Datasheet

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Can I make two Bluefruit nRF52's talk to each other?

Yes, by running one board in peripheral mode and one board in central mode, where the central will establish a

connection with the peripheral board and you can communicate using BLE UART or a custom service. See the

following Central BLE UART example to help you get

started: https://github.com/adafruit/Adafruit_nRF52_Arduino/tree/master/libraries/Bluefruit52Lib/examples/Central