Open Tools→Board:xxx→Boards Manager and install esp8266 by ESP8266. ESP8266 has I/O Pin. A great set of tools to develop ESP8266. D1 mini, it is a mini NodeMcu Lua WiFi board based on ESP-8266EX. 1x Mini NodeMCU Lua Wifi Wireless Module.
NodeMCU Lua ESP8266 ESP-12 WeMos D1 Mini WIFI 4M Bytes Development Board Module
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Open Tools→Board:xxx→Boards Manager and install esp8266 by ESP8266. This is D1 mini, it is a mini WIFI board based on ESP-8266EX. 1 analog input(3.3V
NodeMCU Lua ESP8266 ESP-12 WeMos D1 Mini WIFI 4M Bytes Development Board Module
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1~20PCS ESP-12 ESP8266 WeMos D1 Mini WIFI 4M Bytes Development Board NodeMCU Lua
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