The new NodeMCU V3 is a fast leading edge low cost WiFi technology. Modern high level mature LUA based technology. It is an integrated unit with all available resources on board. It is super simple to complement your existing Arduino projects or any development board that has I/O pins available.
Modern Internet development tools such as Node.js can take advantage the NodeMCU with the built-in API to put your idea on the fast track immediately.
NodeMCU is built based on the mature ESP8266 technology to take advantage the abundant resources available on the web.
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.