ESP8266 D1 Mini V3 4MB blue circuit board top view for Arduino

ESP8266 D1 Mini V3 4MB Pre-Soldered Dev Board for Arduino

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ShillehTek ESP8266 D1 Mini V3 with presoldered headers and 4MB flash streamlines assembly and provides ample firmware space on a compact WiFi development module for rapid prototyping.

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Overview

Product Overview

The ShillehTek ESP8266 D1 Mini V3 4MB Dev Board (Presoldered) is a compact WiFi microcontroller board built for fast IoT prototyping and smart home projects. With preinstalled headers, it’s ready to plug into breadboards and header sockets for quick wiring, testing, and iteration. Powered by the popular ESP8266 platform and equipped with 4MB flash, it’s a solid choice for MQTT sensor nodes, simple web servers, automation triggers, and wireless telemetry. The D1 Mini V3 form factor keeps it compatible with many D1 Mini shields and common Arduino-style workflows, making it easy to build and deploy small connected devices.

Questions & answers

Frequently asked questions

Yes. It uses the ESP8266 platform and fits common Arduino-style workflows, so it can be programmed for WiFi IoT projects. The D1 Mini V3 form factor is also compatible with many D1 Mini shields.
Yes. This version includes preinstalled headers, so it can plug directly into breadboards or matching header sockets. That removes the soldering step and makes wiring, testing, and swapping connections faster during prototyping.
The ESP8266 provides WiFi connectivity and uses 3.3V logic on its GPIO pins. Avoid connecting 5V signals directly to ESP8266 pins unless proper level shifting or compatible circuitry is used.
It is well suited for compact WiFi projects such as MQTT sensor nodes, simple web servers, smart home automation triggers, and wireless telemetry devices. The 4MB flash supports typical ESP8266 sketches and small connected applications.
Use a USB cable that supports data, select an ESP8266-compatible D1 Mini board profile in the Arduino environment, and choose the correct serial port. Also confirm the pre-soldered headers are firmly seated in the breadboard or socket.

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What's included

Features & Specs

ESP8266 WiFi Platform Proven WiFi microcontroller for smart home and IoT prototypes.

4MB Flash Storage Room for firmware, libraries, and lightweight file storage.

D1 Mini Shield Support Compatible with many D1 Mini shields and add-on modules.

MQTT and Web Projects Great for MQTT devices, web servers, REST endpoints, and wireless sensors.

Quick Wiring Setup Headers are installed so you can start connecting peripherals immediately.

Compact for Enclosures Small footprint fits tight installs and distributed sensor nodes.

Peripheral Friendly I/O Works well with common I2C, SPI, and UART modules like OLEDs, relays, and sensors.

Reference

Documents

Full Product Manual ShillehTek ESP8266 D1 Mini V3 4MB Dev Board Presoldered | ShillehTek Product Manual In-depth setup guide with wiring, code examples, and troubleshooting.

Datasheet

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