Webduino Smart is a ground-breaking development board. Unlike Webduino Mark 1 and Webduino Fly, which need to combine with Arduino boards, Webduino Smart can function with the Internet and WebSocket independantly. It will be a path to lead an efficient and effective development of IoT. it is the first product of BPI team and webduino

The Appearence

Board dimensions: 3cm in length, 2.5cm in width, 1.3cm in height, and a weight of 85 grams. Digital pins: 0, 2, 4, 5, 14, and 16. PWM pins: 12, 13, 15. Analog Pin: AD (A0). Other pins: TX, RX, 3.3V, VCC, RST, and GRD.

The front and back images:

Reference with AA & AAA batteries:

On-board Components and Pins

Webduino Smart has a photocell sensor, an RGB LED, and a micro switch button onboard. The photocell is connected to the AD pin, and the RGB (Red, Geen, Blue) LED is connected to pins 15, 12, and 13 respectively (The LED is a common cathode, whereas most of the examples on this site use common anode RGB LED.) And the micro switch button is connected to pin 4. Please take note when you use these pins.

more please visit webduino official website:

https://webduino.io/en/tutorials/smart-01-information.html

easy to buy a sample:
https://www.aliexpress.com/store/product/BPI-Webduino-smart-home-IOT-development-board/302756_32762020761.html