I've heard the same thing can become an issue if there are too many meshtastic units in an area, yeah. I wonder if the short range of BT is actually a benefit in this case? Low power and low range would cut down on the amount of interference. You wouldn't be dealing with the entire crowd, just people within tens of meters? I've only got 2 nodes to play with so I'm not sure πŸ˜‚

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In open air it’s much worse compared to a closed space. And signals far but not far enough will appear as noise and will still make it worse. 3MHz is also still tiny bandwidth.
It'll be interesting to see. The white paper also mentions Wi-Fi direct being used as a transport. The mesh could auto configure to switch between transports depending on the local conditions. Within the local area some areas would use Bluetooth and others WiFi, with nodes at the edges working as crossovers between the two. That at least let's you get two different frequency bands, if 5ghz wifi is available, plus more & wider channels on Wi-Fi.
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