That’s the Sonoff WiFi Wireless Smart Switch for MQTT COAP Smart Home. Sonoff is a cost effective smart home solution designed and produced by ITEAD. Yup, ITEAD specializes in developing and manufacturing hardware and smart home products. And it is located in Shenzhen, China. They have lot of other Internet of Things (IoT) products as well for your smart home. Sonoff Switch is just one of them for end users. Prototyping modules, low-cost development platforms and even custom made solution are also available…