Use NodeMCU to send push button signal to remote MQTT client « osoyoo.com
IoT Door Sensor Reed Switch based Security System using Nodemcu
1btn is a Battery Powered Open Source ESP8266 WiFi Button - CNX Software
Buy ESP8266 WiFi 5V 1 Channel Relay Module IOT Smart Home Remote Control Switch
Smart Switch using Blynk | IoT Based WiFi Switch - IoT Starters
WiFi Relay Module 5V ESP8266 ESP-01 4 Channel Remote Control Switch for Smart Home IOT Transmission Phone APP Controller : Amazon.de: Business, Industry & Science
WiFi Switch for home appliances with ESP8266
Smart altenative switch with ESP8266, ioBroker and MQTT - Hackster.io
Simple IoT Remote Switch With MQTT and ESP8266 : 4 Steps (with Pictures) - Instructables
ESP8266 WiFi 12V 2 Channel Relay Module IOT Smart Home Remote Control Switch Android Phone APP Control Transmission Distance 100M
GitHub - garthvh/esp8266button: An IoT Dash Like Button using an esp8266, a push button and GitHub Actions. Tested on an Adafruit Huzzah, SparkFun Thing, and Wemos D1 Mini
ESP8266 Wi-Fi Button Amazon Dash | Random Nerd Tutorials
DIY Wi-Fi Smart Switch for Home Automation
REES52 AC 220V ESP8266 WIFI Relay Module IOT Smart Home Cellphone APP Remote Control Switch : Amazon.in: Industrial & Scientific
IOT ESP8266 ESP01S WiFi 5V 1 Channel Relay Module Remote Control Switch for Smart Homes
Button Shield for D1 Mini ESP8266 WiFi WeMos Module IoT Wireless Control - Walmart.com
Für Arduino ESP8266 AC 220V WIFI Relais Schalter Fernbedienung Smart Home IOT Übertragung Relais Modul Bord|Integrierte Schaltkreise| - AliExpress
ESP8266 Node MCU board specifications and pins descriptions. Frequently asked questions related to WI-FI board esp8266 node MCU
ESP8266 IOT Board(Arduino IDE or NodeMCU Lua Programming) - Elecrow