ESP8266 ESP-12 ESP12 WeMos D1 Mini Module - Kuongshun Electronic
Open Tools → Board: xxx → Boards Manager and install esp8266 by ESP8266. Before you use miniD1 boards, you need setup CH340g driver. This is D1 mini,
ESP8266 ESP-12 NodeMcu Lua WeMos D1 Mini WIFI CH340G Development Board Antenna
11 digital input / output pins, all pins with interrupt / PWM / I2C / support 1 line (except D0); 1 analog input(3.2V max input). Micro USB
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ESP8266 - Wikipedia