D1 mini – Mini NodeMcu 4M bytes Lua WIFI Internet of Things development board based ESP8266 by WeMos 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0) 1 analog input(3.3V max input) a Micro USB connection Package Included: 1×WeMos D1 mini 2×Long female pins 2×Short female pins 2×Normal pins