Bluetooth Mesh: When Every Device Becomes a Router
You already own a Bluetooth mesh network. You just don't know it. If the lights in your office building dim automatically when the sun comes out, or the LED fixtures in a supermarket report their own energy use back to a dashboard, there's a decent chance a few thousand nodes are quietly relaying messages to each other over Bluetooth right above your head. Not the Bluetooth in your earbuds. Something fundamentally different. 📡 The Short Version Bluetooth mesh is a separate spec, built on BLE's radio but operating nothing like classic Bluetooth. BLE connects two devices — pair, hold a link, talk privately. Bluetooth mesh is a broadcast model: a device shouts, any node in earshot repeats it, that relay is heard by more nodes, who repeat it again. The message floods outward until it arrives. No pairing. No central coordinator. No center at all. The network scales as far as there are nodes to carry it — not as far as one radio can shout. Managed Flooding: The Be...