Building an IoT power switch with the ESP8266 (and control it with your Amazon Echo!) | by w4ilun | Medium
How To: DIY Home Automation With NodeMCU and Amazon Alexa : 13 Steps (with Pictures) - Instructables
Smart Home Esp8266 Wifi Relay Module Mobile App Remote Control Switch Access Door Lock Relay Module - Buy Home Automation,Smart Home System,Remote Control Switches Product on Alibaba.com