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ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash

Name: Amazon.com: DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash : Electronics
Price: 6.59 USD
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Rating: 4.4 (778 reviews)

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ESP8266 ESP-01S Module + 2.4G WiFi Antenna

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ESP8266 ESP-01S Module + Firmware Downloader

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Purchase options and add-ons

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

About this item

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

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This item: DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash

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ELEGOO MEGA R3 Board ATmega 2560 + USB Cable Compatible with Arduino IDE Projects RoHS Compliant

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KOOBOOK 1Pcs L298P Shield R3 Motor Driver Module Expansion Board H-Bridge 2A for Arduino UNO 2560

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Founded in 2014, DIYmall. Specializes in providing comprehensive solutions for LoRa, IOT/IIOT, Audio, Automation, Smart Home, etc.

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Price	$6.59	$9.98	$12.99	$27.50	$16.39	$7.99
Delivery	Get it as soon as Tuesday, Jul 1	Get it as soon as Tuesday, Jul 1	Get it as soon as Tuesday, Jul 1	Get it as soon as Tuesday, Jul 1	Get it as soon as Tuesday, Jul 1	Get it as soon as Tuesday, Jul 1
Customer Ratings	4.4778	4.4104	4.584	4.71,293	4.61,357	4.42,882
Sold By	DIYmall	Stemedu	Aitrip	Arduino	HiLetgo	HiLetgo
operating system	—	—	—	FreeRTOS	Minimalistic operating system or RTOS for microcontrollers	Linux
hardware interface	—	usb	—	bluetooth	—	usb
cpu manufacturer	Espressif Systems	Espressif	Espressif	—	Espressif	Espressif Systems
cpu family	—	MediaTek MT8125	—	—	MediaTek MT8125	MediaTek MT8125
RAM tech	—	—	—	SRAM	LPDDR3	LPDDR4
connectivity tech	Wi-Fi	USB	Wi-Fi	Wi-Fi, Bluetooth, USB	Wi-Fi	Wi-Fi, USB
wireless standard	802 11 B	802 11 BGN	802 11 BGN	bluetooth	802 11 B	802 11 B
core count	1	1	—	1	1	1

Product Description

About program: Please choose "Generic ESP8266 Module" board in Arduino IDE to program it.

Description:

Comparing to esp-01, esp-01s has these advantages: The PCB layout has changed for an improvement in WiFi radio performance 4MB Flash Memory...upgraded from 32Mbit Latest version esp-01s,with stronger signal

Feature:

> SDIO 2.0, SPI, UART

> 32-pin QFN package

> Wi-Fi Direct (P2P), soft-AP

> Integrated TCP/IP protocol stack

> Integrated TR switch, balun, LNA, power amplifier and matching network

> Integrated PLLs, regulators, DCXO and power management units

> +19.5dBm output power in 802.11b mode

> Power down leakage current of <10uA

> Integrated low power 32-bit CPU could be used as application processor

>>>

> SDIO 1.1/2.0, SPI, UART

> STBC, 1×1 MIMO, 2×1 MIMO

> A-MPDU & A-MSDU aggregation & 0.4ms guard interval

> Integrated RF switch, balun, 24dBm PA, DCXO, and PMU

> Integrated RISC processor, on-chip memory and external memory interfaces

> Integrated MAC/baseband processors

> Quality of Service management

> I2S interface for high fidelity audio applications

>>>

> On-chip low-dropout linear regulators for all internal supplies

> Proprietary spurious-free clock generation architecture

> Integrated WEP, TKIP, AES, and WAPI engines

Specification:

> 802.11 b/g/n

> Wake up and transmit packets in < 2ms

> Standby power consumption of < 1.0mW (DTIM3)

Connect with Arduino

Ar duino-------------01S

TX>1-----------------TXD

RX>0-----------------RXD

GND-----------------GND

3.3-------------------VCC

3.3-------------------CHPD

(You can connect VCC and CHPD to breadboard+,then connect breadboard+ to Arduino 3.3V)

	DIYmall USB to ESP8266 CH340C ESP-01 ESP-01S Breakout Prog WiFi Programmer Do...	DIYmall ESP8266 ESP-01 Breakout Board ESP-01S Breadboard Adapter PCB Board fo...	ESP32 Programming Module Test Board Burning Fixture System Development Board ...	DIYmall ESP8266 Firmware Downloader Flash Download Tool Test Board Code Burne...	DIYmall 2PCS USB to ESP8266 Breakout CH340C ESP-01 ESP-01S Prog WiFi Programm...	DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash

Customer Reviews	102	123	2	102	102	778
Price	$10.99	$7.99	$23.99	$21.99	$9.99	$6.59
Available	✓	✓	✓	✓	✓	✓

What's in the box

Product information

Technical Details

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Summary

Wireless Type	‎802.11b

Other Technical Details

Brand	‎DIYmall
Series	‎FBA_FZ1082
Item model number	‎ESP8266
Item Weight	‎0.106 ounces
Product Dimensions	‎0.98 x 0.39 x 0.47 inches
Item Dimensions LxWxH	‎0.98 x 0.39 x 0.47 inches
Processor Brand	‎Espressif Systems
Number of Processors	‎1
Manufacturer	‎DIYmall
ASIN	‎B00O34AGSU
Country of Origin	‎China
Is Discontinued By Manufacturer	‎No
Date First Available	‎October 1, 2014

Additional Information

Customer Reviews	778 ratings 4.4 out of 5 stars
Best Sellers Rank	#71 in Computer Networking Transceivers

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

Product Warranty: For warranty information about this product, please click here

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Customer reviews

778 global ratings

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Customers say

Customers find the ESP8266 WiFi module works well, with one mentioning it functions as an add-on to Arduino boards, and they appreciate its WiFi connectivity, noting it instantly connects to networks. The module receives positive feedback for its quality, chip performance, and design, while customers find it good value for money at $3. While some customers find it easy to work with, others mention it's not very easy to use.

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Functionality Wifi connectivity Value for money Quality Chip quality Design Size Ease of use

53 customers mention "Functionality"41 positive12 negative

Customers report that the ESP8266 module works well, with some specifically mentioning its compatibility with Prusa printers and Arduino boards. One customer notes its effectiveness as a standalone device with Micropython.

"Bought to upgrade my Prusa Mini - Works perfectly well. Drop in and upgrade your firmware." Read more

"I used this for a school project and it worked well. Connecting was quick and easy as long as you have the ESP WiFi documentation handy...." Read more

"The product works as expected. However mine burnt down though and smoked...." Read more

"...The second one just had endless problems and would basically reset it’s connection over and over...." Read more

20 customers mention "Wifi connectivity"15 positive5 negative

Customers report positive experiences with the WiFi connectivity of this module, noting that it instantly connects to networks, with one customer mentioning extremely good range and another highlighting its suitability for Internet of Things applications.

"...Easy to transfer files over to the Mini+ now via PrusaLink or PrusaConnect through Prusaslicer...." Read more

"I used this for a school project and it worked well. Connecting was quick and easy as long as you have the ESP WiFi documentation handy...." Read more

"...Not the ESP-01S. The ESP-01 is an older board with worse Wi-Fi radio performance, only 512KB flash, and no pin labels...." Read more

"...a lot easier and from the first try I was able to program it, connect to WiFi and go on with the project I intended to build." Read more

15 customers mention "Value for money"12 positive3 negative

Customers find the WiFi module offers good value for money, particularly noting that it provides WiFi functionality for just $3.

"...the other hand if you know how to work with this module, it's the most inexpensive and thus the best option to put in a final project that you don't..." Read more

"...These modules are a good purchase. Communicated through Serial IO on Arduino boards to Thing Speak...." Read more

"...Good choice for the price!" Read more

"...Cons: * Somewhat expensive compare to other EP8266 boards...." Read more

10 customers mention "Quality"7 positive3 negative

Customers appreciate the quality of the ESP-01S board, with one customer noting its well-built construction and another highlighting its ultra solid packaging.

"...I am able to update the firmware on this thing * Ultra solid packaging. You can tell they care about their units..." Read more

"...Big quality of life luxury for less than $10 shipped. Great purchase." Read more

"...well for weeks until one time I applied 5v to the chip and it became damaged...." Read more

"...Great seller great quality and packaging...." Read more

8 customers mention "Chip quality"8 positive0 negative

Customers praise the chip quality of the module.

"Great chip. Fairly easy to program with the arduino IDE, and I actually used my Uno as an FTDI breakout board for programming it...." Read more

"...Though, the ESP8266 is a wonderful chip and I would definitely recommend it to anyone looking to make their own Iot gadget!" Read more

"Excellent little board. I bought two and used them both in projects already. Can be either a client or a server. They've worked flawlessly for me...." Read more

"good product!" Read more

4 customers mention "Design"4 positive0 negative

Customers appreciate the design of the ESP8266 module.

"...Highly recommend, they're neat and fun to play with. Also, wifi range is extremely good for such a small antenna...." Read more

"Awesome little board with great potential. Take your time and read over the online guides and wiring diagrams and you will be just fine...." Read more

"beautiful packaging. a brilliant litte design. it's exactly as spec'd. i hope i can figure it oul lol...." Read more

"Item looks good and as advertised. Thanks, LD" Read more

4 customers mention "Size"4 positive0 negative

Customers appreciate the size of the module, describing it as tiny and inexpensive, with one customer noting its fantastic footprint.

"...needs some basic access to the internet, then they are a good/cheap/small solution." Read more

"...higher number of I/O pins are available, but this one is fantastic in terms of footprint and power consumption." Read more

"Awesome.... small and it works with micropython. Definitely buy again." Read more

"...correctly and the functionality is amazing for something so tiny and inexpensive." Read more

20 customers mention "Ease of use"11 positive9 negative

Customers have mixed experiences with the module's ease of use, with some finding it straightforward to hook up and work with, while others report it is not very easy to use.

"...firmware on this thing twice so I know it works and I am able to access the AT commands. I think it overheated due to my "abuse"...." Read more

"...however, considering that I'm a beginner, it was a little complicated to use and YouTube videos weren't really helpful...." Read more

"LITTLE POWERHOUSE! This ESP8266 module is great for beginners and experts alike...." Read more

"...Now, as far as the module itself, it is quite hard to work with, if you're a beginner like myself, you'd be better off getting a 5V module..." Read more

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Top reviews from the United States

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Christopher J.
Works perfectly on the Prusa Mini+
Reviewed in the United States on April 25, 2025
Verified Purchase

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.

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BRono
Works well with Prusa Mini
Reviewed in the United States on March 24, 2025
Verified Purchase
Bought to upgrade my Prusa Mini - Works perfectly well. Drop in and upgrade your firmware.

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Cody Wilson
Worked perfectly with the Prusa Mini
Reviewed in the United States on December 1, 2024
Verified Purchase
Fit right in place on the Prusa Mini+. I had to bend out the case a little bit when first installing, but the pins fit right into place, and the firmware flashed immediately on reboot.

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One person found this helpful

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Ryan
Added wifi to my Prusa Mini
Reviewed in the United States on January 27, 2025
Verified Purchase
This was plug-and-play with my Prusa Mini 3D printer.

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Ethan
School project
Reviewed in the United States on June 27, 2024
Verified Purchase
I used this for a school project and it worked well. Connecting was quick and easy as long as you have the ESP WiFi documentation handy. Would recommend to anyone trying to use WiFi in their project!

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Derek
Great for the price but extremely difficult to use
Reviewed in the United States on March 29, 2015
Verified Purchase
Very difficult to get to work with arduino though I did eventually get it to work only to find out it wouldn't do what I needed, which was downloading google calendar data directly from google, which requires ssl, and this does not support that. I'm not basing my rating on the ssl issue as I understand why it doesn't have it, but the difficulty of getting this to work was almost unbearable. I spent a lot of time on it, though I'm sure there is a lot more examples and docs out now that my make it easier. Also, I tried the built in online update command on it and it put it into an infinite loop that I have not been able to break it out of. I tried resetting it, leaving it disconnected from everything for days, everything that I can and it won't break out of the cycle. I eventually gave up and bought a replacement.

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One person found this helpful

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Mark Serrano
Firmware updating works but I burned my unit
Reviewed in the United States on June 8, 2017
Verified Purchase
The product works as expected. However mine burnt down though and smoked. It might be my fault because I accidentally inserted the GND pin to the MST pin. I did a lot of firmware rewrite on this because I was having trouble doing a firmware update on another ESP8266 dev board. So this DIYmall is basically my guinea pig. I am able to update the firmware on this thing twice so I know it works and I am able to access the AT commands. I think it overheated due to my "abuse".

Cons:
* Somewhat expensive compare to other EP8266 boards. Well $6 isn't that much really but there are packages from other sellers here in Amazon that sells 4 of these for $14. So that is like $3.50 each. Almosr 50% cheaper..
* It burnt. I am still 50/50 if it's me or the unit

Pros:
* I am able to update the firmware on this thing
* Ultra solid packaging. You can tell they care about their units

By the way I like the DIYmall brand. I like their OLED displays.

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3 people found this helpful

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Borz
Works for Prusca Mini+
Reviewed in the United States on September 15, 2023
Verified Purchase
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.

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Rahul S.
Good Product. I had a few problems for uploading ...
Reviewed in India on August 17, 2017
Verified Purchase

Good Product .
I had a few problems for uploading my program onto it for the first time .. but then google helps .
If anyone else is having a problem a problem then the GPIO pin has to be made ground then reset then release them to enter flashing mode .
And through the pins are 5 V tolerant they are meant to work with 3.3 V ,so use them at 5 V at your own risk .
And the problem which i face often . Power Issue . The Module draws a lot of current , that why best is to use external source (with common ground very important) .

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Tamer
Hızlı geldi ve Çalışıyor
Reviewed in Turkey on May 8, 2021
Verified Purchase
Ürün hızlı gönderildi ve ürün anlatıldığı gibi bir sorun yok.

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Dustin West
Added wifi to my prusa 3D printer
Reviewed in Canada on April 27, 2024
Verified Purchase
This chip worked great. I was able to plug it directly into my prusa mini to add wifi capability with no issues.

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Angel Morin
Excelente compra
Reviewed in Mexico on September 2, 2020
Verified Purchase
Excelente compra, tamaño perfecto

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Propellerhead333
Works like a charm.
Reviewed in Canada on August 14, 2023
Verified Purchase
Did the trick for my printer.

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ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash

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5.0 out of 5 stars Good Product. I had a few problems for uploading ...

5.0 out of 5 stars Hızlı geldi ve Çalışıyor

5.0 out of 5 stars Added wifi to my prusa 3D printer

5.0 out of 5 stars Excelente compra

5.0 out of 5 stars Works like a charm.

Good Product. I had a few problems for uploading ...

Hızlı geldi ve Çalışıyor

Added wifi to my prusa 3D printer

Excelente compra

Works like a charm.