---
product_id: 7443534
title: "ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash"
brand: "diymall"
price: "€ 13.00"
currency: EUR
in_stock: true
reviews_count: 8
category: "Di Ymall"
url: https://www.desertcart.fi/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash
store_origin: FI
region: Finland
---

# Ultra-compact 3g lightweight design 4MB Flash Memory for robust storage Latest ESP-01S with stronger WiFi signal ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash

**Brand:** diymall
**Price:** € 13.00
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your IoT game with lightning-fast WiFi and powerful memory!

## Quick Answers

- **What is this?** ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash by diymall
- **How much does it cost?** € 13.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash)

## Best For

- diymall enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** Tiny 0.98" x 0.39" module weighing just 3 grams—perfect for sleek, space-conscious projects.
- • **Future-Proof Your Tech:** Join thousands of pros who’ve enhanced their 3D printers, IoT devices, and more with this top-rated transceiver.
- • **Generous 4MB Flash Memory:** Store and run complex programs effortlessly with ample onboard flash storage.
- • **Plug & Play Compatibility:** Works flawlessly with Arduino IDE and popular OS like Windows, macOS, and Linux for instant development.
- • **Seamless WiFi Integration:** Upgrade your devices with the latest ESP-01S module for reliable, high-speed wireless connectivity.

## Overview

The DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module features a cutting-edge ESP-01S chip with a stronger signal and 4MB flash memory, enabling seamless wireless communication for devices with UART or USB interfaces. Compact and lightweight, it supports multiple operating systems and is ideal for upgrading 3D printers, IoT projects, and embedded systems with reliable WiFi connectivity.

## Description

Buy DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash: Network Transceivers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Works perfectly on the Prusa Mini+ - Installed the board, updated the firmware on the Mini, and now I had Wifi capability. Easy to transfer files over to the Mini+ now via PrusaLink or PrusaConnect through Prusaslicer. Wish I'd bought one sooner, though really I don't know why the printer doesn't come with it in the first place.
Review: successful install in Prusa MINI+ - I installed this in my Prusa MINI+ running FW6.2.6. To activate a PrusaLink connection between my computer and printer I hand-entered the WiFi username and password using the printer's WiFi Wizard. Then, I typed the printer's IP address into my computer browser's command line, this opens PrusaLink. There, I entered the printer's username and password found in the printer's PrusaLink menu. When PrusaLink opens in the browser, simply drag a *. bgcode ready for printing into the File Upload field and it begins transferring to the printer. The printer asks if you want to print after the transfer is complete .

## Features

- 4MB Flash Memory
- Latest version esp-01s, with stronger signal
- Document: https://nurdspace(dot)nl/ESP8266
- About program: Please choose "Generic ESP8266 Module" board in Arduino-IDE to program
- What You Get: 1 X ESP8266-01S Module

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00O34AGSU |
| Best Sellers Rank | #57 in Computer Networking Transceivers |
| Brand | DIYmall |
| Built-In Media | / |
| Compatible Devices | devices with UART interface or USB Type A interface |
| Connectivity Technology | Wi-Fi |
| Customer Reviews | 4.5 out of 5 stars 798 Reviews |
| Included Components | / |
| Item Dimensions L x W x H | 0.98"L x 0.39"W x 0.47"H |
| Item Weight | 3 Grams |
| Manufacturer | DIYmall |
| Memory Storage Capacity | 4 MB |
| Model Name | FBA_FZ1082 |
| Operating System | Windows, macOS, Linux |
| Processor Brand | Espressif Systems |
| Processor Count | 1 |
| RAM Memory Installed | 4 MB |
| RAM Memory Technology | LPDDR3 |
| Ram Memory Installed Size | 4 MB |
| UPC | 702795761325 |
| Warranty Description | 1 year |
| Wireless Compability | 802.11b |

## Product Details

- **Brand:** DIYmall
- **Connectivity Technology:** Wi-Fi
- **Memory Storage Capacity:** 4 MB
- **Model Name:** FBA_FZ1082
- **Ram Memory Installed Size:** 4 MB

## Images

![ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash - Image 1](https://m.media-amazon.com/images/I/61F1PAmbCVL.jpg)

## Questions & Answers

**Q: Will someone please give a simple example of an application for this module? - Arduino novice.**
A: ////this code let u to initial ur ESP01 and get into AT commend Mode，but you hav  to connect the wire properly.

#include <SoftwareSerial.h>

SoftwareSerial esp(10, 11); // RX, TX for esp01 communication
void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(115200);
  Serial.println("Goodnight moon!");
 
  // set the data rate for the SoftwareSerial port
  esp.begin(115200); //for esp01 
  esp.println("Hello, world?"); // it shows that esp01 doesn't response 
}
 
void loop() { // run over and over
  if (esp.available()) {
    Serial.write(esp.read());
  }
 // else Serial.println("No connect");
  if (Serial.available()) {
    esp.write(Serial.read());
  }
}

**Q: Are the header pins already soldered on the board?**
A: Yes, soldered. and there are 8 header pins.

**Q: what baud rate are these set at. thank you**
A: It comes at 9600 baud but can be set to another rate with an AT command and the change persists across power cycles.  I strongly recommend flashing with a more recent firmware revision as this one is a little flaky.

**Q: What is the memory in this board? one picture says 4 mb and the other says 1 mb**
A: We just received one 4/12/22 and it has 1MB and we are returning it for Not As Advertised. Unimpressed!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works perfectly on the Prusa Mini+
*by C***. on April 25, 2025*

Installed the board, updated the firmware on the Mini, and now I had Wifi capability. Easy to transfer files over to the Mini+ now via PrusaLink or PrusaConnect through Prusaslicer. Wish I'd bought one sooner, though really I don't know why the printer doesn't come with it in the first place.

### ⭐⭐⭐⭐⭐ successful install in Prusa MINI+
*by B***B on October 13, 2025*

I installed this in my Prusa MINI+ running FW6.2.6. To activate a PrusaLink connection between my computer and printer I hand-entered the WiFi username and password using the printer's WiFi Wizard. Then, I typed the printer's IP address into my computer browser's command line, this opens PrusaLink. There, I entered the printer's username and password found in the printer's PrusaLink menu. When PrusaLink opens in the browser, simply drag a *. bgcode ready for printing into the File Upload field and it begins transferring to the printer. The printer asks if you want to print after the transfer is complete .

### ⭐⭐⭐⭐⭐ Works for Prusca Mini+
*by B***Z on September 15, 2023*

Purchased this based on other reviews that said it works with the Prusca. Worked like a charm with no issues. Such a big difference being able to send prints to the printer without the USB! I really didn't like the USB transfer process but got used to it. Now after being spoiled with this Wifi card, I look back and really hate the USB process now! Big quality of life luxury for less than $10 shipped. Great purchase.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.fi/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash](https://www.desertcart.fi/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-13*