The is a WiFi board based on an ESP-8266-12F -USB port. This WLAN board contains input / output pins and all pins have interrupt / pwm / I2C / 1-wire.Thanks to ultra-compact design, the NodeMcu with ESP8266-12F WLAN module can be easily stored in a decentralized manner.The wireless development board is 100% compatible and can be programmed in the for -IDE.A CH340 chip is on board for easy and convenient programming.This compact development board can be used for different applications and projects due to light weight and design.For example, it can measure air pressure, temperature and humidity with the module BME 280 via own web server via WLAN connection.Material:ABScolour:As ShownPackage Contents:5 x Mini NodeMCU WiFi BoardOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.