--- product_id: 7443534 title: "ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash" brand: "diymall" price: "€ 12.90" currency: EUR in_stock: true category: "Di Ymall" url: https://www.desertcart.at/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash store_origin: AT region: Austria --- # Ultra-compact & lightweight design 4MB high-speed flash memory Robust Wi-Fi signal strength ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash **Brand:** diymall **Price:** € 12.90 **Availability:** βœ… In Stock ## Summary > πŸš€ Power your smart projects with the ESP8266 ESP-01S β€” 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?** € 12.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/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 - β€’ **Trusted & Proven:** Join over 800 satisfied users with a 4.5-star rating, backed by a 1-year warranty for peace of mind. - β€’ **Minimalist Powerhouse:** At under 1 inch and just 3 grams, this module fits perfectly into any compact design without compromising power. - β€’ **Generous 4MB Flash Memory:** Store complex programs and firmware updates with ample onboard flash, ensuring smooth and versatile performance. - β€’ **Plug & Play Compatibility:** Easily program using Arduino IDE’s 'Generic ESP8266 Module' setting, compatible across Windows, macOS, and Linux. - β€’ **Seamless Wi-Fi Integration:** Connect effortlessly with the latest ESP-01S module, delivering a stronger and more reliable signal for your IoT projects. ## Overview The ESP8266 ESP-01S WiFi Serial Transceiver Module by DIYmall features a robust 4MB flash memory and enhanced signal strength in a compact 0.98" x 0.39" x 0.47" form factor. Compatible with UART and USB interfaces, it supports seamless programming via Arduino IDE across major operating systems. Ideal for developers seeking reliable, high-performance Wi-Fi connectivity in IoT and embedded applications. ## Description Buy DIYmall ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash: Network Transceivers - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases ## 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 | #83 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 808 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/61aJWd+jXRL.jpg) ![ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash - Image 2](https://m.media-amazon.com/images/I/71WuYnIxyCL.jpg) ![ESP8266 ESP-01S WiFi Serial Transceiver Module with 4MB Flash - Image 3](https://m.media-amazon.com/images/I/61ZPrjKNNUL.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! ## 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash](https://www.desertcart.at/products/7443534-esp8266-esp-01s-wifi-serial-transceiver-module-with-4mb-flash) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-07-17*