- 100% Brand New- Uses CH340G instead of CP2102

- NodeMCU has built-in USB-TTL serial with super reliable industrial strength CH340G- CH340G provides superior stability on all supported platforms- 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- Logical current: 0mA-36mA- Transfer rate: 110-460800bps- Support UART / GPIO data communication interface- Support Smart Link Smart Networking

- Working temperature: -40 Cel. ~ + 125 Cel.- Drive Type: Dual high-power H-bridge driver- ESP8266 has IO Pin- Don't need to download resetting

- A great set of tools to develop ESP8266- Flash size: 4 MByte