---
product_id: 407644160
title: "KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board 4M Bytes for Arduino for NodeMcu for WeMos (5PCS)"
brand: "keeyees"
price: "$2.23"
currency: USD
in_stock: false
url: https://www.desertcart.us/products/407644160-keeyees-esp8266-esp-12f-mini-wlan-wifi-development-board-4m
store_origin: US
region: United States of America
---

# 4M Flash Memory Micro USB Power & Data 11 I/O Pins with PWM & I2C KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board 4M Bytes for Arduino for NodeMcu for WeMos (5PCS)

**Brand:** keeyees
**Price:** $2.23
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Unlock your IoT potential with KeeYees ESP8266 – where innovation meets compact power!

## Quick Answers

- **What is this?** KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board 4M Bytes for Arduino for NodeMcu for WeMos (5PCS) by keeyees
- **How much does it cost?** $2.23 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/407644160-keeyees-esp8266-esp-12f-mini-wlan-wifi-development-board-4m)

## Best For

- keeyees enthusiasts

## Why This Product

- Trusted keeyees brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Pin Control:** 11 digital I/O pins supporting interrupts, PWM, I2C, and one-wire protocols for ultimate project flexibility.
- • **Massive 4MB Flash Storage:** Ample onboard memory to handle complex Arduino, NodeMCU, and WeMos projects effortlessly.
- • **Plug & Play USB Interface:** Micro USB port for easy power supply and programming—no extra adapters needed.
- • **Seamless WiFi Integration:** Built-in ESP8266 chip with 802.11b WiFi for instant IoT connectivity.
- • **Comprehensive Developer Support:** Includes detailed PDF tutorials and GitHub resources to accelerate your build time.

## Overview

The KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board is a compact, 4MB flash memory-enabled module designed for Arduino, NodeMCU, and WeMos compatibility. Featuring 11 versatile digital I/O pins with interrupt, PWM, I2C, and one-wire support, plus a convenient micro USB interface, it empowers developers to create connected projects with ease. Perfect for professionals seeking reliable, scalable IoT solutions backed by comprehensive tutorials and community support.

## Description

Product Specification: WIFI Development Board, 4M bytes. Supported (except D0). Support OTA on line. 1 Micro USB connection. 1 analog input (3.3V max input). 5V 1A switching power supply onboard. 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire and a micro-USB connection.  How to get it started: - Setup driver Before you use the Development Board, you need set up driver. - Python On Windows you need install Python 2.7.10. On Linux, MAC OSX, you don't need install it, comes preinstalled with OS. - Installing Hardware package "Boards Manager or GIT". We recommend using GIT, you can always get the latest version. You can also download detailed PDF tutorial through Githubcom/Keeyees/0001. Or contact us via   Product List: 5 x Development Board

## Features

- Mini Development Board based on ESP8266 chip.
- This board contains 11 digital input / output pins, all pins have interrupt / pwm / I2C / 1-wire and a micro USB connection.
- This board is 100% compatible with for Arduino and for WeMos.
- WIFI development board, with 4 MB of flash memory.
- Technical Support: Our PDF tutorial is available on this page. Please pull down this page to find the tutorial: User Guide (PDF)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | KeeYees |
| Manufacturer | KeeYees |
| Package Dimensions | 16.2 x 13.2 x 3.2 cm; 40 g |
| Item part number | KY29-US |
| Memory Storage Capacity | 4 MB |
| Ram Memory Installed Size | 4 MB |
| Hard Drive Interface | USB |
| Operating System | Linux |
| Processor Brand | Espressif |
| Processor Count | 2 |
| Hardware Interface | USB |
| Compatible Devices | Arduino, NodeMcu, WeMos |
| Mounting Hardware | 5 x Development Board |
| Batteries Included | No |
| Batteries Required | No |
| Wireless Type | 802.11b |
| Total USB ports | 1 |
| Connector Type | I2C, USB, WLAN, Wi-Fi |
| Manufacturer | KeeYees |
| Item Weight | 40 g |

## Product Details

- **Brand:** KeeYees
- **RAM Memory Installed Size:** 4 MB
- **Memory Storage Capacity:** 4 MB
- **Connectivity Technology:** I2C, USB, WLAN, Wi-Fi
- **Included Components:** 5 x Development Board

## Images

![KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board 4M Bytes for Arduino for NodeMcu for WeMos (5PCS) - Image 1](https://m.media-amazon.com/images/I/81yX55Yd+EL.jpg)
![KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board 4M Bytes for Arduino for NodeMcu for WeMos (5PCS) - Image 2](https://m.media-amazon.com/images/I/71zMdlQ+6uL.jpg)
![KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board 4M Bytes for Arduino for NodeMcu for WeMos (5PCS) - Image 3](https://m.media-amazon.com/images/I/61fD1HgVDNL.jpg)
![KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board 4M Bytes for Arduino for NodeMcu for WeMos (5PCS) - Image 4](https://m.media-amazon.com/images/I/61fD1HgVDNL.jpg)
![KeeYees ESP8266 ESP-12F Mini WLAN WiFi Development Board 4M Bytes for Arduino for NodeMcu for WeMos (5PCS) - Image 5](https://m.media-amazon.com/images/I/61LDaZAXEIL.jpg)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-22*