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Mastering Arduino by Jon Hoffman

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Bluetooth LE broadcasting

The following diagram shows the network topology for a broadcast network:

There are two roles defined when broadcasting:

  • Broadcaster: This device sends non-connectable advertising packets at set time intervals to any other device that is listening
  • Observer: This device scans the advertising frequencies to receive the non-connectable advertising packets that the broadcaster is sending out

Broadcasting data is the only way that a device can send data to multiple devices. The standard broadcasting packet can have a payload of 31 bytes of data, which is usually used to describe the broadcaster and its capabilities. ...

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