Send an L2CAP echo request and receive an answer.
# To ping a Bluetooth device:
sudo l2ping <mac_address>
# To reverse ping a Bluetooth device:
sudo l2ping -r <mac_address>
# To ping a Bluetooth device from a specified interface:
sudo l2ping -i <hci0> <mac_address>
# To ping Bluetooth device with a specified sized data package:
sudo l2ping -s <byte_count> <mac_address>
# To ping flood a Bluetooth device:
sudo l2ping -f <mac_address>
# To ping a Bluetooth device a specified amount of times:
sudo l2ping -c <amount> <mac_address>
# To ping a Bluetooth device with a specified delay between requests:
sudo l2ping -d <seconds> <mac_address>