802.11 b / g n wireless standards • STA / AP modes support • TCP / IP protocol stack, One socket • supports standard TCP / UDP server and client • supports serial port baud rate configuration: 1200 / 2400 / 4800 / 9600 / 19200 / 38400 / 57600 / 74800 / 115200 bps • supports serial data bits: 5 / 6 / 7 / 8 bits • supports serial stop bits: 1/2 bit • pin-compatible with Arduino Uno, Mega • Arduino pinout: 2/3/4/5/6/7/8/9/10/11/12/13 • ESP8266 GPIO pinout: 0/2/4/5/9/10/12/13/14/15/16 / ADC / EN / * UART TX / UART RX • KEY button: modes configuration • dual-ports DIP switches: switching Arduino and ESP8266 • WiFi operation current: continuous transmission operation: ˜70 mA (200 mA max), idle mode: < 200 uA • serial WiFi transmission rate: 110-460800 bps • operating humidity: 10%-90% non-condensing • operating temperature: -10 to 70 °C • weight: ± 20 g (0.7 oz),
