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ESP8266 Wireless Light Switch - UK Mains - Schematic/PCB Review and Suggestions - Project Guidance - Arduino Forum
ESP8266 NodeMCU Digital Inputs and Digital Outputs (Arduino IDE) | Random Nerd Tutorials
I found a great and inexpensive ESP8266 based smart switches for ESPHome and Hassio. : r/homeassistant
1pcs ESP8266 WiFi Relay Module with ESP-01S Relay Adapter Module for Smart Home Appliance Connect Fan Illuminator Smart Switch Phone APP Remote Control Switch Wireless Transceiver: Amazon.com: Industrial & Scientific
TASMOTA Smart Switch by Martin Jerry | ESP8266 2.4GWiFi, Smart Light Switch for Home Assistant | WiFi Smart Home Devices: Amazon.com: Tools & Home Improvement