Uses CH340G instead of CP2102.
NodeMCU has built-in USB-TTL serial with super reliable industrial strength CH340G for 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
Transfer rate: 110-460800bps
Support UART / GPIO data communication interface
Remote firmware upgrade (OTA)
Support Smart Link Smart Networking
Working temperature: -40 ? ~ + 125 ?
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: 4MByte