Product Details

• 11 digital input/output pins
• Interrupt/pwm/I2C/one-wire
• 1 analog input(3.2V max input)
• 16M bytes(128M bit) Flash
• External antenna connector
• Built-in ceramic antenna
• New CP2104 USB-TO-UART IC
• Same size as D1 mini, but more light

Specification:

• Microcontroller ESP-8266EX
• Operating Voltage 3.3V
• Digital I/O Pins 11
• Analog Input Pins 1(Max input: 3.2V)
• Clock Speed 80MHz/160MHz
• Flash 16M bytes

It is important to note that we have found that the 5V pin should not be used to power the Wemos D1 Mini and may possibly damage the module. It is best to use the USB adapter to power the device. 

Tutorials

Providing Power to an Arduino
Options available to provide power to an Arduino is discussed here.

Arduino Automated Plant Water Project
A simple but practical Arduino project to automatically water your plants, showing the usage of a 7-Segment Display, a Soild Moisture Sensor, a Temperature Sensor and a Relay.

Arduino Introduction
Introducing you to the awesome Arduino!

Simple Arduino RC Car/Robot
A guide to construct your own Arduino-based 2 Wheel-Drive Robot

Arduino F.A.Q
Arduino Frequently Asked Questions & Answers