ESP8266 ESP-12 USB WeMos D1 Mini WIFI Development Board D1 Mini NodeMCU IOT Board Based On ESP-8266EX 11 Digital Pins 3.3V
This is D1 mini, it is a mini WIFI board based on ESP-8266EX. 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0) a Micro USB connection 1 analog input(3.3V max input)