title: How to retrieve advertising payload from iBeacon / BLE
body: <p>How do you retrieve the advertising payload for a Bluetooth LE emitter in Linux?</p>
  <p>Specifically, I've configured Arduinos and Raspberry Pis using <a href="https://linux.die.net/man/1/hcitool" rel="nofollow noreferrer">hcitool</a> to act as iBeacons.</p>
  <p>What I'm looking for is a command to print out what the current advertising payload is for the device.</p>