Whether you already have an Itead Sonoff or the Electrodragon IoT Relay Board, or are simply exploring relay solutions for your IoT project, check out this review by Nathan Chantrell of these two modules.
I’m using these with MQTT and Node-RED so that they seamlessly integrate with the other WiFi and 433MHz remote mains devices that I already have. In day to day use there will be no way to tell which type of device is controlling a particular light or appliance which is just how it should be.
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