Until now, many solutions have been introduced for wireless mesh networks using various technologies. The initial goal was to create a reliable network for tactical military use cases. After that, the technology was used for industrial purposes, and later for smart buildings and homes. The main reason that implementations of mesh over WiFi and Zigbee have failed to gain mass adoption is lack of interoperability between vendors. So far, most of the solutions have been proprietary. The new Bluetooth mesh is about to change that.
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