ESP8266 Wemos D1 Mini Pinout & Specifications

Welcome to the definitive pinout guide for the ESP8266 Wemos D1 Mini.

A tiny, stackable ESP8266 board perfect for smart home sensors.

Key Specifications

• Operating Voltage: 3.3V
• Input Voltage: 5V via USB or VIN
• Wi-Fi: 802.11 b/g/n
• Clock Speed: 80-240 MHz

Important Wiring Notes

• Power: ESP boards use 3.3V logic. Do not connect 5V sensors directly to the GPIO pins without a logic level shifter!
• Strapping Pins: Be careful using pins like GPIO 0, 2, 5, 12, and 15, as they are used during the boot process to determine the boot mode.

Related Guides

Need to learn how to wire sensors to this board? Check out our Academy for step-by-step tutorials!