The NodeMCU is an open-source firmware and development kit that helps you to prototype your IoT product within a few Lua script lines. Formore details, please visitFeatureOpen-sourceInteractiveProgrammableLow costSimpleSmartWI-FI enabledArd--uino-like hardware IOAdvanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.Code like ard--uino, but interactively in Lua script.Nodejs style network APIEvent-driven API for network applications, which facilities developers writing code running on a 5mm*5mm sized MCU in Nodes style.Greatly speed up your IOT application developing process.Lowest cost WI-FISpecificationThe Development Kit based on ESP8266, integates GPIO, PWM, IIC, 1-Wire and ADC all in one board.Power your development in the fastest way combinating with NodeMCU Firmware!USB-TTL included, plug&play10 GPIO, every GPIO can be PWM, I2C, 1-wireFCC CERTIFIED WI-FI module(Coming soon)PCB antennaShipping ListNodeMCU: 1pcs