NodeMCU V3 ESP8266

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NodeMCU V3 ESP8266 ESP-12E is WiFi development board that helps you to prototype your IoT product with few Lua script lines, or through Arduino IDE. The board is based on ESP8266 ESP-12E variant, unlike other ESP-12E, you won’t need to buy a separate breakout board, usb to serial adapter, or even solder it to a PCB to get started, you will only need a usb cable (Micro USB).
Features :
Communication interface voltage : 3.3V.
Antenna type : Built-in PCB antenna is available.
Wireless 802.11 b/g/n standard
WiFi at 2.4GHz, support WPA / WPA2 security mode
Support STA/AP/STA + AP three operating modes
Built-in TCP/IP protocol stack to support multiple TCP Client connections (5 MAX)
D0 ~ D8, SD1 ~ SD3 : used as GPIO, PWM, IIC, etc., port driver capability 15mA
AD0 : 1 channel ADC
Power input : 4.5V ~ 9V (10VMAX), USB-powered
Current : continuous transmission : 70mA (200mA MAX), Standby : <200uA
Transfer rate : 110-460800bps
Support UART / GPIO data communication interface
Remote firmware upgrade (OTA)
Flash size : 4MByte