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I bought two of these dev boards, but would like to get more. I want to use several of these to build a mesh network. So that means I need to figure out how to get several of these to speak to each other. I could use either the "proprietary 2.4 GHz protocol" or BLE (although ultimately, I'd like to support more devices than BLE). Are there any examples of how to accomplish this from within the Arduino bootloader? Ultimately, my goal is to do very low frequency digital I/O to each device while maximizing battery life.