With the AZ-Delivery ESP8266-01S relay module you have the possibility to switch a relay comfortably via WLAN. With the help of free firmware, the module can be integrated into existing networks, without any programming knowledge! The powerful ESP-01S with 1 MB memory and 80 MHz CPU clock allows independent execution, even of more complex applications.  A powerful PCB antenna ensures a good reception and allows a use with high range. The module is ideal for various smart home and Internet of Things applications. ✔️ The relay is compatible with open source firmware such as Tasmota. ✔️ The module is convenient to use and can be switched with only one GPIO pin ✔️ Use without programming knowledge is possible ✔️ Control of the relay is possible via WLAN 802.11 b/g/n ✔️ Supply voltage 5V ✔️ Popular in the community Our AZ-Delivery Relay Modules switch quickly and reliably many switching operations. For complex Arduino projects, where you want to control devices with larger current, many of our AZ-Delivery Relay Modules are suitable - let our assortment convince you! Welcome to the AZ-Delivery family! Here you will find high quality products for your projects with Arduino and Raspberry Pi. We are pleased to offer you a range of application examples, complete installation guides, e-books, libraries and personal support. ⭐️⭐️⭐️⭐️ AZ-Delivery: Your microelectronics expert! https://elecena.pl/product/19987997/esp8266-01s-esp-01s-wifi-module-5v-with-relay-adapter 2021-12-20 https://elecena.pl/product/19987997/esp8266-01s-esp-01s-wifi-module-5v-with-relay-adapter 2026-03-16