Overview

The **ESP8266 Wemos D1** is a versatile Wi-Fi-enabled microcontroller board based on the ESP8266 chip. It is designed for IoT applications and offers an Arduino Uno-like layout, making it compatible with various Arduino shields. With integrated Wi-Fi capabilities, the Wemos D1 is ideal for wireless communication, enabling seamless IoT solutions.

Specifications

• Microcontroller: ESP8266
• Clock Speed: 80 MHz (can be overclocked to 160 MHz)
• Flash Memory: 4 MB
• RAM: 80 KB
• Wi-Fi: 802.11 b/g/n
• Operating Voltage: 3.3V
• Digital I/O Pins: 11
• Analog Input Pins: 1 (10-bit ADC)
• Current Consumption: ~80 mA
• Dimensions: 68.6mm x 53.4mm

Pinout Explanation

The Wemos D1 pinout offers a variety of I/O capabilities:

• 3V3: Provides 3.3V for peripherals.
• GND: Ground pin.
• D0 (GPIO16): Can be used as a digital I/O pin. It does not support PWM or I2C.
• D1 (GPIO5): Supports PWM, I2C (SCL), and digital I/O.
• D2 (GPIO4): Supports PWM, I2C (SDA), and digital I/O.
• D3 (GPIO0): Digital I/O and PWM pin.
• D4 (GPIO2): Digital I/O, PWM, and used for the on-board LED.
• D5 (GPIO14): Supports PWM, SPI (SCLK), and digital I/O.
• D6 (GPIO12): Supports PWM, SPI (MISO), and digital I/O.
• D7 (GPIO13): Supports PWM, SPI (MOSI), and digital I/O.
• D8 (GPIO15): Digital I/O and SPI (CS).
• A0: Analog input pin (0–1V, 10-bit resolution).
• RX (GPIO3): UART receive pin.
• TX (GPIO1): UART transmit pin.

Applications

The ESP8266 Wemos D1 is ideal for:

• IoT-based home automation systems.
• Wireless sensor networks.
• Smart appliances and monitoring systems.
• Web servers for remote control.
• Wi-Fi-enabled robotics projects.