Descriptions: The NodeMcu Development Kit based on ESP8266, CP2102 integates GPIO, PWM, IIC, 1-Wire and ADC all in one board. Power your developement in the fastest way combinating with NodeMcu Firmware Build on ESP8266 sdk Build on CP2102 USB to TTL Lua core based on eLua project cjson based on lua-cjson File system based on spiffs Easy to access wireless router Based on Lua 5.1.4 (without debug, os module.) Event-Drive programming preferred. Build-in json, file, timer, pwm, i2c, spi, 1-wire, net, mqtt, coap, gpio, wifi, adc, uart and system api. GPIO pin re-mapped, use the index to access gpio, i2c, pwm. Both Integer version(less memory usage) and Float version(Default) firmware provided. Features: Now supports IDE 1 with ESP8266 Uses WiFi Module ESP-12E. USB Power 5v and program via micro USB port CP2102 USB TTL Module Fits on a standard breadboard and gives access to a row of holes either side 10 GPIO, every GPIO can be PWM, I2C or 1-wire Headers 2 x 2.54mm 15-pin header with access to GPIOs, SPI, UART, ADC, and power pins Misc Reset and Flash buttons USB-TTL included, plug n play FCC CERTIFIED WI-FI module, PCB antenna Can see the Nodemcu LUA development environment as an alternative ESP8266 Size: 4.8x2.5x1cm/1.89x0.98x0.39inch Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 Pc x WiFi Development Board