WeMos D1 Mini
WeMos D1 Mini is a miniature Wi-Fi development board based on the ESP8266 ESP-12S module, packing a Tensilica L106 32-bit RISC processor, 4 MB flash, and integrated 2.4 GHz Wi-Fi into a tiny 34.2×25.6 mm PCB. The board exposes 11 digital GPIO pins and one analog input supporting I2C, SPI, and UART through standard headers, and a Micro-USB port with an onboard USB-to-serial converter simplifies firmware uploads.
Overview
The WeMos D1 Mini is a compact Wi-Fi development board built around Espressif’s ESP8266 module (ESP-12F). Its small footprint and stackable shield ecosystem make it popular for space-constrained IoT projects, while the on-board Wi-Fi lets you connect directly to ThingsBoard over MQTT without any additional hardware.
Key Features
- Single-core processor: Xtensa L106 @ 80/160 MHz
- Wireless: Wi-Fi 802.11 b/g/n (2.4 GHz)
- GPIO: 11 digital I/O pins (3.3V logic) and 1 analog input (A0, 0–3.2V)
- Compact form factor: 34.2 mm × 25.6 mm, suitable for space-constrained builds
- Shield ecosystem: Compatible with a wide range of WeMos D1 Mini shields
- On-board: USB-to-serial bridge (CH340/CH9102), reset button, built-in LED (D4/GPIO2)
- Power: 5V via USB or external supply; 3.3V onboard regulator
- SDK support: Arduino IDE, MicroPython, NodeMCU
Hardware Specifications
| Parameter | Value |
|---|---|
| Chip | ESP8266 (Espressif ESP-12F) |
| CPU | Xtensa L106, 80/160 MHz |
| Flash | 4 MB SPI Flash |
| RAM | ~80 KB usable SRAM |
| Wi-Fi | 802.11 b/g/n (2.4 GHz) |
| Digital I/O | 11 pins (3.3V logic) |
| Analog input | 1 pin (0–3.2V) |
| USB | Micro-USB (CH340 / CH9102 USB-to-UART bridge) |
| Dimensions | 34.2 mm × 25.6 mm |
| Operating voltage | 3.3V (I/O) |
| Power supply | 5V via USB |
| Operating temperature | −40°C to +125°C |
Supported Use Cases
- Smart home: Wi-Fi-connected switches, sensors, and displays
- Environment monitoring: temperature, humidity, air quality
- Smart office and smart farming automation
- Energy monitoring and data logging
Device Technical Documentation
Download datasheets and manuals for the WeMos D1 Mini
WeMos D1 Mini Product page WeMos D1 Mini DatasheetAdd Your Device to the Community
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