Datasheet

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UPDATE: For more specific details on the limitations of various Android versions and phones, see this helpful post

from Nordic Semiconductors.

Can my Bluefruit board detect other Bluefruit boards or Central devices?

No. All of our Bluefruit LE modules currently operate in peripheral mode, which means they can only advertise their

own existence via the advertising payload. The central device (usually your phone or laptop) is responsible for

listening for these advertising packets, starting the connection process, and inititating any transactions between the

devices. There is no way for a Bluefruit module to detect other Bluefruit modules or central devices in range, they

can only send their own advertising data out and wait for a connection request to come in.