The Wemos D1 Mini is a small versatile card based on the ESP8266 (ESP-12). It is found for less than €5 direct from china. Very easy to use (programming via USB cable, activation of the automatic Bootload mode …), there are many expansion cards (shields). Relay (250VAC / 10A or 30VDC / 10A), 64×48 pixel OLED display (SSD1306), LiPo battery charger (via micro-USB plug, charging in operation), micro-SD card reader , 7 to 24 VDC power supply, prototyping microplate, double socket, 2 x 15VDC driver, RGB light point based on the WS2812B controller. It is very easy to develop connected objects (IoT) with the Wemos D1 Mini using the Arduino IDE or ESP Easy and integrate them into a home automation software (Jeedom, Domoticz …) or Node-RED .
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