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Add battery status to bluetooth_le tracker (#12507)

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* Add battery status to bluetooth_le tracker

Added a parameter to enable the Bluetooth LE device tracker to check
the battery status of tracked devices.

* Improve documentation after PR changes
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guillempages 2020-05-10 15:53:32 +02:00 committed by GitHub
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source/_integrations/bluetooth_le_tracker.markdown
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@ -37,6 +37,11 @@ track_new_devices:
required: false
default: false
type: boolean
track_battery:
description: Whether the integration should try to read the battery status for tracked devices.
required: false
default: false
type: boolean
interval_seconds:
description: Seconds between each scan for new devices.
required: false
@ -47,6 +52,8 @@ interval_seconds:
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.
Enabling the battery tracking might slightly decrease the duration of the battery, but since this is only done at most once a day, this shouldn't be noticeable. Not all devices offer battery status information; if the information is not available, the integration will only try once at startup.
## 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 and hcitool the missing capabilities to access the Bluetooth stack. Quite like setting the setuid bit (see [Stack Exchange](https://unix.stackexchange.com/questions/96106/bluetooth-le-scan-as-non-root) for more information).