D1 Mini ESP8266 Wi-Fi Board

The D1 Mini squeezes an ESP8266 with 4 MB flash, USB and a 3.3 V regulator into a 34 × 26 mm board. Its standard 16-pin layout accepts dozens of stackable shields — relays, OLEDs, temperature sensors, battery chargers — so you can build a finished device without a breadboard. It is a favourite for ESPHome and Tasmota smart-home sensors.

Key features

• ESP8266 with 4 MB flash and Wi-Fi in a 34 × 26 mm footprint
• Compatible with the large family of D1 Mini stackable shields
• USB programming with auto-reset (CH340)
• Runs Arduino, MicroPython, ESPHome, Tasmota
• Male and female headers supplied for stacking

Specifications

What's in the box

• 1 × D1 Mini board
• Set of male, female and stacking headers (unsoldered)

Ideal for

• Small smart-home sensors
• Wi-Fi buttons and switches
• Battery-powered nodes with deep sleep

Good to know

• Connect D0 to RST if you want the board to wake itself from deep sleep.
• USB connector may be Micro-USB or USB-C depending on batch.