The ESP8266-01/01S 5VRelay Module, we use the GPIO0 of ESP-01/ 01S to control the relay by low level. It’s easy to DIY your smart switch to any device by your phone anywhere with this smart relay. We support the APP and LUA source code, it can be used for smart home, IOT and other DIY projects. Package Includes : 1 x ESP8266-01/01S 5VRelay Module
