;WiFi working current: continuous transmission: 70mA (200mA MAX), standby: Wireless transmission rate: 110-460800bps;Working temperature: -40125Module weight: about 20g Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes: 1 PC x ESP8266 WiFi Module Development Board