This directory contains command-line tools for Bluetooth development.

Note: to use the bluetooth tools with your Fuchsia build, add --with //src/connectivity/bluetooth/tools to your fx set command.


bt-hci-tool uses the host HCI library to send HCI commands directly to a bt-hci device (/dev/class/bt-hci/000 by default)

Currently all bt-hci devices are automatically claimed by the bt-host driver. To use bt-hci-tool, disable the bt-host driver, which is done via the driver.<driver_name>.disable kernel cmdline flag.

This can be done at build-time by modifying your fx set to:

fx set <whatever else you put here> --args=dev_bootfs_labels=\[\"//src/connectivity/bluetooth:disable-bt-host\"\]

or by adding:

dev_bootfs_labels = [ "//src/connectivity/bluetooth:disable-bt-host" ]

to your fx args.

The build-time method is recommended, but you may also be able to do so by passing driver.bt_host.disable to the kernel command line at pave time (not tested):

On host machine:

$ fx pave -- driver.bt_host.disable

On Fuchsia:

$ bt-hci-tool reset
  Sent HCI_Reset (id=1)
  Command Complete - status 0x00 (id=1)
$ bt-hci-tool read-bdaddr
  Sent HCI_Read_BDADDR (id=1)
  Command Complete - status 0x00 (id=1)
  BD_ADDR: 00:1A:7D:DA:71:0A


bt-snoop-cli is a command line client of the bt-snoop service. bt-snoop monitors snoop channels for all bluetooth adapters on the system. bt-snoop-cli subscribes to snoop logs for HCI devices and writes traffic to a file (stdout by default) supporting the pcap format. The captured packets can be visualized using any protocol analyzer that supports pcap (e.g. Wireshark).

This will fetch the current buffer of packets for all devices under /dev/class/bt-hci/, output the traffic to stdout, then exit:

$ bt-snoop-cli --dump --format pretty

To initiate a live capture using Wireshark (on host):

$ fx shell bt-snoop-cli | wireshark -k -i -

To specify a custom HCI device (“005”) and output location (on device):

$ bt-snoop-cli --output /my/custom/path --device 005

Logs can then be copied from the Fuchsia device and given to any tool that can parse BTSnoop (e.g. Wireshark):

$ fx cp --to-host :/tmp/btsnoop.log ./
$ wireshark ./btsnoop.log

See the tool's help for complete usage:

$ bt-snoop-cli --help


bt-cli is a command-line interface for the Generic Access Profile (using the fuchsia.bluetooth.sys FIDL interfaces). This can be used to query available Bluetooth controllers, to perform dual-mode discovery and connection procedures, and to respond to pairing requests.

The bluetooth process does not need to be run directly before using bt-cli, as it will be launched by sysmgr if necessary.

$ bt-cli
bt> adapter
        identifier:     35700c9b-6748-4676-bd2c-1d863fd89210
        addresses:      [address (public) 28:C6:3F:2F:D4:14]
                        [address (random) 28:C6:3F:2F:D4:15]
        active:         true
        technology:     DualMode
        local name:     fuchsia fuchsia-unset-device-name
        discoverable:   false
        discovering:    false

Other Tools

This package contains additional tools. Refer to each tool's own README for more information.