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I have 10 Rasp. I want to communicate them with each other. Making one of them as an hot-spot Wi-Fi access point and connect the other 9 Rasp. to it, is possible. But it is not fault tolerant. If the Wi-Fi Hotspot Rasp. fails, then all the networking will be broken. Rest of the 9 Rasp. cannot communicate each other. Any idea? How can I configure, each Raspberry to become an access point whenever needed?

John Puskin
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What you're looking to do is called Ad Hoc WiFi. That answer can be found here: Ad Hoc setup in RPi 3

CharlieHorse
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