Adopt new (non-pre-used) CH340 original chip The USB interface is more secure Complete documentation Every piece of shipping board is rigorously tested (testing a board takes 2-5 minutes), strictly controlling quality NodeMCU has ESP-12 based serial WiFi integrated on board to provide GPIO, PWM, ADC, I2C and 1-WIRE resources at your finger tips built-in USB-TTL serial with super reliable industrial strength CH340 for superior stability on all supported platforms ESP8266 is a highly integrated chip designed for the needs of a new connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to offload all Wi-Fi networking functions from another application processor. ESP8266 has powerful on-board processing and storage capabilities that allow it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during run-time. Its high degree of on-chip integration allows for minimal external circuitry, and the entire solution, including front-end module, is designed to occupy minimal PCB area. Package Including: 4 x ESP8266 development board

DIY a smart car : If together with the motor or servo extension board, one can diy a smart robot, e.g., rc car, tank chassis. Smart hardwares easily, if you want to do some remote control projects, the cheap but useful NodeMCU board can help you. the embedded MCU and wifi functions let us be able to remotely control our hardwares. Its high degree of on-chip integration allows for minimal external circuitry, and the entire solution, including front-end module, is designed to occupy minimal PCB area. ESP8266 CH340 chip, power your development in the fastest way combinating with NodeMcu Firmware; It's a IOT unit with all available resources on board, support smart link and smart networking. ESP8266 has powerful on-board processing and storage capabilities that allow it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime.