--- product_id: 196864178 title: "3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book!" brand: "azdelivery" price: "€ 27.50" currency: EUR in_stock: true reviews_count: 12 url: https://www.desertcart.gr/products/196864178-3-x-esp8266-01s-esp-01s-serial-wireless-wlan-wifi store_origin: GR region: Greece --- # 80MHz Processor 1MB Flash Memory WiFi 802.11 b/g/n 3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book! **Brand:** azdelivery **Price:** € 27.50 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate Your Projects with Cutting-Edge Connectivity! ## Quick Answers - **What is this?** 3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book! by azdelivery - **How much does it cost?** € 27.50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/196864178-3-x-esp8266-01s-esp-01s-serial-wireless-wlan-wifi) ## Best For - azdelivery enthusiasts ## Why This Product - Trusted azdelivery brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Generous Memory:** Store and run your projects smoothly with 1MB of flash memory. - • **User-Friendly Setup:** Get started quickly with our included e-book and installation guides. - • **Powerful Performance:** Experience lightning-fast processing with an 80MHz microcontroller. - • **Seamless Connectivity:** Control your devices effortlessly with WiFi 802.11 b/g/n. - • **Versatile Applications:** Compatible with various open-source firmware for endless possibilities. ## Overview The AZDelivery 3 x ESP8266-01S ESP-01S WiFi Transceiver Module set includes three powerful modules with a relay adapter, designed for seamless integration with Arduino. Each module features a robust 80MHz processor, 1MB flash memory, and supports WiFi connectivity, making it perfect for a variety of DIY projects. The included e-book provides essential guidance for quick setup and application examples, ensuring you hit the ground running. ## Description 3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book! ## Features - Get 3 x AZDelivery ESP8266-01S ESP-01S WiFi module 5 V with relay adapter - The AZ-Delivery ESP-01S module with microcontroller and 1 relay for up to 50 V AC / 5 A or 30 V DC / 5 A in a practical and affordable set. Dimensions (L x W x H): 45 x 28 x 19 mm. The AZ-Delivery ESP01S module is fully compatible with various open source firmwares such as Tasmota, which are available online - Control the relay via WLAN 802.11 b/g/n. The controller is equipped with a flash memory of 1 MB and the processor with a speed of 80 MHz for autonomous work. The module is comfortable to use and can be switched with just one GPIO pin - The module is also equipped with a generously sized relay to reliably perform many switching operations. Easy to use thanks to a digital input, so no library/program library is necessary - ✅ This product contains an e-book that contains useful information about the beginning of your project, it helps with a quick setup and saves time in the configuration process. We offer a range of application examples, complete installation guides and libraries. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | AZDelivery | | Part number | 3x ESP-01S + Relais | | Item Weight | 80 g | | Package Dimensions | 14.5 x 9 x 2.54 cm; 80 g | | Item model number | AZDeliveryESP01S+Relais | | Size | 3x ESP-01S + Relais | | Item Package Quantity | 1 | | Batteries included? | No | | Batteries Required? | No | ## Images ![3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book! - Image 1](https://m.media-amazon.com/images/I/71QDI55U0hL.jpg) ![3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book! - Image 2](https://m.media-amazon.com/images/I/71hjibIjF6L.jpg) ![3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book! - Image 3](https://m.media-amazon.com/images/I/61eQD2V9SBL.jpg) ![3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book! - Image 4](https://m.media-amazon.com/images/I/71LR--BhiML.jpg) ![3 x ESP8266-01S ESP-01S Serial Wireless WLAN WiFi Transceiver Module 80MHz 1MB Flash 5V with ESP8266 Relay Adapter compatible with Arduino Including E-Book! - Image 5](https://m.media-amazon.com/images/I/71FYs-QCALL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: Please confirm the onboard stc microcontroller has the firmware compatible with esp module.** A: You will find that the stc microcontroller on the relay pcb is a considerable hindrance to what you may want to do with the ESP-01S module. Better to buy a relay pcb without a microcontroller. **Q: What is the supply voltage of the relay board please? I can see it has a regulator for the 3.3v, just wondering if the board will work of a 12v supply** A: The board requires a 5v supply **Q: Where are the numerous application examples, full installation guides, eBooks, libraries and assistance? It all appears to be in German** A: Go to the AZDelivery eBooks Website. When you select a book it ask you to select which language you would like. I have downloaded the English Version so I know that it exists. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Worked straightaway after the idiot was replaced *by S***N on Reviewed in the United Kingdom on 29 November 2023* Did a little bit of searching and found the free E-book they talk about. The device didn't work at first but when I stepped away and returned to try again, after a mug of tea, I realised I had not fully understood the instruction on my first attempt. Once I followed the instructions it worked instantly.I can't comment on the WiFi range because I have all of the building with strong signal, so the device will respond perfectly in that environment.Now onto the next problem - remembering what I purchased them for! ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars These are the version with just an optoisoswitching pin 00 works perfectly. *by K***E on Reviewed in the United Kingdom on 6 May 2022* These are the version with just an optoisolator (no processor which needs serial data) so switching pin 00 works perfectly. I'll be ordering more ### ⭐⭐⭐⭐ 4.0 out of 5 stars Did exactly what I wanted *by H***S on Reviewed in the United Kingdom on 20 January 2023* Arrived very quickly.Very small board about 3.5cm * 2.5cm * 1.5cm.Unlike some other comments here my board just had a relay, EL817 photo coupler and a AMS1117 3.3V voltage regulator and no serial chip so I believe the relay is operated from GPI00 on the ESP8226 (script suggests that also).There is a small blue LED on the board which lights when the relay is on.Relay has common, NC and NO terminals.Relay board needs 5V DC supply.Unlike others I found the WIFI on the 8226 was ok, distance from WiFi to where I located the relay was around 150 feet with the WiFi in the house behind a window and the relay in a stable.The only real gripe I have is the screw connectors for the input DC were VERY tight.The script provided worked fine but it was using DHCP (which wasn't convenient as the IP address can change). I made a few small changes:IPAddress ip(192, 168, 1, 150);IPAddress gateway(192, 168, 1, 1);IPAddress subnet(255, 255, 255, 0);WiFi.config(ip, gateway, subnet);WiFi.begin(ssid, password);to fix the IP address.I was connecting relay to a 12V system so I also bought a 7805 voltage regulator as shown in the photos.Relay can be turned on/off with http://192.168.1.150/RELAY=OFFBiggest issue I had was I'd not used the ESP8266 before and I didn't realise:"GPIO02 must be grounded while booting, in order to allow the chip to enter programming mode. To do this create a bridge between GPIO2 and GND. This bridge must be removed after programming."Without this the Arduino IDE always fails to upload the code. --- ## 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.gr/products/196864178-3-x-esp8266-01s-esp-01s-serial-wireless-wlan-wifi](https://www.desertcart.gr/products/196864178-3-x-esp8266-01s-esp-01s-serial-wireless-wlan-wifi) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-06-01*