ESP-12E module similar to ESP-12 module but with 6 extra GPIOs.
Micro USB port for power, programming and debugging
Headers: 2x 2.54mm 15-pin header with access to GPIOs, SPI, UART, ADC, and power pins
Misc: Reset and Flash buttons
Power: 5V via micro USB port
Dimensions: 49 x 24.5 x 13mm
The Development Kit based on ESP8266, integrates GPIO, PWM, IIC, 1-Wire, and ADC all in one board. Power your development in the fastest way combines with NodeMCU Firmware! R2 version had CP2102 USB-TTL instead, larger current support, slim board can put on breadboard.To flash R2, please see the update on Nodemcu wiki page.High quality USB cable is needed for this board to give high current supply, otherwise, your board won’t be recognized. The hardware documentation for the board can be found on nodemcu-devkit repo, including schematics and PCB layout designed with Altium Designer.Documentation:You can find the firmware source code and documentation on Github, as well as nodemcu-flasher, a Windows only tools to flash the firmware to a module. There’s also a separate tool called esptool that will let you flash nodemcu from Linux. In case you find the documentation is all over the place, you might want to checkout NodeMCU video tutorial below.Nodemcu.com is the official website for the project, but you’ll find more information on Github. You can also get answers to your questions on their BBS or ESP8622 community forums.Note: NO need to install the driver for CH341 (replaced by CP2102), and NO need to flash firmware when you get it and use on the first time. This is different from version R1.