---
layout: page
title: "Bluetooth LE Tracker"
description: "Instructions for integrating bluetooth low-energy tracking within Home Assistant."
date: 2016-08-24 00:00
sidebar: true
comments: false
sharing: true
footer: true
logo: bluetooth.png
ha_category: Presence Detection
ha_iot_class: "Local Poll"
ha_release: 0.27
---

This tracker discovers new devices on boot and in regular intervals and tracks Bluetooth low-energy devices periodically based on interval_seconds value. It is not required to pair the devices with each other.

Devices discovered are stored with 'BLE_' as the prefix for device mac addresses in `known_devices.yaml`.

This platform requires pybluez to be installed. On Debian based installs, run

```bash
$ sudo apt install bluetooth
```

Before you get started with this platform, please note that:

 - This platform is incompatible with Windows
 - This platform requires access to the bluetooth stack, see [Rootless Setup section](#rootless-setup) for further information

To use the Bluetooth tracker in your installation, add the following to your `configuration.yaml` file:

```yaml
# Example configuration.yaml entry
device_tracker:
  - platform: bluetooth_le_tracker
```

{% configuration %}
track_new_devices:
  description: If new discovered devices are tracked by default.
  required: false
  default: true
  type: boolean
interval_seconds:
  description: Seconds between each scan for new devices.
  required: false
  default: 12
  type: integer
{% endconfiguration %}

As some BT LE devices change their MAC address regularly, a new device is only discovered when it has been seen 5 times.
Some BTLE devices (e.g., fitness trackers) are only visible to the devices that they are paired with. In this case, the BTLE tracker won't see this device.

## {% linkable_title Rootless Setup %}

Normally accessing the Bluetooth stack is reserved for root, but running programs that are networked as root is a bad security wise. To allow non-root access to the Bluetooth stack we can give Python 3 the missing capabilities to access the Bluetooth stack. Quite like setting the setuid bit (see [Stack Exchange](http://unix.stackexchange.com/questions/96106/bluetooth-le-scan-as-non-root) for more information).

```bash
$ sudo apt-get install libcap2-bin
$ sudo setcap 'cap_net_raw,cap_net_admin+eip' `readlink -f \`which python3\``
```

A restart of Home Assistant is required.

For additional configuration variables check the [Device tracker page](/components/device_tracker/).
