The ESP-12S NodeMCU-8266 development board is a core development board designed for ESP8266 modules. The development board continues the classic design of the NodeMCU 1.0 and leads all I/O to the pins on both sides. Developers can connect peripherals according to their own needs. When using breadboard for development and debugging, the standard row needles on both sides can make the operation easier and more convenient. Integration of rich data, including AT instructions, SDK secondary development, UART interface supports firmware burning, simple and fast! At the same time, the USB interface and the official burning tool can also realize firmware burning.