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In July 2017 Bluetooth SIG released the first mesh network specification for low energy devices. This implementation uses a "flooding" approach to relay payloads of data (messages) across the mesh network. It is important to note that the mesh specification is external to the Bluetooth core specification and not part of the Bluetooth 5 or any previous Bluetooth 4 specification. More details on Bluetooth mesh can be found on the SIG website: bluetooth.com/mesh. TI intends to support mesh networking in a future SDK offering.
