The ESP-8266EX-based Espressif development platform, which is almost compatible with the Arduino UNO pins, can also use some shield modules designed for the classic Arduino UNO.

Features:

• Arduino compatible, can be programmed via Arduino IDE
• 11 x input / output pins
• 1 x ADC pin (input range 0-3.3V)
• Support for OTA wireless upload
• Integrated 5V 1A switching power supply (maximum supply voltage 24V)
• In the Arduino IDE, it is necessary to add the WeMos D1 over the board manager
• Parameters: CPU 80 Mhz, speed 115200