--- product_id: 7443534 title: "ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash" brand: "diymall" price: "S$12" currency: SGD in_stock: true reviews_count: 13 category: "Di Ymall" url: https://www.desertcart.sg/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash store_origin: SG region: Singapore --- # Ultra-compact & lightweight 4MB Flash memory Strong WiFi signal ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash **Brand:** diymall **Price:** S$12 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your IoT game with the ESP8266 ESP-01S — small size, big impact! ## Quick Answers - **What is this?** ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash by diymall - **How much does it cost?** S$12 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/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 Powerhouse:** Tiny 0.98" x 0.39" module weighing just 3 grams—perfect for sleek, space-conscious projects. - • **Trusted by Makers & Pros:** Join 800+ satisfied users who boosted their devices’ capabilities with this top-rated module. - • **Plug & Play Compatibility:** Works flawlessly with UART and USB Type A interfaces across Windows, macOS, and Linux. - • **Seamless WiFi Integration:** Upgrade your devices with rock-solid 802.11b WiFi connectivity for instant network access. - • **Generous 4MB Flash Storage:** Store and run complex firmware effortlessly with ample onboard memory. ## Overview The DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module features a robust 4MB flash memory and enhanced signal strength, enabling reliable 802.11b WiFi connectivity. Compact and lightweight, it supports UART and USB Type A interfaces and is compatible with major operating systems. Ideal for upgrading devices like 3D printers, it offers seamless wireless file transfer and network integration, backed by a strong user community and a 1-year warranty. ## Description 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 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 Standby power consumption of 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) 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 | #73 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 | 4.4 out of 5 stars 804 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 | | Mfr Part Number | FBA_FZ1082 | | Model Name | FBA_FZ1082 | | Model Number | ESP8266 | | Operating System | Windows, macOS, Linux | | Processor Count | 1 | | RAM Memory Installed | 4 MB | | RAM Memory Technology | LPDDR3 | | Ram Memory Installed Size | 4 MB | | Smart Home Compatibility | Not Smart Home Compatible | | UPC | 702795761325 | | Unit Count | 1.0 Count | | 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) ![ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash - Image 2](https://m.media-amazon.com/images/I/71BW4z3FhwL.jpg) ![ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash - Image 3](https://m.media-amazon.com/images/I/61UXt7qXa2L.jpg) ![ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash - Image 4](https://m.media-amazon.com/images/I/51QfJzbVoYL.jpg) ![ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash - Image 5](https://m.media-amazon.com/images/I/61Xh3ofERLL.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 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 - DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash - ELEGOO MEGA R3 Board ATmega 2560 + USB Cable Compatible with Arduino IDE Projects RoHS Compliant - EDGELEC 120pcs Breadboard Jumper Wires 10cm 15cm 20cm 30cm 40cm 50 cm 100cm Wire Length Optional Dupont Cable Assorted Kit Male to Female Male to Male Female to Female Multicolored Ribbon Cables --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash](https://www.desertcart.sg/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-05-12*