Use Homie Firmware to Drive Sonoff Switch Module (ESP8266 Based) : 5 Steps (with Pictures) - Instructables
Connect Sonoff Basic Switch to the Arduino IoT Cloud - Hackster.io
SONOFF NSPanel WiFi Smart Switch,2-Switch Panel Smart Home Hub Control,Touchscreen Control for Smart Thermostat Function,Work with Alexa & Google Home Assistant - Walmart.com
SONOFF POWR3 Smart WiFi Wireless Light Switch with Energy Monitoring, Universal DIY Module for Smart Home, Compatible with Alexa & Google Home Assistant, No Hub Required: Amazon.com: Tools & Home Improvement
SONOFF Smart Switch Dimmer Wi-Fi Wall Switch Compatible with Alexa and Google Home, 2.4GHz Wi-Fi Light Switch, Neutral Wire Required,M5 - Walmart.com
Sonoff WiFi Wireless Smart Switch | Random Nerd Tutorials
SONOFF WiFi Smart Curtain Switch with Power Metering TUV Certified, DUALR3 Dual Relay DIY Curtain, Blinds, Roller Shutter,Two Way Smart Switch,Works with Alexa&Google Assistant(1 Pack) - Amazon.com
SONOFF Basic R2 10A Smart WiFi Wireless Light Switch, Universal DIY Module for Smart Home Automation Solution, Works with Amazon Alexa & Google Home Assistant, Works with IFTTT, 1 Pack - Amazon.com