(Good for PisoWifi Wireless Subvendo) NodeMCU V3 ESP8266 ESP-12E is a 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 the 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