WeMos D1 - ESP8266 based on Arduino®

This WeMos D1 is a development board based on ESP8266 with Arduino UNO board format. This board is compatible with the Arduino IDE and with NodeMCU. The D1 also features an on-board switching power supply which allows you to power the board from a power from a power supply up to 24V, 11 GPIO pins (can be used as input/output/PWM/I2C, except D0), and 1 analog input.

Features:

• 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported (except for D0)
• 1 analog input (3.2V max input)
• Micro USB connection
• Power jack, 9V power input.
• Compatible with Arduino and NodeMCU

Specification:

• Microcontroller: ESP-8266EX
• USB-Serial converter: CH340
• Operating voltage: 3.3V
• Number of digital I/O pins: 11
• Number of analog input: 1 (max. 3.2V)
• Clock frequency: 80MHz/160MHz
• Flash memory: 4MB
• Dimensions: 68.6 mm x 53.4 mm (L x W)
• Weight: 25g