The WeMos D1 is a board based on the ESP8266-12E WiFi Module and that has an Arduino Layout. It is compatible with Arduino and NodeMCU.
- Microcontroller: ESP-8266EX
- Clock Speed 80MHz/160MHz
- Flash: 4M bytes
- Operating Voltage: 3.3V
- 11 Digital I/O pins
- 1 Analog Input pin
- Arduino Compatible, you can use it on Arduino IDE.
- OTA — Wireless Upload (Program)
- On board switching power supply — Max 24V input, 5V 1A output